Re: [Tagging] Water featuers

2015-05-23 Thread Richard Z.
On Fri, May 22, 2015 at 03:54:57PM +0100, Andy Mabbett wrote:
 On 22 May 2015 at 15:29, Dave Swarthout daveswarth...@gmail.com wrote:
  I am uncomfortable with cascade - in several languages it
  means waterfall so there is considerable potential for
  confusion.
 
  I agree. A cascade is a waterfall in American English.
 
 How, then would you describe:
 
 
 https://commons.wikimedia.org/wiki/File:Water_Feature_in_Cabot_Place,_Canary_Wharf_%282%29_-_geograph.org.uk_-_1472986.jpg

it could be a weir and waterfall
 http://wiki.openstreetmap.org/wiki/Waterfalls#Artificial_waterfalls

or some kind of playground

Richard

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Re: [Tagging] Damage Assessment Tags - Would like feedback on a schema

2015-05-22 Thread Richard Z.
On Thu, May 21, 2015 at 09:52:06PM -0700, Bryce Nesbitt wrote:
 Note that just because you can collect some data, does not make it a good
 idea to put in OSM.  Maintenance is harder than collection: and who's going
 to go back three years after the HOT event and clean up?

same is even worse with other data like phone=*


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Re: [Tagging] Damage Assessment Tags - Would like feedback on a schema

2015-05-22 Thread Richard Z.
On Thu, May 21, 2015 at 09:36:10PM +0200, Andreas Goss wrote:
 As you linked to this on the HOT list a few things noticed...
 
 
 What about the typhoon:, earthquake: or tsunami: tags? Replaced with
 damage:event?
 
 What about e.g. damage:building? This could still be used even if you have
 building= and damage=
 
 What about the status= and impassable= keys and tags?

some of the lifycecle prefixes would fit this situation and are already
documented and in use.
http://wiki.openstreetmap.org/wiki/Lifecycle_prefix

Richard

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Re: [Tagging] Water featuers

2015-05-22 Thread Richard Z.
On Fri, May 22, 2015 at 09:26:34AM -0500, John F. Eldredge wrote:
 The water feature we are talking about here is an artificial waterfall,
 usually pump-driven.

in that case it might be better to either use normal waterfall tagging 
   node with waterway=waterfall+ way waterway=weir, 
   possibly also waterway=dam and man_made=yes
or a distinct tag which is not so easy to confuse as synonymous.

Richard

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Re: [Tagging] Water featuers

2015-05-22 Thread Richard Z.
On Fri, May 22, 2015 at 02:00:30PM +0200, Martin Koppenhoefer wrote:
 
 
 
 
  Am 22.05.2015 um 13:35 schrieb Andy Mabbett a...@pigsonthewing.org.uk:
  
  These might be cascades, rills, reflecting-pools, rain-chains, moats, etc.
  
  We might, for example, have:
  
natural=water
water=cascde
  
  etc. - but not:
  
water=fountain
  
  as we already have
  
amenity=fountain
  
  or we could have:
  
amenity=cascade

I am uncomfortable with cascade - in several languages it
means waterfall so there is considerable potential for 
confusion.

Richard

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Re: [Tagging] Group of islands?

2015-05-17 Thread Richard Z.
On Sun, May 17, 2015 at 04:15:02PM +0100, Philip Barnes wrote:
 Archipelago?

the text says

Groups of islands:
add the natural=coastline into a multipolygon.


why would I do that?

Richard

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[Tagging] Group of islands?

2015-05-17 Thread Richard Z.

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Re: [Tagging] access tags (was contact: tags)

2015-05-10 Thread Richard Z.
On Sun, May 10, 2015 at 12:22:07AM -0700, Bryce Nesbitt wrote:
 On Sat, May 9, 2015 at 11:31 PM, Mateusz Konieczny matkoni...@gmail.com
 wrote:
 
 
  IMHO it would make editing and using data harder. It sounds like
  something that should be improved by a better interface for editors
  (grouping similar tags together).
 
 
 Exactly the problem. How can a computer tell that dog hgv and mofa
 should all be grouped?
 
 With a prefix, a consumer like a smartphone app can group all the
 restrictions,.
 
 Right now building automated tools against the data is fragile.  For
 example the access for boats is spread across quite
 a number of tags.  Even determining if a facility is applicable to a boat
 would require the consumer to keep up with
 all the various boat tags.  Having a class hierarchy would enable generic
 actions for watercraft, even if the data consumer
 did not understand all the options (e.g. generic watercraft which might
 be a fishing boat, wave runner, rowboat).

makes a lot of sense for me, the old system makes it pretty difficult to 
keep track of all possible tag combinations.

The transition from the old to the new system would probably take some time 
where the old and new system would have to coexist.

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Re: [Tagging] surface=pebbles - surface=pebblestone ?

2015-05-10 Thread Richard Z.
On Sun, May 10, 2015 at 01:29:48PM +0100, SomeoneElse wrote:
 Regardless of pebbles vs pebblestone, where did the distinction of
 gravel=sharp, pebblestone=rounded come from?   Is there any way to easily
 see who first contributed a particular section of a wiki page?

wikiblame would do it but as afaics does not search our wiki so 
someone would have to setup a server or arrange something with
wikiblame itself.

https://en.wikipedia.org/wiki/Wikipedia:WikiBlame

Richard

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Re: [Tagging] surface=pebbles - surface=pebblestone ?

2015-05-10 Thread Richard Z.
On Sun, May 10, 2015 at 03:03:14PM +0200, Richard Z. wrote:
 On Sun, May 10, 2015 at 01:29:48PM +0100, SomeoneElse wrote:
  Regardless of pebbles vs pebblestone, where did the distinction of
  gravel=sharp, pebblestone=rounded come from?   Is there any way to easily
  see who first contributed a particular section of a wiki page?
 
 wikiblame would do it but as afaics does not search our wiki so 
 someone would have to setup a server or arrange something with
 wikiblame itself.

actually wikiblame apparently works out of the box if you know which 
parameters to enter:
language: the word blank without quotes (not a blank)
project: wiki.openstreetmap

Richard

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Re: [Tagging] RFC - Criteria for taging as either via_ferrata or path

2015-04-25 Thread Richard Z.
On Fri, Apr 24, 2015 at 11:16:47AM +0200, Martin Koppenhoefer wrote:
 2015-04-24 11:01 GMT+02:00 Richard Z. ricoz@gmail.com:
 
  so are you happy that this
 
  http://www.bergsteigen.com/klettersteig/trentino-suedtirol/gardasee-berge/ferrata-rino-pisetta
  is tagged as highway=path ?
 
 
 
 
 I believe this clearly isn't a path, at least not at the spot you can see
 on the photo linked by you above. If you are aware of such mistagging,
 please correct it, it's a wiki...

FYI this is a 400 meters vertical wall. I would correct it but it appears
there are some more higway=paths in that impressive wall and I don't know them
all.

Richard



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Re: [Tagging] RFC - Criteria for taging as either via_ferrata or path

2015-04-24 Thread Richard Z.
On Fri, Apr 24, 2015 at 04:27:23AM +0200, Friedrich Volkmann wrote:
 On 24.04.2015 02:16, Warin wrote:
  Via ferrata should not be lumped into path or footway .. they are very
  significantly different and cannot be used in place of a path or footway.
  Would you take a 3 year old along it?
 
 Did you read the discussion tab? Farratas are not more difficult nor more
 dangerous than other paths. Where there's a ferrata and a parallel unsecured
 path in the same terrain, I would take the 3-year-old along the ferrata.

so are you happy that this
  
http://www.bergsteigen.com/klettersteig/trentino-suedtirol/gardasee-berge/ferrata-rino-pisetta
is tagged as highway=path ?

Richard

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Re: [Tagging] RFC - Criteria for taging as either via_ferrata or path

2015-04-24 Thread Richard Z.
On Fri, Apr 24, 2015 at 04:57:06AM +0200, Friedrich Volkmann wrote:
 On 23.04.2015 11:59, Richard Z. wrote:
  there were ongoing discussions concerning this subject so
  I have ammended the wiki:
  
  http://wiki.openstreetmap.org/wiki/Proposed_features/via_ferrata#Criteria_for_taging_as_either_via_ferrata_or_path
 
  use highway=via_ferrata where people commonly use ferrata kits
 
 This is an individual decision. I know someone who did all ferratas
 (difficulty A-E) in eastern Austria without a ferrata kit. I also saw people
 using a ferrata kit on an easy ladder, and on a short wire rope that is
 meant as a handrail.

Sure. But the phrase where people commonly use ferrata kits means
where you commonly see people using ferrata kits. It may be even a toy
ferrata for children - if you see plenty of them using ferrata kits it
is probably better to tag as ferrata.

 
 There are ferratas which are more than hundred years old. Nobody used
 ferrata kits back then, because they simply did not exist.

Back to today. Some of those very olde ferratas may be called ferrata but
perhaps don't really deserve to be tagged as that. Which is why I tired to
formulate this cirteria.
 
  a path is way where a hiker can walk without a ferrata kit and without 
  extensive use of arm muscles
 
 See above. What's an extensive use? Experienced climbers will tell you
 that they do it all by technique instead of muscle power.

it means to say you do not hang on your arms for a substantial part of
the path. Ladders can and should be mapped separately so they need not 
to be considered here.
Btw most hikers are not experienced climbers.

  a path should be safely passable without a ferrata kit even in less than 
  optimal weather
 
 So we need to delete all paths in high mountains, because they are neither
 ferratas nor safely passable when icy.

no. But if you can use the way safely only with a ferrata kit or climbing
equipment it should be mapped accordingly.

Richard

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Re: [Tagging] RFC - Criteria for taging as either via_ferrata or path

2015-04-24 Thread Richard Z.
On Fri, Apr 24, 2015 at 10:16:55AM +1000, Warin wrote:
 Some minor things ..
 
 overhang ?   Should not 'covered' be used?
 
  http://wiki.openstreetmap.org/wiki/Key:covered

overhang here means an additional technical difficulty of the
path.
Key:covered could be used in addition to that.


Richard

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[Tagging] RFC - Criteria for taging as either via_ferrata or path

2015-04-23 Thread Richard Z.
Hi,

there were ongoing discussions concerning this subject so
I have ammended the wiki:

http://wiki.openstreetmap.org/wiki/Proposed_features/via_ferrata#Criteria_for_taging_as_either_via_ferrata_or_path


Richard


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Re: [Tagging] Way inside riverbank

2015-04-21 Thread Richard Z.
On Mon, Apr 20, 2015 at 06:31:23PM +0200, Martin Koppenhoefer wrote:
 2015-04-20 18:14 GMT+02:00 Dave Swarthout daveswarth...@gmail.com:
 
  IMO you guys are kidding yourselves if you think most mappers actually
  measure the depth of rivers before drawing in the main stream
 
 
 
 yes, it is not the typical way we do map, but it is an ideal / a clear
 definition how it ideally should be. 


I believe it is so far away from current practice that it would deserve
an own tag waterway=deepest_path. Also because in some cases the navigation
route may not exactly follow the deepest path.


Richard

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Re: [Tagging] Ambiguous translations of waterway=dam - should be moved to man_made=dam

2015-04-16 Thread Richard Z.
On Thu, Apr 16, 2015 at 07:16:22AM +0300, Dave Swarthout wrote:
 I think redefining waterway=dam is gonna be a hard sell for most Americans.
 But now thanks to this list I understand why some reservoirs I've worked
 with in Thailand have had the name of the dam applied to the water behind
 them as well. As you probably know, many reservoirs in the U.S. have names
 that are different from the names of the dam that formed them, Lake Mead
 and the Hoover Dam, Lake Roosevelt and the Grand Coolee Dam, are just two
 of the better known ones. The dam and the water impounded behind it usually
 have different names.
 
 Even though I can agree that dams are man_made there are roughly 200K uses
 of the waterway=dam tag. You have a lot of convincing ahead of you.

not all of the dams are man_made, beavers are busy builders.

