Re: [Tagging] what does maxheight=none mean?

2014-10-29 Thread Pieren
On Mon, Oct 27, 2014 at 8:21 PM, Friedrich Volkmann b...@volki.at wrote:

 (...) But when we see nothing, it's plain wrong to add something to the 
 database.

But it's a common practice today in OSM. It seems you missed the long
discussions about noname=yes or oneway=no. Such tags don't say
here is nothing. It says that someone went on place and checked that
the restriction does not apply. Otherwise, we cannot differenciate
surveyed locations and missing information in OSM.

Btw, I'm also in favour of maxheight=unsigned which is for me less
controversial than maxheight=none (even as a non native English
speaker). Although maxheight is the legal value (like all tags in
the category access), none is suggesting that there is no height
limit at all.

Pieren

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Re: [Tagging] what does maxheight=none mean?

2014-10-29 Thread Martin Koppenhoefer
2014-10-29 13:08 GMT+01:00 Pieren pier...@gmail.com:

 Btw, I'm also in favour of maxheight=unsigned



maybe unmarked would be more English than unsigned?
Alternatively it could also be default?

cheers,
Martin
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Re: [Tagging] what does maxheight=none mean?

2014-10-29 Thread Marc Gemis
why would we treat maxheight different from maxspeed ?

I thought the consensus for maxspeed was to tag the maxspeed explicitly and
the reason in source:maxspeed

So why can't we fill in the default value for unsigned bridges explicitly ,
so e.g. maxheight=4 and add source:maxheight=Country:default ?


regards

m

p.s. I'm aware of the history of source:maxspeed and that not everybody is
happy with this tag.

On Wed, Oct 29, 2014 at 1:28 PM, Martin Koppenhoefer dieterdre...@gmail.com
 wrote:


 2014-10-29 13:08 GMT+01:00 Pieren pier...@gmail.com:

 Btw, I'm also in favour of maxheight=unsigned



 maybe unmarked would be more English than unsigned?
 Alternatively it could also be default?

 cheers,
 Martin

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Re: [Tagging] what does maxheight=none mean?

2014-10-29 Thread Pieren
On Wed, Oct 29, 2014 at 1:51 PM, Marc Gemis marc.ge...@gmail.com wrote:

 So why can't we fill in the default value for unsigned bridges explicitly ,
 so e.g. maxheight=4 and add source:maxheight=Country:default ?

I don't know the max height in my country. And probably most of the
contributors don't. So the simple maxheight=unsigned or unmarked
or whatever is easier for the average contributor.
What you suggest is possible and could be automated. But it could be
done by the data consumers as well.

Pieren

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Re: [Tagging] what does maxheight=none mean?

2014-10-29 Thread Tom Pfeifer

Then it happens that a 3 m bridge that for some reason has no sign gets a 4 m 
tag.

maxheight is different from maxspeed in some aspects.

Marc Gemis wrote on 2014-10-29 13:51:

why would we treat maxheight different from maxspeed ?

I thought the consensus for maxspeed was to tag the maxspeed explicitly and the 
reason in source:maxspeed

So why can't we fill in the default value for unsigned bridges explicitly , so e.g. 
maxheight=4 and add source:maxheight=Country:default ?


regards

m

p.s. I'm aware of the history of source:maxspeed and that not everybody is 
happy with this tag.

On Wed, Oct 29, 2014 at 1:28 PM, Martin Koppenhoefer dieterdre...@gmail.com 
mailto:dieterdre...@gmail.com wrote:


2014-10-29 13:08 GMT+01:00 Pieren pier...@gmail.com 
mailto:pier...@gmail.com:

Btw, I'm also in favour of maxheight=unsigned



maybe unmarked would be more English than unsigned?
Alternatively it could also be default?

cheers,
Martin




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Re: [Tagging] what does maxheight=none mean?

2014-10-29 Thread Martin Koppenhoefer
2014-10-29 13:51 GMT+01:00 Marc Gemis marc.ge...@gmail.com:

 why would we treat maxheight different from maxspeed ?

 I thought the consensus for maxspeed was to tag the maxspeed explicitly
 and the reason in source:maxspeed

 So why can't we fill in the default value for unsigned bridges explicitly
 , so e.g. maxheight=4 and add source:maxheight=Country:default ?



