Re: [Tagging] Block names (vs street names) in Brasilia

2012-04-25 Thread Elena ``of Valhalla''
On 2012-04-24 at 21:46:35 -0400, Nathan Edgars II wrote:
 On 4/24/2012 2:13 PM, Alex Barth wrote:
 Pieren - thanks for pointing out that area=yes is highway only. How could 
 the documentation for it be clearer [1]?
 It's not highway only. For example, it can be used on
 railway=platform: http://www.openstreetmap.org/browse/way/94063273
 or man_made=pier: http://www.openstreetmap.org/browse/way/71124853

but in both cases the meaning is contrary to the default for 
the main tag, this feature has not been described by tracing 
its center line, but its perimeter

-- 
Elena ``of Valhalla''


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[Tagging] area=yes on polygones (was Block names)

2012-04-25 Thread Pieren
On Wed, Apr 25, 2012 at 3:46 AM, Nathan Edgars II nerou...@gmail.com wrote:

 It's not highway only. For example, it can be used on railway=platform:
 http://www.openstreetmap.org/browse/way/94063273
 or man_made=pier: http://www.openstreetmap.org/browse/way/71124853

Thanks for pointing that out. I see that silently, the meaning of the
tag area has been modified by certain people on the wiki. I modified
the wiki about platform:
http://wiki.openstreetmap.org/wiki/Tag:railway%3Dplatform

We cannot accept that the tag area=yes is required for all polygons.
This has never been the case. It was introduced only when the main tag
about a closed loop was non-deterministic (tracing a centre line or a
perimeter). We don't do that for car parks, buildings, etc. I don't
see why we should create an exception for railway platforms.

Pieren

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Re: [Tagging] area=yes on polygones (was Block names)

2012-04-25 Thread Martin Vonwald
The german article still has the recommendation of adding area=yes.

One of the biggest problems in the wiki is the fact, that very often
articles in different languages are not really translations, but
different articles.

As the tag railway=platform is applicable to areas as well, according
to articles in all languages, and therefore area=yes shouldn't be
necessary on closed ways, I will update this note in the german
article in accordance with the updated english article.

Martin

2012/4/25 Pieren pier...@gmail.com:
 On Wed, Apr 25, 2012 at 3:46 AM, Nathan Edgars II nerou...@gmail.com wrote:

 It's not highway only. For example, it can be used on railway=platform:
 http://www.openstreetmap.org/browse/way/94063273
 or man_made=pier: http://www.openstreetmap.org/browse/way/71124853

 Thanks for pointing that out. I see that silently, the meaning of the
 tag area has been modified by certain people on the wiki. I modified
 the wiki about platform:
 http://wiki.openstreetmap.org/wiki/Tag:railway%3Dplatform

 We cannot accept that the tag area=yes is required for all polygons.
 This has never been the case. It was introduced only when the main tag
 about a closed loop was non-deterministic (tracing a centre line or a
 perimeter). We don't do that for car parks, buildings, etc. I don't
 see why we should create an exception for railway platforms.

 Pieren

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[Tagging] OSMI layers in JOSM

2012-04-25 Thread Martin Vonwald
Hi all!

I'm trying to view the OSMI layers in JOSM. The all-knowing,
all-seeing trash heap pointed me to this (german) article:
http://forum.openstreetmap.org/viewtopic.php?id=9315

There it is recommended to use the following link in JOSM:
http://tools.geofabrik.de/osmi/view/routing/wxs?REQUEST=GetMapSERVICE=wmsVERSION=1.1.1FORMAT=image/pngSRS=EPSG:4326STYLES=LAYERS=unconnected_minor1,unconnected_minor2,unconnected_minor5,unconnected_major1,unconnected_major2,unconnected_major5;

This works like a charm, but with the limitations, that one has to
adjust the resolution manually. Also I seem to be unable to get this
layer transparent. In the article one wrote to add TRANSPARENT=TRUE to
the link, but I can't get this working.

Has anyone a hint for me how to get this layer transparent? Is there
any possibility to autoadjust the resolution?

Martin

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Re: [Tagging] area=yes on polygones (was Block names)

2012-04-25 Thread Nathan Edgars II

On 4/25/2012 3:39 AM, Pieren wrote:

On Wed, Apr 25, 2012 at 3:46 AM, Nathan Edgars IInerou...@gmail.com  wrote:


It's not highway only. For example, it can be used on railway=platform:
http://www.openstreetmap.org/browse/way/94063273
or man_made=pier: http://www.openstreetmap.org/browse/way/71124853


Thanks for pointing that out. I see that silently, the meaning of the
tag area has been modified by certain people on the wiki. I modified
the wiki about platform:
http://wiki.openstreetmap.org/wiki/Tag:railway%3Dplatform

We cannot accept that the tag area=yes is required for all polygons.
This has never been the case. It was introduced only when the main tag
about a closed loop was non-deterministic (tracing a centre line or a
perimeter). We don't do that for car parks, buildings, etc. I don't
see why we should create an exception for railway platforms.