Richard

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Re: [Tagging] volcanic features proposal

2015-03-31 Thread Richard Z.
having a second look at it -

   geological=volcanic_lava_channel — way — lava flowing in a defined direction 

for wide lava channels it would be usefull to define the shape
somehow?

Richard


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Re: [Tagging] recommend tagging of volcanos as ways rather than nodes

2015-03-30 Thread Richard Z.
On Mon, Mar 30, 2015 at 01:26:35PM +0200, Martin Koppenhoefer wrote:

 Just discovered, this was changed only one year ago by user geozeisig,
 before there was a recommendation for areas as well:
 http://wiki.openstreetmap.org/w/index.php?title=Tag%3Anatural%3Dvolcanodiff=996213oldid=995784

no it was not. As pointed out in wiki it was part of the original 
proposal, Geozeisig only corrected the infobox to reflect what
the text says.

 Are there objections to put this back to areas or nodes? Is there support
 for such an action?

objections here. volcano is not here to map the crater rim. 

Richard

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Re: [Tagging] recommend tagging of volcanos as ways rather than nodes

2015-03-30 Thread Richard Z.
Hi,

http://wiki.openstreetmap.org/wiki/Talk:Tag:natural%3Dlava has some
thoughts how to map lava fields and calderas - I think those should
be finalized and documented.

Cut  paste
Lava fields 
natural=bare_rock (rock being used in the broad sense of a consolidated 
(solid) or unconsolidated (granular) layer) 
geological=* with =volcanic_lava_field or more specific tagging for 
solidified molten rock, pyroclastic mud flows etc 

Lava field features 
geological=volcanic_lava_channel — way — lava flowing in a defined 
direction 
geological=volcanic_lava_tube — way — naturally formed lava tunnel, may be 
active or extinct, https://en.wikipedia.org/wiki/Lava_tube 
etc 

Crater rims 
natural=cliff or natural=ridge and 
geological=volcanic_caldera_rim 

Volcanic vents (a volcano can often be a complex and have multiple vents) 
geological=volcanic_vent 

Fumaroles 
geological=volcanic_fumarole 

Geysers 
natural=spring or or natural=hot_spring (proposed)
geological=volcanic_geyser (I notice that the Iceland geyser is Geysir 
but the common English spelling is geyser. 

Richard

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Re: [Tagging] volcanic features proposal

2015-03-30 Thread Richard Z.

I have lifted the scheme originally proposed by Mike to
a proposal page, did not have time for details yet.

http://wiki.openstreetmap.org/wiki/Proposed_features/Volcanic_features

Richard

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[Tagging] areas (eg rocks) underwater and across coastline/water shores

2015-03-26 Thread Richard Z.
Hi,

it is mostly so that an area eg natural=bare_rock does not
end at the shoreline but extends some way under the water.
Current practice of having it end exactly on the shoreline
is both incorrect and a technical complication for mappers.

In many cases some of the underwater racks would be easy 
to map. Similar could apply to many other natural objects: 
ridges, cliffs and (sand) beaches usualy extend some way 
below water.
In fact mapping cliffs across rivers is the commonly used
solution in waterfall mapping.

So it would appear straightforward to map such natural features
across shore lines both under and above water.

How do people think about it? Should we generalise that approach
or seek another solutions?

What would happen with various renderers and other apps?

Should we use underwater/awash tag or prefix?

Richard



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Re: [Tagging] areas (eg rocks) underwater and across coastline/water shores

2015-03-26 Thread Richard Z.
On Thu, Mar 26, 2015 at 03:31:36PM +, Malcolm Herring wrote:
 On 26/03/2015 12:35, Richard Z. wrote:
 How do people think about it? Should we generalise that approach
 or seek another solutions?
 
 The way I have approached this is to map separate areas above and below the
 natural=coastline way  add the tag tidal=yes on the below HW area.

has the rendering of the tidal areas been defined somehow?

 Should we use underwater/awash tag or prefix?
 
 The OpenSeaMap object underwater/awash rock (seamark:type=rock) only refers
 to isolated rocks rather than a rocky seabed. Therefore it is only
 appropriate on a node.

how about underwater:natural=* and awash:natural=* ?

Richard

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Re: [Tagging] areas (eg rocks) underwater and across coastline/water shores

2015-03-26 Thread Richard Z.
On Thu, Mar 26, 2015 at 04:42:45PM +0100, Martin Koppenhoefer wrote:
 
 
 
 
  Am 26.03.2015 um 13:35 schrieb Richard Z. ricoz@gmail.com:
  
  Current practice of having it end exactly on the shoreline
  is both incorrect and a technical complication for mappers.
 
 
 
 I believe for mappers it is the easiest solution, not a technical 
 complication. It is typically very difficult to find out until where which 
 landcover reaches underwater.

Having areas end exactly at the waterline seems to be  a common 
reason for mapping mistakes and broken coastlines so I don't see 
that it would be the easiest solution.

Also it is almost never so that the rock would end exactly at the 
waterline and even if you do not know exactly how far it extends 
underwater a good guess is still better than inserting wrong 
information.


Richard

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Re: [Tagging] waterway=lock_gate - is it only for nodes?

2015-03-19 Thread Richard Z.
On Wed, Mar 18, 2015 at 01:49:26PM +, Malcolm Herring wrote:
 On 18/03/2015 11:58, Richard Z. wrote:
 so should for example the OpenSeaMap tagging for bridges become
 deprecated?
 
 Not deprecated, but considered on a case-by-case basis. It is a question of
 whether important navigation information would be deleted if the seamark
 tags were removed. In the case of bridges, the safe air draft and beam are
 important attributes that should be kept, but a bridge that is absent those
 seamark attribute tags need not carry the seamark:type=bridge tag.

thanks, btw do you have any background info regarding the many
obstacle nodes which are present in German waterways?

Richard

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Re: [Tagging] waterway=lock_gate - is it only for nodes?

2015-03-18 Thread Richard Z.
On Tue, Mar 17, 2015 at 04:31:12PM +, Malcolm Herring wrote:
 On 17/03/2015 16:06, Brad Neuhauser wrote:
 Is there something I'm missing?
 
 No, you have spotted the fact that (as always!) that the documentation is
 unfinished. I had done it on this page:
 http://wiki.openstreetmap.org/wiki/OpenSeaMap/INT-1_Cross_Reference but I
 need to add notes/links on the other pages to direct people to the
 appropriate tag:* and key:* Wiki pages.

so should for example the OpenSeaMap tagging for bridges become
deprecated?

Richard

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Re: [Tagging] waterway=lock_gate - is it only for nodes?

2015-03-17 Thread Richard Z.
On Mon, Mar 16, 2015 at 08:50:48AM -0500, Brad Neuhauser wrote:
 
 
  For boat navigation purposes this should be crosslinked:
http://wiki.openstreetmap.org/wiki/OpenSeaMap/Gates
 
 
 Isn't it the other way around? That is, the people who tagged
 seagate:category:gate=lock (24 objects) should be making sure to also tag
 waterway=lock_gate (15K objects), not vice versa.

it should be both ways.

Actually in some cases I am wondering if the OpenSeaMap tags 
are really usefull where other tags exist (bridges, waterfalls 
and lock_gates for example).

Richard

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Re: [Tagging] waterway=lock_gate - is it only for nodes?

2015-03-16 Thread Richard Z.
On Mon, Mar 16, 2015 at 10:53:21AM +0100, Mateusz Konieczny wrote:
 According to wiki[1] waterway=lock_gate should be used only on nodes. Some
 are tagged on
 ways[2]. Why wiki considers node as the only valid element where this tag
 may be used? Is it
 because page is older than mapping rivers also as areas? Routing for boats?
 Some other reason?
 
 Is it a good idea to change wiki and mark tagging on nodes as a good idea?
 Is it a good idea to
 promote tagging also on ways[3]?

I think it makes sense to tag them as ways, analogous to weirs and dams.

For boat navigation purposes this should be crosslinked:
  http://wiki.openstreetmap.org/wiki/OpenSeaMap/Gates


Richard

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Re: [Tagging] Feature Proposal - RFC - goods_conveyor

2015-02-26 Thread Richard Z.
On Thu, Feb 26, 2015 at 11:22:10AM +0700, Dave Swarthout wrote:
 The Trans-Alaska pipeline has many underground sections and these have no
 layer tag. Why that is, I don't know. It also uses a key type to specify
 what it carries. In this case type=oil

this would be a case where location=underground seems well established.

Richard

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Re: [Tagging] Feature Proposal - RFC - goods_conveyor

2015-02-26 Thread Richard Z.
On Wed, Feb 25, 2015 at 05:34:04PM -0800, Bryce Nesbitt wrote:
 Would layer work for this.  A layer of zero for something you can't pass
 at ground level.
 A layer of -1 for pipelines.  A layer of 1 for ski lifts and areoways.

No. 

Aerialways (most of them) and powerlines have an implicit location=overground.

Pipelines use location as well.

Layer is defined differently than location and does say nothing whether 
something is above or under ground. It should be used where features cross
or overlap.

Richard

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Re: [Tagging] Feature Proposal - RFC - goods_conveyor

2015-02-25 Thread Richard Z.
On Wed, Feb 25, 2015 at 02:13:34PM +0100, Friedrich Volkmann wrote:
 http://wiki.openstreetmap.org/wiki/Proposed_features/Goods_conveyor
 
 I resurrected this old draft, because we need a tag for this and I know of
 no alternative tag currently in use. I wonder if goods may be misleading,
 because I think of goods as finished products, while many conveyors carry
 raw materials. Anyway, there are 589 uses of man_made=goods_conveyor, so we
 better stick with it.

there is aerialway=magic_carpet which is intended for human transport only
but together with usage  access keys could be used to tag that as well.

The proposal looks good, add location=* to it.

Richard

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Re: [Tagging] Feature Proposal - RFC - goods_conveyor

2015-02-25 Thread Richard Z.
On Wed, Feb 25, 2015 at 07:14:36PM +0100, Friedrich Volkmann wrote:

 
  The proposal looks good, add location=* to it.
 
 I dislike location=* for various reasons. But you may use it if you like.

the proposal could be more detailed in this point. How do
you tag conveyors above ground? As bridge?

Richard

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Re: [Tagging] Deprecating aerialway=goods

2015-02-21 Thread Richard Z.
So let us see:

On Thu, Feb 19, 2015 at 05:57:47AM +0100, Andreas Labres wrote:
 
 A Materialseilbahn is a special type of aerialway (Seilbahn) and should have
 its own value. See the picture linked in the wiki. This is not a cable car, 
 this
 is not a gondola, it is a Materialseilbahn (if you don't have an english 
 word
 for it, this doesn't mean it doesn't exist).

...

On Thu, Feb 19, 2015 at 01:12:22PM +0100, Andreas Labres wrote:
 Richard,
 
 Those Materialseilbahnen (ropeways for goods) are typical in the Alps to
 supply alpine huts (where everybody can get something to eat and stay 
 overnight)
 with everything that is needed. The only alternative there is a helicopter 
 flight...
 
 
 On 19.02.15 12:24, Richard Z. wrote:
  try harder to find an english word for the special aerialway in the picture
  becuase mappers all over the world have been using this improperly to map
  large mining and industrial aerialways.
 
 I'd disagree that this is improper use. They are also Materialseilbahnen
 (ropeways for goods). There is no cabin for passengers but a loading platform 
 or
 kind of hanging lorry. The principle is the same as with (hanging) cable cars
 with a track rope and a drag rope, but the technolgy is much, much simpler, as
 there is no passengers in potential danger.


well in one place you insist on a very specific type specified in the picture 
and
used in the Alps which may or may not take passengers but you also say it is 
fine 
to use the same tagging for industrial or mining aerialways of whichever 
construction.
By that definition goods would be good to tag any kind of aerialway 
construction
which may or may not transport passengers.