I think maxspeed and maxheight are different, as maxspeed is defined also
when there is no sign (default maxspeed), but maxheight is not defined when
there is no sign. There are still considerations to keep in mind (like
vehicle classes and their max height) to infer for practical reasons some
default maxheight, but that isn't exactly the same as default maxspeeds.

Still I agree, we could tag this derived maxheight value and add a
maxheight:source to say it is implicit.

cheers,
Martin
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Re: [Tagging] what does maxheight=none mean?

2014-10-29 Thread Martin Koppenhoefer
2014-10-29 14:01 GMT+01:00 Tom Pfeifer t.pfei...@computer.org:

 Then it happens that a 3 m bridge that for some reason has no sign gets a
 4 m tag.




examples? What is some reason?

cheers,
Martin
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[Tagging] Default maxspeed unit on waterways

2014-10-29 Thread Pieren
Hi,

Currently, le wiki ([1]) suggests that maxspeed has to specify the
unit knots when it's not km/h. But knot is the unit used worldwide
on waterways. Why should we add something obvious on all waterway
elements ? Could we suggest that the default unit for maxspeed on
waterways is knot and the default km/h remains for highways and
railways ?

Pieren

[1] http://wiki.openstreetmap.org/wiki/Key:maxspeed

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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] what does maxheight=none mean?

2014-10-29 Thread Marc Gemis
In Belgium the maximum height for a vehicle is 4m (on all roads, whether
there is a bridge or not). So without sign a bridge should allow vehicles
under the maximum height to pass.
There are exceptions, which requires a special permit (pubic transport).
Then the maximum height is 4.4m meters.
I assume that for exceptional goods, which also requires special
permission, the height can be even higher.

This is part of the traffic code, which each citizen with a driving license
should know. Will this be so much different in other countries ?

Thus the tagging should indicate that without sign, the bridge allows at
least vehicles with a height less than the legal maximum for vehicles in
that country.


regards

m

On Wed, Oct 29, 2014 at 2:05 PM, Martin Koppenhoefer dieterdre...@gmail.com
 wrote:


 2014-10-29 14:01 GMT+01:00 Tom Pfeifer t.pfei...@computer.org:

 Then it happens that a 3 m bridge that for some reason has no sign gets a
 4 m tag.




 examples? What is some reason?

 cheers,
 Martin

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

2014-10-29 Thread Martin Koppenhoefer
2014-10-29 14:40 GMT+01:00 Richard Z. ricoz@gmail.com:

 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.




disproportionate to what? water depth really doesn't matter at all in this
context (IMHO)

cheers,
Martin
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Re: [Tagging] what does maxheight=none mean?

2014-10-29 Thread Tom Pfeifer

Martin Koppenhoefer wrote on 2014-10-29 14:05:


2014-10-29 14:01 GMT+01:00 Tom Pfeifer:

Then it happens that a 3 m bridge that for some reason has no sign gets a 4 
m tag.
examples? What is some reason?


- rural track never had sign posted
- neglected road, sign fallen off
- unsigned road gained hight due to maintenance

While maxspeed is a legal limit, maxheight is derived from a
physical limitation.

Bridges can also be much higher than 4 m, but height not known,
so why should I tag it 4 m. I'd prefer to tag what I see,
i.e. I see no sign, I tag unsigned/unmarked/un-whatever-we-conclude.

Keep it simple.

tom



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Re: [Tagging] Default maxspeed unit on waterways

2014-10-29 Thread Tom Pfeifer

km/h is derived, at least with an integer multiple of seconds,
from SI units. mph and knots are not. I would prefer to keep
one default unit per tag, consistently, everything else leads
to confusion.

Pieren wrote on 2014-10-29 14:14:

Hi,

Currently, le wiki ([1]) suggests that maxspeed has to specify the
unit knots when it's not km/h. But knot is the unit used worldwide
on waterways. Why should we add something obvious on all waterway
elements ? Could we suggest that the default unit for maxspeed on
waterways is knot and the default km/h remains for highways and
railways ?

Pieren

[1] http://wiki.openstreetmap.org/wiki/Key:maxspeed

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Re: [Tagging] Default maxspeed unit on waterways

2014-10-29 Thread Pieren
On Wed, Oct 29, 2014 at 2:52 PM, Tom Pfeifer t.pfei...@computer.org wrote:
 km/h is derived, at least with an integer multiple of seconds,
 from SI units. mph and knots are not. I would prefer to keep
 one default unit per tag, consistently, everything else leads
 to confusion.