I believe it would be more usefull to tag aerialways by type of construction 
(gondola, 
zip_line,cable_car,drag_lift,magic_carpet, funitel) and use additional tags to 
say 
it is used for transport of persons, goods or mixed.
As it happens we already have all the tags needed: usage=* and access=* type 
tags.

We can also have more special values things like the open casket miniature 
cable_car in
the picture.

Btw, an interesting case of mixed use:
http://1.bp.blogspot.com/-FReKw2jaO-Y/UG1s7Iq9J9I/IXI/04Z1fOD7u9I/s640/DSC_0149.JPG
http://2.bp.blogspot.com/-amlErNFPUYM/UG1s-w6gnBI/IXQ/KnO9g60tO74/s640/DSC_0136.JPG
found here 
http://unserewohnwagenreisen.blogspot.de/2012/10/eine-woche-sudschweiz-maggiatal.html
https://www.openstreetmap.org/way/68299644

Richard

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Re: [Tagging] Deprecating aerialway=goods

2015-02-21 Thread Richard Z.
On Thu, Feb 19, 2015 at 06:05:40PM +0100, Pieren wrote:
 On Thu, Feb 19, 2015 at 12:38 PM, Richard Z. ricoz@gmail.com wrote:

  How is routing software supposed to know that some aerialway=goods are
  actually taking passengers?

 like roads tagged with access=no or private. Or
 highway=pedestrian not allowed for cars. We create simple tags for
 the average contributors, not to simplify routing software dev's life.

perfect, so we do actually agree that normal access keys should be used.
Incidentally I believe this will also greatly help routing software which
should understand access keys anyways.

I am not doing this to help routing software but to do the right thing
- orthogonalize tagging by reusing already well established keys and apply 
them to aerialways instead of reinventing endless variations of them.

As of usage=*, I think it can be still used in addition to access keys
where it makes sense.
The railways also have railway:traffic_mode=passenger/mixed/freight which
might also be interesting to ship, aerialways and similar if it wasn't for
the railway: prefix.

Richard

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Re: [Tagging] Deprecating aerialway=goods

2015-02-19 Thread Richard Z.
On Thu, Feb 19, 2015 at 05:57:47AM +0100, Andreas Labres wrote:
 On 18.02.15 14:36, Richard Z. wrote:
  suggest deprecating this particular value of aerialway
 
 -1
 
 A Materialseilbahn is a special type of aerialway (Seilbahn) and should have
 its own value. See the picture linked in the wiki. This is not a cable car, 
 this
 is not a gondola, it is a Materialseilbahn (if you don't have an english 
 word
 for it, this doesn't mean it doesn't exist).

try harder to find an english word for the special aerialway in the picture 
becuase 
mappers all over the world have been using this improperly to map large mining 
and 
industrial aerialways.
Or - if an English word can not be found use the German word or make up 
something
like 
  aerialway=almbahn.
for this special case.

Meanwhile, key:access and usage should be usefull for all aerialways, even for 
the
almbahn - they do allow passenger or personel transport in some cases so good 
is
rather misleading.

Richard

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Re: [Tagging] ?=maze

2015-02-19 Thread Richard Z.
On Thu, Feb 19, 2015 at 06:48:33PM +0900, johnw wrote:
 I think it should be k kept under attraction, because a large mappable maze 
 is certainly an interest of tourists - especially if it is part of a larger 
 complex. 
 
 Then it would be 
 
 tourism=attraction
 attraction=maze
 maze=hedge
 
 or attraction:maze=hedge  instead of attraction=maze + maze=hedge  (so a 
 generic maze would be attraction:maze=yes) I actually like this better. 
 
 I don’t know which is better, but it certainly feels that any large maze - 
 new or historic - is a form of attraction, so it should go into that - 
 Especially if we are going to have a definition for special gardens in there 
 as well.  

in addition to that I think any large enough maze should be mapped with 
highway=maze or highway=path, dead end markers and emergency exits.

Richard

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Re: [Tagging] Deprecating aerialway=goods

2015-02-19 Thread Richard Z.
On Wed, Feb 18, 2015 at 05:27:30PM +0100, Pieren wrote:
 On Wed, Feb 18, 2015 at 2:49 PM, fly lowfligh...@googlemail.com wrote:
 
  http://wiki.openstreetmap.org/wiki/Key:aerialway#Usage
 
 -1
 
 I don't like such general keys like usage (or type) in general.

well the key is already here and perfect fit for aerialways. Argue with
the railway folks to improve or abolish it and aerialways will happilly
adopt it.

 Basically, it could be used in all tags (e.g. highway=yes +
 usage=residential). It's not because it is now spread in railways that
 we have to repeat the same mistake (how about mixed usage ? again with
 the semicolon joke ?).

unlike highways, aerialways and railway are closely very closely related 
types of tranpsort. It makes sense to reuse parts of the tagging developed 
by railways for aerialways in those cases where it is clearly decribing
the same concept.
As of mixed use, you could read the description on the page and talk page.

 An aerialway for goods is not the same as an aerialway for skiers.
 Until now, we use different values based on the different
 cabins/cars/lifts type. Perhaps instead of goods it could be
 replaced by fork or container or container_for_goods, just
 enhancing the existing list following the same principle.

For routing purposes it would be highly desirable to have tagging valid
accross all trasnportation means that are potentially relevant to routing,
including and not limitted to ship lines, railways and aerialways.
How is routing software supposed to know that some aerialway=goods are
actually taking passengers?

In principle *all* aerialways (even lifts) can be used for the transport
of goods as well.

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[Tagging] Deprecating aerialway=goods

2015-02-18 Thread Richard Z.
Hi,

suggest deprecating this particular value of aerialway as there are
much better ways to map industrial/freight lines with usage=* and 
foot=* type restrictions.

The new description is already in:

http://wiki.openstreetmap.org/wiki/Key:aerialway#Usage

discussion:
http://wiki.openstreetmap.org/wiki/Talk:Key:aerialway#Obsoleting_aerialway.3Dgoods


Richard
 

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Re: [Tagging] RFC aerialway=zip line

2015-02-17 Thread Richard Z.
On Tue, Feb 17, 2015 at 02:32:21PM +0100, fly wrote:
 Am 17.02.2015 um 12:59 schrieb Richard Z.:
  Hi,
  
  RFC for aerialway=zip line is opened:
 
 This was a typo. True is aerialway=zip_line.
 
  https://wiki.openstreetmap.org/wiki/Proposed_feature/aerialway%3Dzip_line
 
 Would not include the zip_line on playgrounds as playground=zipwire
 [1][2] is already in use and there seem to be some differences between a
 playground feature and aerialways.
 
 Otherwise you need to deprecate playground=zipwire.

ok, I am in favor of deprecating playground=zipwire. Large share of aerialway 
ziplines are part of adult playgrounds. Technically there are no universally
valid principal differences that could differentiate the two uses.
Afaics no information is lost when playground zipwires are mapped with the more
general aerialway=zip_line plus additional playground attributes.

Richard

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[Tagging] RFC aerialway=zip line

2015-02-17 Thread Richard Z.
Hi,

RFC for aerialway=zip line is opened:

http://wiki.openstreetmap.org/wiki/Proposed_feature/aerialway%3Dzip_line

Regards,
Richard

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Re: [Tagging] RFC aerialway=zip line

2015-02-17 Thread Richard Z.
On Tue, Feb 17, 2015 at 07:19:35PM +0100, Tom Pfeifer wrote:
 Richard Z. wrote on 2015-02-17 15:26:
 
 Otherwise you need to deprecate playground=zipwire.
 
 ok, I am in favor of deprecating playground=zipwire. Large share of aerialway
 ziplines are part of adult playgrounds. Technically there are no 
 universally
 valid principal differences that could differentiate the two uses.
 Afaics no information is lost when playground zipwires are mapped with the 
 more
 general aerialway=zip_line plus additional playground attributes.
 
 I see no reason for deprecating the playground feature for the sake of the 
 big one.
 
 They can coexist peacefully, works well with playground=climbingwall and
 features tagged sport=climbing.

it could coexist but there is no reason it should coexist - there is no
fundamental technical or other difference between playground=zipwire
and aerialway=zip_line. Exactly the same construction can be used on
a playground or to cross a river.
Deciding between the two would be always arbitrary and would not add any
information which could not be added with other well known tags.

Richard

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Re: [Tagging] Lifecycle concepts, REMOVED

2015-02-02 Thread Richard Z.
On Mon, Feb 02, 2015 at 04:53:03PM +0100, Janko Mihelić wrote:
 2015-01-28 19:25 GMT+01:00 Frederik Ramm frede...@remote.org:
 
 
  If there used to be a building but all that is left is a clearing in the
  forest, then the clearing will be in OSM, and not a building with a
  lifecycle tag of removed.
 
 
 But what if hikers still refer to the spot? Like Let's go to the burnt
 alpine hut, and then go left. That is a pretty important landmark, even if
 there is no sign of the hut any more. Maybe we can tag it as place=locality.

perhaps the destroyed: prefix? I would assume it should be used mostly
if there are still visible ruins but should be also ok as long as it is well 
known what it refers to.
Otherwise locality seems better.

Richard



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Re: [Tagging] Lifecycle concepts, REMOVED

2015-01-28 Thread Richard Z.
On Wed, Jan 28, 2015 at 03:22:51PM +0100, Martin Koppenhoefer wrote:
 thank you all for your comments, user:RicoZ, the creator of that page also
 agreed and has changed the description.

thank you all for the unexpected attention, the problematic text snippet
was cutpaste from [[Comparison of life cycle concepts]] where it must 
have been lurking for some time.

Its a bit early for the first April, but maybe someone will find my new
proposal for the fictional:mythical:{dead,undead}:{zombie,...} namespace
interesting.

Richard


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Re: [Tagging] waterway=wadi problem

2015-01-18 Thread Richard Z.
On Sat, Jan 17, 2015 at 12:14:53PM -0800, Tod Fitch wrote:

  
  usually you will assume it if there are ponds of open water or swamps 
  in several places along a valley.
 
 A pond/swamp/oasis/cienega in an arid or even semi-arid area is a significant 
 feature that deserve mapping in its own right. Using that to infer 
 information about a nearby or connected item seems a stretch to me.

ponds and such should be mapped. Infering an underground waterflow from them
may or may not be a stretch depending on the information that you have 
available. 
Often the underground waterflow is locally well known or can be inferred from
many other informations.

 The more I think about this issue the more I am coming to the feeling that 
 waterway=wadi ought to be deprecated and we should come up with a way of 
 further defining intermittent to distinguish between seasonal and ephemeral 
 flow patterns. Based on other responses on this thread maybe:

that would be the best thing to do.. seems like otherwise every single mapper
would use wadi in a different way.

 waterway=*
 intermittent=yes/no (default assumption of no)
 intermittent:frequency=winter/spring/summer/fall/seasonal/ephemeral/unknown 
 (default assumption of unknown)

  +intermittent:frequency=random_rare/random_frequent ?

We are still missing a definition of natural=valley afaics. There are
some old proposals but I have been told on some other mailing list that
valeys are nowadays mapped as a line natural=valley along the valley 
bottom.
So maybe we should also document this or make a proposal to that effect.

Richard


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Re: [Tagging] waterway=wadi problem

2015-01-17 Thread Richard Z.
On Sat, Jan 17, 2015 at 07:50:36AM -0800, Tod Fitch wrote:

 
 Based on where I sometimes see old wind driven pumps, I'd guess that many 
 longer (10s of miles long) washes have an underground flow.

I think so.
 
 On the other hand, in the field or using Bing imagery neither I nor any other 
 typical citizen mapper can really determine if there is unseen underground 
 water flow. So so how can that be a criteria for mapping the feature?

usually you will assume it if there are ponds of open water or swamps 
in several places along a valley.

Richard

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Re: [Tagging] waterway=wadi problem

2015-01-16 Thread Richard Z.
On Thu, Jan 15, 2015 at 11:41:26AM +0900, johnw wrote:
 I strongly disagree. A wadi is usually only an active river through very rare 
 flash flood events, and almost never any other time.  Entire biomes are 
 defined by the presence of (and situated in) a wadi. 
 

how about reading wikipedia?

Wadi (Arabic: وادي‎ wādī) is the Arabic term traditionally referring to a 
valley. In some cases, it may refer to a dry (ephemeral) riverbed that contains 
water only during times of heavy rain or simply an intermittent stream.


I consider a wadi a geologic feature. In addition to the above wadis are 
expected 
to carry underground water.

Richard


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Re: [Tagging] waterway=wadi problem

2015-01-16 Thread Richard Z.
On Fri, Jan 16, 2015 at 08:23:33AM -0800, Tod Fitch wrote:
 Since we are supposed to use British English, I decided to look up wadi in my 
 old paper edition of the Oxford English Dictionary (can we trust that more 
 than Wikipedia?):
 
 Wadi or Wady [Arabic: وادي‎ wādī] In certain Arabic speaking countries, a 
 ravine or valley which in the rainy season becomes a watercourse; the stream 
 or torrent running through such a ravine.
 

also
http://en.wiktionary.org/wiki/%D9%88%D8%A7%D8%AF%D9%8A

- valley. 

 So it seems it could either be the valley or the actual intermittent 
 watercourse. In that respect the term wash in the U.S. southwest is more 
 specific as it is only applied to the intermittent watercourse. My impression 
 from Southern California is that arroyo can be the valley/ravine as well as 
 the actual watercourse, so that might match the OED definition of wadi more 
 than wash does.

I think we should look at how wadi is used in Arabic and decide if the feature 
is
somehow interesting - and if the correct usage is compatible with prevalent 
usage
in OSM

https://www.google.de/search?q=%D9%88%D8%A7%D8%AF%D9%8Asafe=offhl=artbm=ischgbv=1sei=TlS5VKm5EOia7AbVvIDYCQ

To me it looks too much like a synonym for valley, not sure if we need that.
But maybe we need natural=valley?

Richard

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Re: [Tagging] sport= non-physical tags and the exceptions people come up with...

2014-11-24 Thread Richard Z.
sorry, didn't see your email earlier.

On Sat, Nov 08, 2014 at 09:27:03AM +0100, Andreas Goss wrote:
 The club page seems to suggest
 that club=sport + sport=cycling type tagging should be used for competitive
 sports.
 
 Which in my optinion is a bad idea, too. There is really no generel
 agreement as far as I know that club=sport is for competitive stuff
 only. I also don't think it's a good idea, because it would confuse a
 lot of people. I think subtagging makes a lot more sense.

why should everything that is remotely related to sports go under 
club=sport+sport= ?

According to the approved 
http://wiki.openstreetmap.org/wiki/Proposed_features/Club
chess has an own club=chess, as has fishing, automobile, hiking - all 
of which can be either leisure type or sport type activities. Bicycle 
was apparently added later but it makes as much or little sense as the 
other cases.
So this is not a new exception for diving.

 Tag:sport=scuba_diving as divespot has been in use for a long time already
 and
 
 http://wiki.openstreetmap.org/wiki/Proposed_features/scuba_diving2
 
 has been approved.

 It just makes no sense to allow exceptions like this. If we allow this
 then everybody will find exceptions for other sports and you won't be
 able to combine them.
 Like even now how would you tag a sport shop that sells e.g. sailing and
 scuba diving gear? You can't tag it sport=sailing;scuba_diving ... so
 what now?

http://wiki.openstreetmap.org/wiki/Key:shop list a whole range of values.
So I don't see any technical problem for example with 
shop=computer;cheese;bicycle;scuba_diving;water_sports

How would you tag this particular shop with your favorite tagging.. perhaps
shop=computer;cheese;sport + sport=bicycle;scuba_diving;water_sports ?
Imho this looks rather arbitrary, the computers sold there are probably
related to the sports offered there but treated completely differently.

That does not mean I am happy with current tagging of part-sport-part-leisure
activities such as swimming and diving.
It is broken to tag garden pools, kiddie beaches or dangerous oceans beaches 
with sport=swimming. There is no way to tag swimming routes and areas in water, 
hazardous areas etc. Most outdoor sports are in reality  outdoor 
*activities*  (whether leisure or sport) and rather bad match for tagging 
with key:sport.

Clearly in need of a sane proposal.

Richard

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Re: [Tagging] sport= non-physical tags and the exceptions people come up with...

2014-11-24 Thread Richard Z.
On Mon, Nov 24, 2014 at 02:13:07PM +0100, Martin Koppenhoefer wrote:
 2014-11-24 13:57 GMT+01:00 Richard Z. ricoz@gmail.com:
 
 
  According to the approved
  http://wiki.openstreetmap.org/wiki/Proposed_features/Club
  chess has an own club=chess, as has fishing, automobile, hiking - all
  of which can be either leisure type or sport type activities.
 
 
 
 I think club=automobile for a motorsport / racing club would not be very
 well chosen as this might really mean a lot of different things, some of
 them clearly neither leisure nor sport, e.g. the ADAC (biggest German
 automobile club, almost every 4th German is a member,
 http://en.wikipedia.org/wiki/ADAC ) does organize also some racing event,
 but is mostly seen as kind of insurance if your car breaks down (and as
 very strong political lobbyist advocating mainly individual motorized
 traffic).
 
 Documentation of the club tag is very scarse at the moment:
 http://wiki.osm.org/wiki/Key:club and I am not sure how it can be improved,
 e.g. if I wanted to write something about club=automobile, would I have to
 write to all the mappers that have put these 127 club=automobile on the
 map, to ask what they have used the tag for?

I think much the same problem exists with other club=value as well like
club=chess? Nevertheless.. you may walk by a building with a tag something
like a chess-club and if it is mapped as club=chess it is correct.
It is also fairly un-informative but we are supposed to map what we see
and not do background checks of clubs with google or wikipedia?


Richard

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Re: [Tagging] sport= non-physical tags and the exceptions people come up with...

2014-11-24 Thread Richard Z.
On Mon, Nov 24, 2014 at 02:53:32PM +0100, Colin Smale wrote:
  
 
 Let's look at the entity relations in play here. Surely a club IS an
 organisation, not a building. The club MAY USE one or more buildings,
 and MAY OWN one or more buildings. A club HAS a contact address, HAS
 members, HAS a board etc etc. So following the rules of one object,
 one set of tags, putting club=chess on a building could be considered
 to be wrong, as the building may be used by several clubs. Bearing in
 mind how some people hate multi-valued tags with semicolons, how about
 club:chess=meeting_place? Then multiple clubs could use the same
 building, each with a different role if required. Otherwise use a simple
 node (per club) within the building to indicate some relationship
 between the club and the building. 

++1

Richard

 
 Colin 
 
 On 2014-11-24 14:36, Richard Z. wrote: 
 
  On Mon, Nov 24, 2014 at 02:13:07PM +0100, Martin Koppenhoefer wrote:
  2014-11-24 13:57 GMT+01:00 Richard Z. ricoz@gmail.com: According to 
  the approved http://wiki.openstreetmap.org/wiki/Proposed_features/Club [1] 
  chess has an own club=chess, as has fishing, automobile, hiking - all of 
  which can be either leisure type or sport type activities. I think 
  club=automobile for a motorsport / racing club would not be very well 
  chosen as this might really mean a lot of different things, some of them 
  clearly neither leisure nor sport, e.g. the ADAC (biggest German 
  automobile club, almost every 4th German is a member, 
  http://en.wikipedia.org/wiki/ADAC [2] ) does organize also some racing 
  event, but is mostly seen as kind of insurance if your car breaks down (and 
  as very strong political lobbyist advocating mainly individual motorized 
  traffic). Documentation of the club tag is very scarse at the moment: 
  http://wiki.osm.org/wiki/Key:club [3] and I am not sure how it can be 
  improved, e.g. if I wanted to write something about club=automobile, would I
 have to write to all the mappers that have put these 127 club=automobile on 
 the map, to ask what they have used the tag for?
 
 I think much the same problem exists with other club=value as well like
 club=chess? Nevertheless.. you may walk by a building with a tag
 something
 like a chess-club and if it is mapped as club=chess it is correct.
 It is also fairly un-informative but we are supposed to map what we see
 and not do background checks of clubs with google or wikipedia?
 
 Richard
 
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 Links:
 --
 [1] http://wiki.openstreetmap.org/wiki/Proposed_features/Club
 [2] http://en.wikipedia.org/wiki/ADAC
 [3] http://wiki.osm.org/wiki/Key:club
 [4] https://lists.openstreetmap.org/listinfo/tagging



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Re: [Tagging] Feature Proposal - Voting - Tagging for complex junctions

2014-11-11 Thread Richard Z.
On Tue, Nov 11, 2014 at 11:08:56AM +, Lukas Sommer wrote:
 Just as a reminder: Voting is still open at
 https://wiki.openstreetmap.org/wiki/Proposed_features/Tagging_for_complex_junctions

question - key:junction has many more possible values than just
yes for the single point variant. Are those values also allowed
for junction as area?

Richard

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Re: [Tagging] place=island wiki page - coastline

2014-11-05 Thread Richard Z.
On Wed, Nov 05, 2014 at 10:22:03AM +0100, Peter Svensson wrote:
 I have seen many users doing the mistake of tagging an island inside an
 lake as natural=coastline.
 
 I suspect that the root cause in many cases might be the wiki page for
 place=island. The page encourages the use of natural=coastline without
 warnings and restrictions.
 
 Would is be possible to make natural=coastline usage more clear on
 place=island wiki page?

or - would it be possible to make coastline work for lakes as well? 

Richard

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Re: [Tagging] place=island wiki page - coastline

2014-11-05 Thread Richard Z.
On Wed, Nov 05, 2014 at 11:29:04AM +0100, Martin Koppenhoefer wrote:
 2014-11-05 11:03 GMT+01:00 Richard Z. ricoz@gmail.com:
 
   Would is be possible to make natural=coastline usage more clear on
   place=island wiki page?
 
  or - would it be possible to make coastline work for lakes as well?
 
 
 
 I recall from older discussions that mappers prefer to keep the semantics
 clean. If it is a lake, it shouldn't be tagged as coast (you could use
 shoreline?), because a coast implies a sea or an ocean. From a practical
 point of view, including big lakes into the coastline extract would be
 something useful for many people using a rendering approach similar to that
 of carto-osm, but it doesn't necessarily require to twist tagging.

how is that clean, Lake Eerie is a lake, Caspian sea is a sea, Baikal lake...

Even worse, some cross-broder water-bodies can be a lake in one language and 
sea in the other language on the other sea/lake-shore.

From a practical pov I would prefer
* no distinction at all - or
* distinction based on approximate size and complexity

Richard

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Re: [Tagging] natural=ridge vs natural=arete

2014-11-05 Thread Richard Z.
On Wed, Nov 05, 2014 at 10:01:47AM +0100, Martin Koppenhoefer wrote:
 2014-11-04 22:56 GMT+01:00 Friedrich Volkmann b...@volki.at:
 
  This discussion comes late. Both natural=ridge and natural=arete have been
  approved by voting just 2 years ago.
 
 
 
 arguably it is not too late, there are only 450 uses of arete by now (and
 17K+ ridges). Please also note that the tag natural=arete was formally
 rejected (not enough votes: http://wiki.osm.org/wiki/Proposed_features/arete
 )

after two years in the wiki where it was marked as approved and active it 
would not appear as a great idea to declare the vote for invalid based on
nitpicking formalities, how many votes were missing for approval?

Would be better to make a new proposal including details of a transition path.

Another reason I don't like current arete/ridge state is that some ridges are
very long - and they may be partially arete and ridge in different segments.
Having a way that is tagged partially as natural=ridge and partially as 
natural=arete seems like a bad idea.