What is leading to confusion is to suggest that km/h is the default
unit for waterway speed when  knot is in use everywhere. Please think
as a contributor, not as QA programmer or data consumer (it's easy to
check if the speed limit belongs to a waterway or not).
And The knot is a non-SI unit that is accepted for use with the SI
(https://en.wikipedia.org/wiki/Knot_%28unit%29)

Pieren

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

2014-10-29 Thread Janko Mihelić
2014-10-29 14:46 GMT+01:00 Martin Koppenhoefer dieterdre...@gmail.com:


 2014-10-29 14:40 GMT+01:00 Richard Z. ricoz@gmail.com:

 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.


 disproportionate to what? water depth really doesn't matter at all in this
 context (IMHO)


I think he was talking about bay shapes:

http://i.imgur.com/AMigrSf.png


What if we mapped bays on coastlines, and then the renderer can connect the
ending points with a straight line or a curve. And we can combine that with
a node which can be something like place=country (a rendering hint).

Janko
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Re: [Tagging] Default maxspeed unit on waterways

2014-10-29 Thread Dan S
2014-10-29 14:07 GMT+00:00 Pieren pier...@gmail.com:
 On Wed, Oct 29, 2014 at 2:52 PM, Tom Pfeifer t.pfei...@computer.org wrote:
 km/h is derived, at least with an integer multiple of seconds,
 from SI units. mph and knots are not. I would prefer to keep
 one default unit per tag, consistently, everything else leads
 to confusion.

 What is leading to confusion is to suggest that km/h is the default
 unit for waterway speed when  knot is in use everywhere.

Pieren, is there an example of confusion actually being caused?


 Please think
 as a contributor, not as QA programmer or data consumer (it's easy to
 check if the speed limit belongs to a waterway or not).

It's easy to think up potential for confusion whichever way we go on
this. Thinking as a contributor, the editing interfaces should make it
clear which units the user is stating/implying - as iD does, for
example. I definitely sympathise with Tom's reasoning for one unit per
tag, so I'd suggest there would need to be a strong case for this
mixed-units approach...

Dan


 And The knot is a non-SI unit that is accepted for use with the SI
 (https://en.wikipedia.org/wiki/Knot_%28unit%29)

 Pieren

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Re: [Tagging] Default maxspeed unit on waterways

2014-10-29 Thread Malcolm Herring

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.



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Re: [Tagging] Default maxspeed unit on waterways

2014-10-29 Thread Pieren
On Wed, Oct 29, 2014 at 3:47 PM, Malcolm Herring
malcolm.herr...@btinternet.com 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.

Okay, if the unit is not generalized, then my idea doesn't make sens.
Sorry for the noise.

Pieren

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Re: [Tagging] Default maxspeed unit on waterways

2014-10-29 Thread Richard Welty

On 10/29/14 10:47 AM, 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.

i understand where this is coming from, but i think we need
to stick to a single units default for a given tag, and those should
probably be in SI units. it's not exactly killing me to have to add
mph when i tag maxspeed in the US.

richard

--
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 OpenStreetMap - PostgreSQL - Linux
 Java - Web Applications - Search


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

2014-10-29 Thread moltonel 3x Combo
On 28/10/2014, Christoph Hormann chris_horm...@gmx.de wrote:
 On Tuesday 28 October 2014, moltonel 3x Combo wrote:
 I admit I don't fully understand how your algorythm works. I can't
 imagine how you reduce everything to nodes and still retain
 information about orientation and curves. Can you change your
 rendering to display the infered polygons instead of the name ?

 I do not infer any areas, i just generate curves (splines) based on the
 nodes and the surrounding coastlines and place the text along them.

Hum, so that's only usable for label rendering, not geocoding :/

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Re: [Tagging] what does maxheight=none mean?

2014-10-29 Thread John F. Eldredge
An example would be where the sign had fallen off, or been stolen by vandals.