Richard




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[Tagging] natural=ridge vs natural=arete

2014-11-04 Thread Richard Z.
Hi,

following some discussions on github (1) and talk-at (2) I have tried
to clarify the definition of natural=ridge in the wiki
  
http://wiki.openstreetmap.org/w/index.php?title=Tag:natural%3Dridgediff=1104725oldid=998905

Not sure if this is good enough, personaly I would prefer a single ridge 
key with additional subkeys denoting properties such as gentle,sharp, cliff
ridges.

1. https://github.com/gravitystorm/openstreetmap-carto/issues/1097
2. https://lists.openstreetmap.org/pipermail/talk-at/2014-November/007058.html

Richard

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Re: [Tagging] Pathways with steep vertical slopes, accessed via climbing chains

2014-11-04 Thread Richard Z.
On Tue, Nov 04, 2014 at 07:54:46PM +0900, johnw wrote:
 Thanks Alberto, Mike  Martin for the suggestions. I was a avid hiker in the 
 US, but this was the first time for me to encounter such assistance devices 
 myself. never knew their collective name until now. 
 
 
 Dan -  I understand about “tagging for the renderer” , but what you 
 personally consider your “creation” when you are working affects your 
 motivation. Some people here are tagging to make a complete dataset of tags, 
 some are tagging for making a good looking map via OSM’s renderer in -carto, 
 and some are using the dataset for their own project. 
 
 Personally, I want the -carto map to be the best it can be, so I consider 
 that my output. I try to give useful input in -carto and here, so I’d like it 
 tagged correctly and rendered in a nice manner. however they both get done. 

check out openandromaps.org - it does render via_ferrata and many other outdoor
features not yet rendered in mapnik.

Richard

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Re: [Tagging] natural=bay as nodes are evil

2014-10-30 Thread Richard Z.
On Thu, Oct 30, 2014 at 08:41:18AM +0100, Marc Gemis wrote:
 Could we try an example to see whether mappers agree on bay areas ? could
 you draw the Gulf of Biscay on a map ?
 
 This guy did it :
 http://1.bp.blogspot.com/_-9_Y031ZiZQ/THowBMn81dI/Ci8/inSvDDa1DC4/s1600/Golf+van+Biskaje.jpg
 
 I might have extended it a bit further to the west on the Spanish coast...

note that the big bodies of water such as the bay of biscay have been defined
by the international hydropgraphic organization, wikipedia provides the link.

Those definitions should be probably mapped, but most likely with a special tag 
rather than our natural=bay because their definition of gulf of mexico is 
obviously 
not compatible with our definition of bay (refering to the sentence fragment 
in Cuba, 
through this island to the meridian of 83°W which includes a landmas to the
definition)

Richard

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Re: [Tagging] natural=bay as nodes are evil

2014-10-29 Thread Richard Z.
On Tue, Oct 28, 2014 at 05:21:06PM +0100, moltonel 3x Combo wrote:
 On 28/10/2014, Richard Z. ricoz@gmail.com wrote:
  On Tue, Oct 28, 2014 at 11:18:43AM +0100, Martin Koppenhoefer wrote:
  2014-10-28 10:57 GMT+01:00 Richard Z. ricoz@gmail.com:
 
  The assumption is that a large bay will typically be more important than a
  smaller bay. For a good rendering you'd show only the more important bay
  names in medium zoom level and show the less important ones in higher zoom
  levels. You would use the size to decide which name to omit in case you'd
  not have space to render all of them.
 
  so to decide which label should be bigger or rendered at lower zoom level
  you would suggest to:
  * map bays as areas, with all previously mentioned issues
 
 The issues are real, but we disagree on how big they are. I'm of the
 opinion that they aren't worth fussing over, but YMMV.
 

well even if the issues were nonexistent, mapping the area of a bay seems 
to me like mapping an artificially introduced concept for which there is 
very little real world use or recognition otherwise. Also bays with very 
flat or deep geometry will result in disproportionately small areas so
mappers may feel compelled to do some ugly workarounds if the name of the
bay isn't shown as expected.

So I would say
* if there is some other reason valid to map the bay as area, do it
* something better needs to be invented for hinting the renderer.

Richard




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Re: [Tagging] Default maxspeed unit on waterways

2014-10-29 Thread Richard Z.
On Wed, Oct 29, 2014 at 02:47:48PM +, Malcolm Herring wrote:
 On 29/10/2014 14:12, Ilpo Järvinen wrote:
 I don't know about other countries, but here in Finland the water maxspeed
 signage is in km/h although knot is used for almost everything else.
 
 In UK waterways, both MPH and knots are used. Usually MPH on canals and
 knots on rivers, though even this can depend on who the navigation authority
 is and how far back in history their statutes were written.

ouch. Luckily we don't map anything in UK vs US gallons or UK vs US barrels or
tons.. or do we?

Richard

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Re: [Tagging] natural=bay as nodes are evil

2014-10-28 Thread Richard Z.
On Mon, Oct 27, 2014 at 04:28:53PM -0400, Eric Kidd wrote:

 But the key point here is that none of these official sources represent
 bays as polygons. GNIS uses a pointssomewhere in the bay. The nautical
 charts print the name somewhere in the middle of the bay. Effectively, the
 official data really is a point, plus whatever guesswork a human reader
 supplies.

+1

Also, I am reading the arguments about estimating bay area so I am curious
- when was the last time someone asked about bay area in square kilometers? 
I think it makes only sense in the context of territorial waters, fishing or 
mining rights etc. In such cases there will be an officially supplied boundary 
that can be used but will not necessarily agree with traditional extent of the 
bay.

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Re: [Tagging] natural=bay as nodes are evil

2014-10-28 Thread Richard Z.
On Tue, Oct 28, 2014 at 11:18:43AM +0100, Martin Koppenhoefer wrote:
 2014-10-28 10:57 GMT+01:00 Richard Z. ricoz@gmail.com:
 
  Also, I am reading the arguments about estimating bay area so I am curious
  - when was the last time someone asked about bay area in square kilometers?
  I think it makes only sense in the context of territorial waters, fishing
  or
  mining rights etc.
 
 
 
 The assumption is that a large bay will typically be more important than a
 smaller bay. For a good rendering you'd show only the more important bay
 names in medium zoom level and show the less important ones in higher zoom
 levels. You would use the size to decide which name to omit in case you'd
 not have space to render all of them.

so to decide which label should be bigger or rendered at lower zoom level
you would suggest to:
* map bays as areas, with all previously mentioned issues
* design a sophisticated computer algorithm to calculate the size of bays
  and derive bay importance from this

Wow.. masterpiece of mapping for the renderer I would say.

There must be easier ways of achieving this.

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Re: [Tagging] natural=bay as nodes are evil

2014-10-27 Thread Richard Z.
On Mon, Oct 27, 2014 at 10:44:01AM +0100, moltonel 3x Combo wrote:
 On 26/10/2014, Christoph Hormann chris_horm...@gmx.de wrote:
  I don't see what information is missing and cannot be easily determined
  automatically with a properly placed node that is contained in an
  area - except for the outer edge of course, which is usually
  ill-defined though as you said yourself.
 
  If you think about it a bit and do not try to place the node where you
  would place the label (which depends on the map projection anyway)
  properly placing a node for a bay is usually quite simple.  The most
  difficult are long, fjord-like bays where a way along them would be
  more appropriate.
 
 I'm really curious what your method to figure out the bay area from
 the node is, because even as a human I find that most bay nodes can
 lead to many different interpretations.

you don't. Al that the node says is somewhere there is a bay called
XXX

 A computer algorythm would
 probably get it wrong most of the time. Think back to the bays within
 bays situation. How far along the coast do this bay extend ? Are
 those two nearby nodes separate bays or overlapping ones ? 

Most of the time there is very little agreement or hard data about the 
extents and hierarchy of bay naming. Sources from different countries will
make different subdivisions. Great fun with multipolygons and even with 
perfect tagging and computer algorithm we get approximate results at best.


Richard

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Re: [Tagging] natural=bay as nodes are evil

2014-10-27 Thread Richard Z.
On Mon, Oct 27, 2014 at 12:33:48PM +0200, Ilpo Järvinen wrote:
 On Sun, 26 Oct 2014, Christoph Hormann wrote:
 
  On Sunday 26 October 2014, Mateusz Konieczny wrote:
Furthermore the outer edge of a bay, i.e. the edge that is not
coastline is usually not well defined and would require an
arbitrary cutoff.
  
   Yes, cutoff is unfortunately quite arbitrary. But node placement is
   completely arbitrary - and lacks important information.
  
  I don't see what information is missing and cannot be easily determined 
  automatically with a properly placed node that is contained in an 
  area - except for the outer edge of course, which is usually 
  ill-defined though as you said yourself.
 
 Any data consumer could quite easily, if not trivially, detect that 
 fuzzy edge in this case if it cares about it in the first place (I've
 have some trouble in figuring out a sensible use case in which it would 
 make a difference to know where the fuzzy border of a bays is).
 
 Besides, we really need to deal with object that have fuzzy borders 
 already, e.g., some of the natural=wetland object come to my mind as an 
 example. I quickly browsed through the related pages and discussions, for 
 some strange reason the fuzzy border issue seems to not have been raised 
 there at all? I suppose it's currently left solely to mappers
 discretion where to put the the edges.

http://wiki.openstreetmap.org/wiki/Proposed_features/Fuzzy

http://wiki.openstreetmap.org/wiki/List_of_proposals_regarding_landuse,_geology,_geography_and_vegetation
 (my early draft for the purpose of getting some overview over similar issues)

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Re: [Tagging] natural=bay as nodes are evil

2014-10-26 Thread Richard Z.
On Sun, Oct 26, 2014 at 05:12:20PM +0100, Mateusz Konieczny wrote:
 Please, try mapping bays as areas - not as nodes.
 
 It is really rare to see it done this way - but it is doable, see
 http://overpass-turbo.eu/s/5CQ

not practical in most cases. Almost every bay is part of a larger bay
and so forth. The borders and hierarchy are very arbitrary.

The nodes, as much as they suck give a quite realistic picture of this
fuzzy state.

Richard


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Re: [Tagging] sport= non-physical tags and the exceptions people come up with...

2014-10-23 Thread Richard Z.
On Sat, Oct 18, 2014 at 03:42:35PM +0200, Andreas Goss wrote:
 Can you please stop trying to come up with exceptions for the sport= tag?
 
 Just saw this on scuba diving:
 
  Should be used to mark a place for scuba diving, preferably as an
 attribute of natural=beach, natural=stone natural=cliff or a fitting segment
 of a coastline or lake.
 
  For dive bases or dive shops see: amenity=dive_centre or shop=scuba_diving
 
 How do you tag a store shop=sports now? How do you tag a club=sport now?
 
 See also: 
 http://wiki.openstreetmap.org/wiki/Talk:Tag:sport%3Dscuba_diving#Divespot_:_sport.3D.2A_non-physical_tag

seen your message on the talk page. The main page has apporved suggestions
how to tag dive shops and centers. For dive clubs I don` been 't see why
club=scuba_diving should not be sufficient. The club page seems to suggest
that club=sport + sport=cycling type tagging should be used for competitive
sports. 
Not seen a scuba diving competition club for a very long time. Perhaps this
should be added to the summary of the scuba_diving page?

Tag:sport=scuba_diving as divespot has been in use for a long time already
and

http://wiki.openstreetmap.org/wiki/Proposed_features/scuba_diving2

has been approved. So changing divespots to leisure=* is not a good idea at
this point.

I have added the scuba_diving:divespot=yes to the summary although it is 
not seen as obligatory in the proposal.

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Re: [Tagging] sport= non-physical tags and the exceptions people come up with...

2014-10-23 Thread Richard Z.
On Thu, Oct 23, 2014 at 01:46:45PM +0100, Philip Barnes wrote:
 I like this tagging, but as an ex-diver I do feel it needs some
 expansion.
 
 compressor=yes/no
 To indicate whether there is air available to refill tanks or not.

this would be mostly covered by
http://wiki.openstreetmap.org/wiki/Tag:shop%3Dscuba_diving
 and
http://wiki.openstreetmap.org/wiki/Tag:amenity%3Ddive_centre

What other places would you attach scuba_diving:filling* to?

 recompression_chamber=yes/no
 To indicate if there is a recompression chamber on-site.

nothing like hyperbaric chamber mapping on OSM yet?

Richard

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[Tagging] sport:scuba_diving ?

2014-10-23 Thread Richard Z.
Hi,

just noticed that http://wiki.openstreetmap.org/wiki/Tag:amenity%3Ddive_centre
has a reference to sport:scuba_diving=yes in the infobox. 
However, the reference points to 
http://wiki.openstreetmap.org/wiki/Key:sport:scuba_diving
which is redirected to Key:sport:scuba_diving

Should the stale reference to sport:scuba_diving=yes be deleted
or is it some clever plan for the future?

Richard

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[Tagging] floating or pontoon bridges?

2014-09-02 Thread Richard Z.
Hi,

the approved and currently active proposal for bridges is not
quite clear on this  - the older bridge=pontoon was not obsoleted
but a new bridge=yes+bridge:structure=floating was introduced
with the description A bridge whose load is supported by floating 
on water, rather than resting on fixed supports. Typically 
a pontoon bridge. 

https://wiki.openstreetmap.org/wiki/Proposed_features/Bridge_types

Are there floating bridges other than pontoon bridges?

Should pontoon be moved into bridge:structure and replace
floating?

Richard


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Re: [Tagging] floating or pontoon bridges?

2014-09-02 Thread Richard Z.
On Tue, Sep 02, 2014 at 04:22:34PM +0200, Martin Koppenhoefer wrote:
 2014-09-02 16:14 GMT+02:00 Volker Schmidt vosc...@gmail.com:
 
  Wikipedia does not agree with Martin:
  http://en.wikipedia.org/wiki/Pontoon_bridge
 
 
 
 it depends on the language ;-)

language problems are a disaster for us.

Yesterday looked at suspension bridges, apparently in some parts 
of the world suspension is understood to mean suspended operation,
abandoned or whatever.

Today noticed that someone tagged a rather unusual single node
object with
 bridge=yes + bridge:moveable=bascule
 https://www.openstreetmap.org/node/2301185674

- it appears that in French Pont Bascule has this meaning:
  
https://www.google.com/search?q=Pont+Basculesafe=offie=utf-8hl=engws_rd=ssltbm=isch

Something like pontoon bridge is definitely much better than 
floating bridge which may have any number of meanings for different 
people - google image search is my favorite method to look for
meanings.

Summary, I am strongly in favor of moving pontoon to bridge:structure
and forgetting about floating until someone disambiguates it from 
pontoon and writes a description for it in 12 languages.

Richard




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Re: [Tagging] Feature proposal - RFC - nudism

2014-08-31 Thread Richard Z.
On Tue, Aug 19, 2014 at 01:08:25AM +0200, Heiko Wöhrle wrote:

Hi,

added a table to the page, maybe this way it is easier to see
which additional cases should be added.

Richard

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Re: [Tagging] bridge=humpback ?

2014-08-31 Thread Richard Z.
On Mon, Aug 11, 2014 at 11:40:00PM -0400, Christopher Hoess wrote:
 On Mon, Aug 11, 2014 at 5:33 PM, Richard Z. ricoz@gmail.com wrote:
 
  On Mon, Aug 11, 2014 at 12:28:59PM -0400, Christopher Hoess wrote:
 
 
   Maintaining both bridge=movable and bridge:movable=* has at least one
   useful side effect, which I documented, for bridge geeks like me (i.e.,
  the
   people who are probably going to be adding hyper-complicated bridge
   detail); it lets you tag a formerly or planned movable span that is now
   fixed in place with bridge:movable=* but not bridge=movable. So you
   could search for bridge:movable=swing and find both working and fixed
   swing spans, but a router wouldn't treat the fixed ones as movable. (See
   here http://en.wikipedia.org/wiki/1993_Big_Bayou_Canot_train_wreck for
  the
   relevance of such spans.)
 
  This may be too subtle for many people and somewhat against the principle
  of least surprise.
 
 
 Good point. I can easily see people correcting bridge=yes to
 bridge=movable because they see the bridge:movable tag on a span. What if
 we made bridge=fixed a synonym of bridge=yes?

coming back to this because I am now looking at adapting JOSM presets for
the current bridge definitions and there it would appear that if 
bridge=yes + bridge:movable=* were considered a valid choice the dialog would
directly offer it as first choice and 99% of contributors would accidentally 
select it in places where they actually wanted to select 
   bridge=movable+bridge:movable=*
at least I do not see how to tweak the preset otherwise.

So a better combination is required for historic movable bridges before this
gets done.

Some alternatives that already were suggested or that I came up right now:

(1) bridge=fixed + bridge:movable
(2) bridge=historic_movable + bridge:movable
(3) bridge=movable + bridge:movable + 
bridge:movable_status=operational|frequent|rare|historic|suspended

I would prefer something like (3) as it offers the possibility to additional 
information about how frequently the moving mechanism is operated.
Also there could be bridge:movable_schedule in addition to this?

Richard


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Re: [Tagging] Map Features template

2014-08-27 Thread Richard Z.
On Tue, Aug 26, 2014 at 02:36:04PM -0300, John Packer wrote:
 I'm not sure that's the right mailing list for talking about this, but it's
 probably the closest
 
 Am I the only one that dislikes the Map Features templates on the wiki?
 (example: [1])
 
 I think they make it harder to edit the wiki.

which may not be that bad in some cases. When someone cares enough to 
create a template it is quite likely to be for an approved and well 
documented feature where there should not be much demand to edit it 
frequently by beginners.

 Some people like these templates because it seems they can make new tag
 values appear in non-english pages by adding them in the english page.
 But this new value appears in english, so in my opinion it kinda defeats
 the purpose of the non-english page...

not too bad, some templates have example pictures which are almost as good
as an native description.
It depends how the template is used.

However it is important that if something is changed in the English
template the other languages at least see that there was a change.

Richard


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Re: [Tagging] usage of maxspeed:practical is described as recommended on wiki

2014-08-25 Thread Richard Z.
On Mon, Aug 25, 2014 at 10:43:36AM +0200, Pieren wrote:
 I would modify the section [1] by replacing it is recommended by it
 is suggested and adding at the end a note saying that a large part of
 the community consider these two tags -smoothness and
 maxspeed:practical - too subjective.

I have rewritten it even a bit more, hope it is better now.
Also changed the old proposal page a bit.


Richard

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Re: [Tagging] Wadi vs intermittent stream?

2014-08-24 Thread Richard Z.
On Sat, Aug 23, 2014 at 02:52:41PM -0700, Tod Fitch wrote:

 So which is the preferred tagging?
 
 If waterway=wadi then I have some OSM editing to do but at least the renderer 
 should be easy. If waterway=stream, intermittent=yes then I need to get some 
 changes done by the project who's rendering database I am using.
 

Wadi is something different than a wash. While not easy to state
objectively, some hints are

* wash tends to be shorter and steeper, they often run out in 
  alluvial fans as soon as they get into flat areas. Some collect
  into intermittent rivers though.
* the wash-valley form  will be merely a deepening from erosion
  and often quite young and quickly changing ( in the order of 
  decades or hundreds of years )
* when a wash is dry there is no water flow close underneath the
  surface

* wadi will be longer, perhaps 10km or much more
* the valley is older, has gone through several geological stages 
  of riverbed formation
* even in dry seasons there will be often underground water,
  places with swamps or pools and distinct vegetation.

Richard

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[Tagging] minus or underscore in attribute values?

2014-08-23 Thread Richard Z.
Hi,

another mapper metnioned to me that it is unusual to have
attribute values with a minus, like
  bridge:structure=cable-stayed

On the other hand, it is an apporved proposal - what are the 
opinions on that?

Richard

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Re: [Tagging] usage of maxspeed:practical is described as recommended on wiki

2014-08-23 Thread Richard Z.
On Sat, Aug 23, 2014 at 09:08:08AM +0200, Mateusz Konieczny wrote:
 See https://wiki.openstreetmap.org/wiki/Talk:Key:surface#maxspeed:practical
 for proposed change

with 12000 ways already tagged maxspeed:practical and lack of alternatives
I would think twice removing any documentation.


Richard

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Re: [Tagging] usage of maxspeed:practical is described as recommended on wiki

2014-08-23 Thread Richard Z.
On Sat, Aug 23, 2014 at 10:55:15AM +0200, Mateusz Konieczny wrote:
 2014-08-23 10:48 GMT+02:00 Richard Z. ricoz@gmail.com:

 12 000 ways is really low number in this situation. Surface tag is used on
 nearly 9 million roads, number of highway=* ways crossed
 76 million. 

possibly it is used in many situations where other tags are
desperately insufficient.

No matter how bad it was considered in voting it is sometimes 
needed.

I would be in favor of improving that proposal instead of
removing all references.

Richard

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Re: [Tagging] usage of maxspeed:practical is described as recommended on wiki

2014-08-23 Thread Richard Z.
On Sat, Aug 23, 2014 at 10:33:16PM +0200, Martin Koppenhoefer wrote:
 
 
  Il giorno 23/ago/2014, alle ore 21:08, Ilpo Järvinen 
  ilpo.jarvi...@helsinki.fi ha scritto:
  
  How much of such ways that would be a candidate for maxspeed:practical
 
 
 IMHO this is a highly subjective tag that depends heavily on your driving 
 ability and the vehicle and driving comfort you expect. E.g. a moderately 
 modern battle tank can drive 70-90km/h on an open field with no road at all 
 ;-)

as I wrote on the talk page I am fully in support to update the
proposal to include modern tanks and other relevant vehicle types.

 As we are generally rejecting subjective tagging like suitability and the 
 like, this practical speed tag does not fit well in our system

It just fills a gap. Many other tags such as track type and even 
highway type (primary/secondary...) are highly subjective and used
very differently from country to country. There is no reason to think
track types are any more objective than maxspeed:practical.

Just tagged a road in the Seychelles as tertiary.. I remember it 
is a slightly difficult single lane partially paved road with 
a steep incline in some places. Even if I would remember every 
single detail of the road and use all existing tags - what can 
you deduce from that? What can routing software deduce from it?
If I add maxspeed:practical=25 everyone from anywhere in the world 
has a first idea what to expect. Even if people would argue that
it should be 15 or 30 instead of 25, all other tags taken together 
are not anywhere close to help you predict a similar value.

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Re: [Tagging] Feature proposal - RFC - nudism

2014-08-20 Thread Richard Z.
On Tue, Aug 19, 2014 at 01:08:25AM +0200, Heiko Wöhrle wrote:
  
 
 Hi everybody,
 
 i'd like to readdress an old draft from Xan, that has never been voted
 but is nevertheless in use.
 
 Please feel free to comment the slightly changed proposal:
 
 https://wiki.openstreetmap.org/wiki/Proposed_features/Nudism

Someone (you?) has removed the permissive value from the proposal and 
replaced it with
  * designated to places where nudity is officaly permitted but not prevalent 

That does not make a good replacement for me. Maybe there is room
for both values but I think it needs some tweaking..


Current proposal:
yes where nudism is officially permitted
no where it is forbidden, strongly discouraged or likely to cause trouble
customary to clothing optional places where nudity is prevalent, 
unofficial, legal status unknown or not important
designated to places where nudity is officaly permitted but not prevalent
obligatory to official nudist only places

Previous description that was in use for some time:
yes where nudism is officially permitted
no where it is forbidden, strongly discouraged or likely to cause trouble
customary to clothing optional places where nudity is prevalent, 
unofficial, legal status unknown or not important
permissive to places where nudity is permitted or tolerated but not 
prevalent, or wilderness areas where nobody cares
obligatory to official/designated nudist only places


Richard

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Re: [Tagging] Feature proposal - RFC - nudism

2014-08-20 Thread Richard Z.
On Wed, Aug 20, 2014 at 08:28:13PM +0200, Heiko Wöhrle wrote:

Hi,

 yes i changed the values because i found the differentiation between
 customary with prevalent nudity and permissive but not prevalent nudity
 difficult.
 