On October 29, 2014 8:05:10 AM CDT, Martin Koppenhoefer 
dieterdre...@gmail.com wrote:
2014-10-29 14:01 GMT+01:00 Tom Pfeifer t.pfei...@computer.org:

 Then it happens that a 3 m bridge that for some reason has no sign
gets a
 4 m tag.




examples? What is some reason?

cheers,
Martin




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

2014-10-29 Thread moltonel 3x Combo
On 29/10/2014, Richard Z. ricoz@gmail.com wrote:
 On Tue, Oct 28, 2014 at 05:21:06PM +0100, moltonel 3x Combo wrote:
 On 28/10/2014, Richard Z. ricoz@gmail.com wrote:
 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.

Huh ? Forget about maps and osm for a moment. A bay is a body of
water mostly surrounded by land. You're in a bay, not at a bay.
It has a size, it's not a point in space with a buoy marking the spot.
It's an area.

The fact that a lot of sources have simplified it down to a point is
an entirely different issue. But there's no reason that, with modern
tools and manpower, we can't make a better job than those historical
sources. And remember that when you see a rendered bay label, you
don't actually know wether the source (wether it's some vector data or
an idea in the sailor's brain) was an area or a point to begin with.

 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.

Disproportionate compared to what ? And fairly flat coastlines are a
good example of cases that are tricky for algorythms, where the human
mapper can probably make a better decision.

 So I would say
 * if there is some other reason valid to map the bay as area, do it

pros:
 - bays are areas in real life
 - it makes geocoding trivial
 - it makes knowing which bays to render preferably easy (bigger bays first)
 - it enables representing nested bays
 - it is deterministic, as opposed to relying on a heuristic algorythm
cons:
 - relations are harder to work with than nodes
 - the extent of bays is usually fuzzy; nodes make that fuzzyness obvious
 - most of the existing data (osm and potential imports) are nodes

YMMV, those are reasons enough for me.

 * something better needs to be invented for hinting the renderer.

It's not just the renderer, I actually think that the geocoding
usacase is more important. And geocoding requires an area, wether it
is provided in readily-usable form as osm data, or by a
heuristics-based algorythm that infers it from a node.

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Re: [Tagging] what does maxheight=none mean?

2014-10-29 Thread moltonel 3x Combo
On 29/10/2014, Pieren pier...@gmail.com wrote:
 On Mon, Oct 27, 2014 at 8:21 PM, Friedrich Volkmann b...@volki.at wrote:

 (...) But when we see nothing, it's plain wrong to add something to the
 database.

 But it's a common practice today in OSM. It seems you missed the long
 discussions about noname=yes or oneway=no. Such tags don't say
 here is nothing. It says that someone went on place and checked that
 the restriction does not apply. Otherwise, we cannot differenciate
 surveyed locations and missing information in OSM.

The comparision doesn't apply well. no is a valid value for the
oneway key. noname uses a different key than the one it relates to
(instead of using name=none or name=unsigned). And both tags are
definitive, whereas maxheight:signed=no (or whatever) is just
waiting for a better tooled or experienced mapper to do the survey.

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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] Default maxspeed unit on waterways

2014-10-29 Thread SomeoneElse

On 29/10/2014 19:48, Richard Z. wrote:
ouch. Luckily we don't map anything in UK vs US gallons or UK vs US 
barrels or tons.. or do we?


US tons, certainly (and it has caught mappers out in the past when 
they've been looking for rogue values to correct).


The UK uses (generally) metric measures for maxweights, a combination of 
both UK and metric for heights, and UK motorways have distances on signs 
in miles and what people from the USA would call mile markers in 
kilometers.  Confused, you will be...


Cheers,

Andy


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Re: [Tagging] Release openstreetmap-carto v2.23.0

2014-10-29 Thread Frederik Ramm
Hi,

On 10/29/2014 09:34 PM, Matthijs Melissen wrote:
 * The tag tourism=bed_and_breakfast is no longer rendered - please use
 tourism=guest_house instead.

Well - it might be your decision what to render and what not, but you
shouldn't go so far as to request that people misrepresent reality in
their mapping.

A private residence where a single bedroom is made available to tourists
is certainly no guest house and shouldn't be tagged as such! It is,
and remains, a bed_and_breakfast.

Bye
Frederik

-- 
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Re: [Tagging] [OSM-talk] Release openstreetmap-carto v2.23.0

2014-10-29 Thread Mateusz Konieczny
http://wiki.openstreetmap.org/wiki/Tag:tourism%3Dguest_house as currently
defined
fits private residence where a single bedroom is made available to
tourists.