 But i had a mistake in my description, it should be:
 designated to places where nudity is officially permitted but not
 obligatory
 
 Hope this clarifies it... Or maybe you can point a possible differentiation
 if we keep both

we are trying to squeeze into one value something that has many more 
aspects:

* legal: allowed yes/no/unkonwn/dontcare
 obligatory  yes/no/unknown .. more values? 
* prevalence maybe widespread, customary, clothing optional
* local usage : eg permissive is fairly well understood in many places

Will one tag be enough? I think there are not so many meaningful combinations
so one tag could work but we should not be afraid to list many possible values.

Richard


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Re: [Tagging] Forest vs Wood

2014-08-20 Thread Richard Z.
On Wed, Aug 20, 2014 at 06:45:30PM +0100, Rob Nickerson wrote:
 Hi,
 
 Sorry to raise this issue again but it really does need resolving:
 
 * for ensuring good data; and
 * to prevent forest and wood being rendered as the same thing [1]
 
 Currently the descriptions in the green box on the right of the wiki page
 (and thus those that get picked up by taginfo and other software) are:
 
 Wood: Woodland with no forestry
 Forest: Managed woodland or woodland plantation.
 
 In my eyes this is pretty clear. What am I missing / why does there seem to
 be so much confusion?

landuse/landcover/natural need resolving so I would not spend too much 
energy on partial improvements of it.

Richard

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Re: [Tagging] Feature proposal - RFC - nudism

2014-08-19 Thread Richard Z.
 
 i was also thinking about that. i think it is only neccesary if a former
 nudist place is changed to a place where clothing is expected 
 

in some areas nudism is so prevalent that it is a good idea to use
nudism=no in places where it is not expected/allowed. In other areas
it would not make sense.

Another issue, while it is not related to nudism it should be somehow 
elaborated in the same go how to tag those more sexually oriented 
areas/facilities (swinger clubs etc) so that people don't abuse the 
nudism/naturism/FKK tag for this purpose.

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Re: [Tagging] Feature proposal - RFC - nudism

2014-08-19 Thread Richard Z.
On Tue, Aug 19, 2014 at 12:54:21PM +0200, Martin Koppenhoefer wrote:

 
 Maybe a more generic tag like dress_code would also catch these places? This 
 was already proposed some time ago IIRR. 

this was already discussed on some talk page - why can't I find it now? :(


 It could also be interesting sometimes if nudism is obligatory or clothing is 
 admitted as well 

it seems the proposal already took care of that?

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Re: [Tagging] bridge movable vs swing vs swinging

2014-08-19 Thread Richard Z.
On Wed, Aug 13, 2014 at 09:12:07AM +0200, Martin Vonwald wrote:
 Hi!
 
 2014-08-12 22:57 GMT+02:00 Richard Z. ricoz@gmail.com:
 
  what else can I do?
 
 
 Maybe it's time to open up a change request for the main map style? The tag
 man_made=bridge seems to be used worldwide [1] in some - more or less -
 consistent way. It provides useful data, is simple to tag, it should be
 easy to render and it solves some ugly rendering issue.
 
 Is there a place where someone could take the main style, change it and see
 the difference in rendering? So we could not only open a ticket but also
 provide a patch.

the ticket is already there:
 https://github.com/gravitystorm/openstreetmap-carto/issues/436


Richard

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Re: [Tagging] To: Tag discussion, strategy and related tools

2014-08-16 Thread Richard Z.
On Sat, Aug 16, 2014 at 05:50:06PM +0200, Martin Koppenhoefer wrote:
 
 
  Il giorno 15/ago/2014, alle ore 23:52, St Niklaas st.nikl...@live.nl ha 
  scritto:
  
  I would go for building=bridge, since a bridge is a building
 
 
 actually a bridge isn't a building according to standard terminology, it is a 
 structure. But since in osm it seems we are using building synonymously for 
 all kinds of structures it might work for us nonetheless.

it won't, building=bridge has a special meaning:
  http://wiki.openstreetmap.org/wiki/Tag:building%3Dbridge

some other values of building might work.

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Re: [Tagging] Mapping cave tunnels passable by human

2014-08-14 Thread Richard Z.
On Thu, Aug 14, 2014 at 12:31:28PM +0200, Martin Vonwald wrote:
 2014-08-14 12:25 GMT+02:00 André Pirard a.pirard.pa...@gmail.com:
 
   On 2014-08-14 11:08, Janko Mihelić wrote :
 
   Well first, tunnel=yes is obviously wrong. We need to replace this with
  cave=yes. Other than that, I have no problems with this. If a cave has two
  cave entrances, then information that they are connected by footpaths is
  valuable information.
 
  Obviously?  Regarding paths and waterways, especially ones fitted up for
  tourism, I wonder...
 
 
 Maybe not completely obvious, but I would agree with Janko. In my opinion,
 a tunnel is man-made, while a cave is not.

whether or not man-made is not the biggest problem.

The big problem with tunnel=yes or tunnel=cave is that they only would ever 
get rendered if they were also tagged as a highway or similar.
This is a big disadvantage because most caves don't have even paths.

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Re: [Tagging] bridge=humpback ?

2014-08-14 Thread Richard Z.
On Wed, Aug 13, 2014 at 11:48:35PM -0400, David K wrote:
 I support a general tag for hill crests with sufficient vertical curvature
 to introduce a visibility, grounding, or takeoff hazard.  It could be
 applied to railroad crossings, humpy bridges, or just roads traversing
 hilly terrain; all of these situations can be found in central Ohio.  Using
 this tag on a node at the crest of the hill should be acceptable, as the
 hazard may occur (potentially in multiple places) along fairly long way.

any good name for such a tag? It should be also good for dips if possible..

Richard

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Re: [Tagging] bridge movable vs swing vs swinging

2014-08-13 Thread Richard Z.
On Wed, Aug 13, 2014 at 09:12:07AM +0200, Martin Vonwald wrote:
 Hi!
 
 2014-08-12 22:57 GMT+02:00 Richard Z. ricoz@gmail.com:
 
  what else can I do?
 
 
 Maybe it's time to open up a change request for the main map style? The tag
 man_made=bridge seems to be used worldwide [1] in some - more or less -
 consistent way. It provides useful data, is simple to tag, it should be
 easy to render and it solves some ugly rendering issue.

yes I think it is about time that man_made=bridge is rendered. 

 Is there a place where someone could take the main style, change it and see
 the difference in rendering? So we could not only open a ticket but also
 provide a patch.

have no idea. 

Just noticed that some mappers resort to adding building=yes or similar to
make it render at all.

Richard

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Re: [Tagging] bridge movable vs swing vs swinging

2014-08-13 Thread Richard Z.
On Wed, Aug 13, 2014 at 09:25:33AM -0300, John Packer wrote:
  Just noticed that some mappers resort to adding building=yes or similar to
  make it render at all.
 
 Note that bridges that are buildings actually exist. [1]
 
 But adding building=* to a bridge when it's not the case would be tagging
 (incorrectly) for the renderer.

the one case I have examined is a clear case of tagging for the renderer.

I can somewhat understand it when someones local landmark bridge doesn't
show up using the correct methods.


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Re: [Tagging] bridge=humpback ?

2014-08-13 Thread Richard Z.
On Wed, Aug 13, 2014 at 06:54:11AM +0200, Mateusz Konieczny wrote:
 2014-08-11 18:28 GMT+02:00 Christopher Hoess cahoess@gmail.c
 caho...@gmail.com
 
 
  As the author of the last big redesign, I'm having trouble understanding
  some of these criticisms and would appreciate it if people would draw out
  the critique a bit so I can try to improve things.
 
 
 
 Some people consider freeform values in bridge tag as a problem and think
 that bridge tag should have only yes/no values and specific
 type of bridge should be stored in a separate tag. It is notable as these
 people maintain Default Style - see
 https://github.com/gravitystorm/openstreetmap-carto/issues/440

the result of the mentioned redesign is exactly that - there should be much
fewer freeform values now. Other subtypes of bridges (humpback, suspension, 
drawbridge, swing etc) have been moved to subtags bridge:structure and 
bridge:movable.

It would be important that those few bridge values that remained after the 
redesign are rendered.

Also rendering the outline of man_made=bridge would be a huge progress.

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Re: [Tagging] bridge=humpback ?

2014-08-12 Thread Richard Z.
On Mon, Aug 11, 2014 at 11:40:00PM -0400, Christopher Hoess wrote:
 On Mon, Aug 11, 2014 at 5:33 PM, Richard Z. ricoz@gmail.com wrote:
 
  On Mon, Aug 11, 2014 at 12:28:59PM -0400, Christopher Hoess wrote:
 
 
   Maintaining both bridge=movable and bridge:movable=* has at least one
   useful side effect, which I documented, for bridge geeks like me (i.e.,
  the
   people who are probably going to be adding hyper-complicated bridge
   detail); it lets you tag a formerly or planned movable span that is now
   fixed in place with bridge:movable=* but not bridge=movable. So you
   could search for bridge:movable=swing and find both working and fixed
   swing spans, but a router wouldn't treat the fixed ones as movable. (See
   here http://en.wikipedia.org/wiki/1993_Big_Bayou_Canot_train_wreck for
  the
   relevance of such spans.)
 
  This may be too subtle for many people and somewhat against the principle
  of least surprise.
 
 
 Good point. I can easily see people correcting bridge=yes to
 bridge=movable because they see the bridge:movable tag on a span. What if
 we made bridge=fixed a synonym of bridge=yes?

fine for me.

   bridge=covered has been mentioned now and before as possibly redundant to
   bridge=yes and covered=yes. I left it in because of this message:
http://lists.openstreetmap.org/pipermail/tagging/2013-May/013546.html
   http://lists.openstreetmap.org/pipermail/tagging/2013-May/013546.html
  which
   suggested that a bridge covered over wasn't quite the same thing as a
   covered bridge. I don't have a strong opinion on changing or keeping it
  at
   this point.
 
  I would be in favor of keeping that one but the problem is - you can't have
  covered bridge=movable or aqueduct. I have seen covered aqueducts.
 
 
 I don't think there are any extant covered movable bridges. Re. aqueducts,
 in what sense was that covered? A closed pipe? If we retain
 bridge=covered in addition to covered=yes, I think it should be
 particular to the classic covered bridge where a truss (usually) has been
 covered to keep out the weather.

not a pipe, a classic viaduct with canal, a roof and arcade style half-open
side walls. The purpose was not quite clear - not drinking water and other
parts were not covered. Should we have bridge:cover ?
 
   As long as we're simplifying possible values in bridge=,
   bridge=low_water_crossing, which is somewhat established but a bit
   awkward, could theoretically just be marked by a separate tag, maybe
   flood_prone=yes. The essential quality we're looking to convey is that
   the bridge is engineered to spend some time underwater and come out
  intact.
 
  those can also look as culverts and it would be nice to have the same
  solution
  whether it is a bridge or a culvert. I have tagged those with
  tunnel=culvert
  and ford=yes
 
 
 flood_prone might be a little better for both in that I think of a ford
 as having water more or less perennially covering the crossing, whereas a
 low water bridge, like a road dipping into an arroyo, is only covered by
 irregular intervals of high water.

the flooding can be more or less frequent. In some places that I have seen 
the flooding was manmade und thus mostly predictable, bellow a dam. 
The difference I think is how it will be used for routing, so perhaps both 
are valid alternatives.

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Re: [Tagging] bridge=humpback ?

2014-08-12 Thread Richard Z.
On Mon, Aug 11, 2014 at 09:27:45PM -0400, Christopher Hoess wrote:
 On Mon, Aug 11, 2014 at 3:33 PM, Tod Fitch t...@fitchdesign.com wrote:
 
 
 
 
  The image reminds me of a bridge, no longer open for traffic, on the old
  National Pike in Western Maryland. I can see where one might want to reduce
  speed on one of those to avoid bottoming out or becoming airborne.
 
  I think rather that bridge:structure=humpback I'd prefer
  bridge:geometry=humpback. At least something that conveys shape meaning.
  For me structure implies the design element that gives a building, bridge,
  dam, etc. its strength. In the case of the photo that would be masonry arch
  for structure.
 
 
 +1. Humpback seems mostly to be defined by the aesthetic effect and the
 potential effect on vehicles; there seems to be a popular Humpback Bridge
 on Virginia that's a covered truss with a mild humpback. I'd rather not
 dilute the more or less coherent nature of bridge:structure=, although
 better that than bridge=. Although tagging it as some sort of highway
 hazard or condition is not a bad idea either.

I was thinking maybe bridge:architecture would cover both bridge:structure
and bridge:geometry but I guess it is too late to change?

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Re: [Tagging] bridge movable vs swing vs swinging

2014-08-12 Thread Richard Z.
On Tue, Aug 12, 2014 at 12:23:35AM -0400, Christopher Hoess wrote:
 On Mon, Aug 11, 2014 at 7:57 PM, SomeoneElse li...@mail.atownsend.org.uk
 wrote:
 
  For the benefit of anyone looking at taginfo stats in this thread, it's
  worth mentioning that there's some non-survey-based editing going on:
 
  http://www.openstreetmap.org/changeset/24690099
 
 
 All bridge=drawbridge to bridge=movable bridge:movable=drawbridge. The
 bigger problem is that many of these bridges, whether originally tagged by
 local surveyors or not, are probably strictly speaking bascule bridges,
 drawbridge being used casually for any sort of movable bridge.

it was a test to see what can go wrong during such conversion. There were
quite some odd cases, like bridge=drawbridge used to draw the outline of 
the bridge.

Some time in the future I would like to review all bridge=swing and fix
at least those which are not movable at all but hanging rope bridges
instead.

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Re: [Tagging] bridge movable vs swing vs swinging

2014-08-12 Thread Richard Z.
On Tue, Aug 12, 2014 at 09:02:39AM -0300, John Packer wrote:
 Richard,
 Perhaps these cases in which the outline of the bridge was drawn is related
 to this proposal:
 http://wiki.openstreetmap.org/wiki/Proposed_features/man_made%3Dbridge

yes, I am pretty sure it was a desperate attempt to make the bridge
outline render. 
I have converted a few of them to man_made=bridge but last I looked 
they did not render anyway :(

Anyway, those that I have converted look like
* outline  - man_made_bridge
* way/calceway - bridge=movable + bridge:movable=drawbridge

Better ideas?

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Re: [Tagging] bridge movable vs swing vs swinging

2014-08-12 Thread Richard Z.
On Tue, Aug 12, 2014 at 09:06:02AM -0300, John Packer wrote:
 PS: If you removed these 'bridges as area', you probably should fix that.

I have removed the area around this one:
  https://www.openstreetmap.org/way/25397414
and filed this ticket as it did not render sanely:
  https://github.com/gravitystorm/openstreetmap-carto/issues/877

Not going to add back an outline as area of bridge=drawbridge hack 
for a 5x4m cycle path - that is one of the strangest cases of tagging
for the renderer that I have seen.

I might add man_made=bridge if it would render but I still think that
a bikepath/bridge with a width attribute should render sanely.

Richard



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Re: [Tagging] bridge movable vs swing vs swinging

2014-08-12 Thread Richard Z.
another lamentable attempt is here:

http://www.openstreetmap.org/way/241772803

what else can I do?

Richard




On Tue, Aug 12, 2014 at 09:06:02AM -0300, John Packer wrote:
 PS: If you removed these 'bridges as area', you probably should fix that.
 
 
 2014-08-12 9:02 GMT-03:00 John Packer john.pack...@gmail.com:
 
  Richard,
  Perhaps these cases in which the outline of the bridge was drawn is
  related to this proposal:
  http://wiki.openstreetmap.org/wiki/Proposed_features/man_made%3Dbridge
 
  I believe it's main purpose is to solve a known rendering problem in
  bridges.
  Nowadays, when two or more parallel ways are in a bridge/viaduct, they are
  drawn as separate bridges.
  Drawing the area of the bridge would solve that.
 
  Cheers,
  John
 
 
  2014-08-12 6:26 GMT-03:00 Richard Z. ricoz@gmail.com:
 
  On Tue, Aug 12, 2014 at 12:23:35AM -0400, Christopher Hoess wrote:
   On Mon, Aug 11, 2014 at 7:57 PM, SomeoneElse 
  li...@mail.atownsend.org.uk
   wrote:
  
For the benefit of anyone looking at taginfo stats in this thread,
  it's
worth mentioning that there's some non-survey-based editing going
  on:
   
http://www.openstreetmap.org/changeset/24690099
   
   
   All bridge=drawbridge to bridge=movable bridge:movable=drawbridge.
  The
   bigger problem is that many of these bridges, whether originally tagged
  by
   local surveyors or not, are probably strictly speaking bascule bridges,
   drawbridge being used casually for any sort of movable bridge.
 
  it was a test to see what can go wrong during such conversion. There were
  quite some odd cases, like bridge=drawbridge used to draw the outline of
  the bridge.
 
  Some time in the future I would like to review all bridge=swing and fix
  at least those which are not movable at all but hanging rope bridges
  instead.
 
  Richard
 
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Re: [Tagging] bridge=humpback ?

2014-08-11 Thread Richard Z.
On Mon, Aug 11, 2014 at 11:00:06AM +0200, Martin Koppenhoefer wrote:
 
 
  Il giorno 11/ago/2014, alle ore 10:30, Philip Barnes p...@trigpoint.me.uk 
  ha scritto:
  
  I do not like the idea of bridge=movable. whilst true, it is only useful to 
  routers and looses the diversity of OSM, we should not dumb-down tagging 
  just
  because it is not universally understood  Movable in itself could mean many 
  things, lifting, swing or even transporter.
 
 
 +1, I believe the redesign of bridge tagging, whilst being an improvement 
 because of the introduced sub keys for some properties, still lacks some 
 consistency and logics for some cases, one of them being movable which I'd 
 not set as primary bridge value.

I would also think that bridge=movable is not needed given bridge:movable.
But is it worth the trouble changing it? I am not against it... but enough
work around:)
Bridge=trestle would be a much clearer candidate to remove from the primary 
values table.. whoever knows how it got there.

What is imho much more important is to decide that the primary bridge values 
should not be further extended without *very* good reasons and the existing
system used as far as possible.
Currently http://wiki.openstreetmap.org/wiki/Key:bridge#Values seems suggests
that anyone should freely invent his own types (bottom of table).

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Re: [Tagging] bridge=humpback ?

2014-08-11 Thread Richard Z.
On Mon, Aug 11, 2014 at 12:40:57AM +0200, Colin Smale wrote:
Hi,
 
 http://farm2.static.flickr.com/1263/1186115057_7f88a4aaed_o.jpg 

looks like a landmark or tourist attraction to me and a narrow single 
lane bridge. The speed limiting factor on this particular bridge might 
be that you don't see far enough?

But using bridge=humpback to imply a hazard may not be such a good 
idea, will American tourists be familiar with the dangers of humpback 
bridges?

Instead we could describe the hazards as visibility, bump, dip, and 
narrow single lane with higher chances of universal usability.

We could also use reasonable_max_speed (per vehicle category) or
do both.

Hence I am now inclined to tag humpback bridges as 
  bridge=yes + bridge:structure=humpback

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Re: [Tagging] bridge=humpback ?

2014-08-11 Thread Richard Z.
On Mon, Aug 11, 2014 at 12:28:59PM -0400, Christopher Hoess wrote:

Hi,

 As the author of the last big redesign, I'm having trouble understanding
 some of these criticisms and would appreciate it if people would draw out
 the critique a bit so I can try to improve things.

my criticism was limited to the slight redundancy of 
   bridge=movable + bridge:movable

One minor issues with the description, Key:bridge:structure says describe 
the load-bearing architecture of individual bridge spans. This meaning of 
span may not be well known for folks who are not bridge experts and not 
native english speakers. Perhaps sections or segments could be added in 
brackets for explanation. 

 I don't see how using bridge=movable constitutes dumb-down tagging; all
 I've done is move the many different possible values to bridge:movable. I
 think this is an excellent arrangement, because movable bridges seem to
 stimulate engineering ingenuity: there are many different types, and I do
 not feel confident that we can build a comprehensive list of them. In
 practice, we will need to accept occasional user-defined values for types
 of movable bridges, but we can't show bridge rendering for an open-ended
 set of values (bridge=*) because many user-defined values indicate the
 bridge is not functional. Moving them into this subtag seems like an
 excellent way to balance tagging expressiveness with usability.

agree.
 
 Maintaining both bridge=movable and bridge:movable=* has at least one
 useful side effect, which I documented, for bridge geeks like me (i.e., the
 people who are probably going to be adding hyper-complicated bridge
 detail); it lets you tag a formerly or planned movable span that is now
 fixed in place with bridge:movable=* but not bridge=movable. So you
 could search for bridge:movable=swing and find both working and fixed
 swing spans, but a router wouldn't treat the fixed ones as movable. (See
 here http://en.wikipedia.org/wiki/1993_Big_Bayou_Canot_train_wreck for the
 relevance of such spans.)

This may be too subtle for many people and somewhat against the principle
of least surprise.
 
 bridge=aqueduct has longstanding usage, but could probably be dispensed
 with. The fact that the bridge is applied to a canal or waterway tells us
 it's an aqueduct. (For the same reason, we don't need an explicit tag for
 footbridges; that's determined by the way crossing it plus restrictions.)
 The main argument I can think of for retaining it would be drained
 aqueducts from defunct canals, which there's no *de jure* official way to
 tag. Any thoughts from frequent waterway/canal mappers?

it is probably good to keep that one as I have seen plenty of defunct canals
going over aqueducts.


 bridge=cantilever, trestle, and viaduct form a natural group of some kind.
 I don't have a single word to easily sum them up, but they all have to do
 with the way in which multiple spans of the bridge are arranged and
 supported. Note that as far as I know, in both American and British
 English, the term viaduct can be applied to both road and railroad
 bridges; it isn't confined to roads. They can't be parceled into
 bridge:structure because they conflict with the ability to specify the
 individual spans (e.g., an arch viaduct), but these would be a good target
 for moving into a subtag. bridge=viaduct has a lot of existing uses
 because of renderer support.

the trestle is something that doesn't fit into bridge:structure well, but
bridge=trestle doesn't describe it terribly well either, so some subtag
describing the average width and technical details might be a good idea.

 
 bridge=covered has been mentioned now and before as possibly redundant to
 bridge=yes and covered=yes. I left it in because of this message:
  http://lists.openstreetmap.org/pipermail/tagging/2013-May/013546.html
 http://lists.openstreetmap.org/pipermail/tagging/2013-May/013546.html which
 suggested that a bridge covered over wasn't quite the same thing as a
 covered bridge. I don't have a strong opinion on changing or keeping it at
 this point.

I would be in favor of keeping that one but the problem is - you can't have
covered bridge=movable or aqueduct. I have seen covered aqueducts.
 
 As long as we're simplifying possible values in bridge=,
 bridge=low_water_crossing, which is somewhat established but a bit
 awkward, could theoretically just be marked by a separate tag, maybe
 flood_prone=yes. The essential quality we're looking to convey is that
 the bridge is engineered to spend some time underwater and come out intact.

those can also look as culverts and it would be nice to have the same solution
whether it is a bridge or a culvert. I have tagged those with tunnel=culvert
and ford=yes

Richard

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Re: [Tagging] bridge=humpback ?

2014-08-10 Thread Richard Z.
Hi,

lots of the national wikis refer to bridge=humpback which is missing
in the English wiki, how to add it?

Also, should the key:bridge pages really encourage user defined bridge
values?

Richard

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