It is even mentioned - ranging from purpose-built guest houses
to family-based BedBreakfast

2014-10-29 21:55 GMT+01:00 Frederik Ramm frede...@remote.org:

 Hi,

 On 10/29/2014 09:34 PM, Matthijs Melissen wrote:
  * The tag tourism=bed_and_breakfast is no longer rendered - please use
  tourism=guest_house instead.

 Well - it might be your decision what to render and what not, but you
 shouldn't go so far as to request that people misrepresent reality in
 their mapping.

 A private residence where a single bedroom is made available to tourists
 is certainly no guest house and shouldn't be tagged as such! It is,
 and remains, a bed_and_breakfast.

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Re: [Tagging] Release openstreetmap-carto v2.23.0

2014-10-29 Thread Dan S
Frederik,

The tagging and the wiki have been that way for many years.
http://wiki.openstreetmap.org/wiki/Bed_and_breakfast

I share your discomfort, since I think of a BB as a different thing
from a guesthouse. But over the years I've ended up using this tagging
since it's documented and appears to be how people tag. I guess it's
not Matthijs who made this decision...

Best
Dan

2014-10-29 20:55 GMT+00:00 Frederik Ramm frede...@remote.org:
 Hi,

 On 10/29/2014 09:34 PM, Matthijs Melissen wrote:
 * The tag tourism=bed_and_breakfast is no longer rendered - please use
 tourism=guest_house instead.

 Well - it might be your decision what to render and what not, but you
 shouldn't go so far as to request that people misrepresent reality in
 their mapping.

 A private residence where a single bedroom is made available to tourists
 is certainly no guest house and shouldn't be tagged as such! It is,
 and remains, a bed_and_breakfast.

 Bye
 Frederik

 --
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Re: [Tagging] Default maxspeed unit on waterways

2014-10-29 Thread Paul Johnson
On Wed, Oct 29, 2014 at 8:14 AM, Pieren pier...@gmail.com wrote:

 Hi,

 Currently, le wiki ([1]) suggests that maxspeed has to specify the
 unit knots when it's not km/h. But knot is the unit used worldwide
 on waterways.  Why should we add something obvious on all waterway
 elements?


Except it totally isn't, especially inland, where countries often use the
same units as on land.  Even though the Columbia River's rivermarks are
denominated in nautical miles upstream of the Columbia Bar (the area
roughly from the end of the jetties into the Pacific Ocean at it's delta to
roughly once you get past the riprap jetty that US 101 travels three miles
into the Columbia River on before rising over the last mile on the
Astoria-Megler Bridge), once you get past the Astoria Port of Entry area
for foreign ships entering inland waters, speeds posted on buoys changes
from knots to MPH.


 Could we suggest that the default unit for maxspeed on
 waterways is knot and the default km/h remains for highways and
 railways ?


 Yeah, how about no, let's keep maxspeed the default on km/h for the sake
of the vast majority of elements that use maxspeed as a legal restriction.
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Re: [Tagging] Release openstreetmap-carto v2.23.0

2014-10-29 Thread Matthijs Melissen
On 29 October 2014 20:59, Dan S danstowell+...@gmail.com wrote:
 I guess it's not Matthijs who made this decision...

That's correct. See
https://github.com/gravitystorm/openstreetmap-carto/pull/695 for more
details.

-- Matthijs

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Re: [Tagging] Release openstreetmap-carto v2.23.0

2014-10-29 Thread Christoph Hormann
On Wednesday 29 October 2014, Dan S wrote:

 The tagging and the wiki have been that way for many years.
 http://wiki.openstreetmap.org/wiki/Bed_and_breakfast

Well - not exactly, this redirect as well as the removal of 
tourism=bed_and_breakfast as an alternative from 
http://wiki.openstreetmap.org/wiki/Tag:tourism%3Dguest_house has been 
done about a year ago.  There is 'Deprecated' noted on 

http://wiki.openstreetmap.org/wiki/Tag%3Atourism%3Dbed_and_breakfast

but without there having been a proposal to deprecate it.

tourism=bed_and_breakfast exists 609 times at the moment, 
guest_house=bed_and_breakfast 154 times.

Generally given the huge influence the standard style has on mapping and 
that a lot of people articulated the need to differenciate between BB 
and larger guest houses in discussions i agree this change indeed is 
probably not to the better.

-- 
Christoph Hormann
http://www.imagico.de/

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