Because a railway platform is usually drawn as a single line (as is a 
pier). Omitting area=yes gives a hole in the middle.


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Re: [Tagging] area=yes on polygones (was Block names)

2012-04-25 Thread Pieren
On Wed, Apr 25, 2012 at 10:43 AM, Nathan Edgars II nerou...@gmail.com wrote:

 Because a railway platform is usually drawn as a single line (as is a pier).
 Omitting area=yes gives a hole in the middle.

Sounds tagging for the renderer...

Pieren

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Re: [Tagging] area=yes on polygones (was Block names)

2012-04-25 Thread Komяpa
miau.

OSM does not have area object, thus it needs something to mark
object as polygon.

There are some tags that insist that a line/relation is filled inside.
These are area=yes and type=multipolygon.

All the other tags may mean either line or a polygon depending on
context. Sometimes context isn't clear. (Is a circular highway a
roundabout or a filled square?..)

It is rather distinct that highway=*, railway=* are linear usually,
and that landuse=*, amenity=*, shop=*, natural=*, area:highway=* are
polygonal. However, there are some cases when it's not true, like the
platform.

We either need a complete machine-readable list of tags that are
polygons or lines, or need to tag each object separately. For now I
see just the second approach being used; telling that is't invalid
without providing any reasonable fallback is a bad idea.

Currently used list can be found at
http://svn.openstreetmap.org/applications/utils/export/osm2pgsql/default.style

-- 
Darafei Komяpa Praliaskouski
OSM BY Team - http://openstreetmap.by/
xmpp:m...@komzpa.net mailto:m...@komzpa.net

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Re: [Tagging] area=yes on polygones (was Block names)

2012-04-25 Thread Nathan Edgars II

On 4/25/2012 4:53 AM, Pieren wrote:

On Wed, Apr 25, 2012 at 10:43 AM, Nathan Edgars IInerou...@gmail.com  wrote:


Because a railway platform is usually drawn as a single line (as is a pier).
Omitting area=yes gives a hole in the middle.


Sounds tagging for the renderer...


Where did I mention a renderer? If you draw a closed polygon with 
railway=platform, that's a continuous platform with a hole in the 
middle. There may be a few cases of such in real life at a complicated 
junction.


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Re: [Tagging] area=yes on polygones (was Block names)

2012-04-25 Thread Pieren
On Wed, Apr 25, 2012 at 11:05 AM, Komяpa m...@komzpa.net wrote:

 OSM does not have area object,

not yet (maybe in API0.7)

 thus it needs something to mark
 object as polygon.

No. Most of the polygons do not require a tag area (amenity,
building, landuse, leisure, landuse).

 There are some tags that insist that a line/relation is filled inside.
 These are area=yes and type=multipolygon.

Sorry, I don't understand what you try to say here.
type=multipolygon is about relations or I miss something ?

 Sometimes context isn't clear. (Is a circular highway a
 roundabout or a filled square?..)

Agree. This case is why the tag area has been created.

 It is rather distinct that highway=*, railway=* are linear usually,

Hmm... railway yes, platform not sure. As many other features,
platform can be represented by a node, a line or a polygon. This just
depends on the contributor and his mapping level (and source accuracy
and/or motivation). Same issue with people symbolizing rivers with a
line and others with a polygon (and a centre line).

 We either need a complete machine-readable list of tags that are
 polygons or lines, or need to tag each object separately. For now I
 see just the second approach being used; telling that is't invalid
 without providing any reasonable fallback is a bad idea.

 Currently used list can be found at
 http://svn.openstreetmap.org/applications/utils/export/osm2pgsql/default.style

A closed loop tagged highway requires an additional information.
Until a new element type polygon is created in the futur, the
area=yes makes sens here. But a closed loop for railway=platform
does not require any thing more than the geometry (a closed way tagged
railway=platform is always a polygon. Are you asking contributors to
specially tag an object just to avoid some work in osm2pgsql (detect
if the way tagged railway=platform is closed or not) ?

Pieren

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Re: [Tagging] Block names (vs street names) in Brasilia

2012-04-25 Thread Georg Feddern

Am 25.04.2012 08:58, schrieb Elena ``of Valhalla'':

On 2012-04-24 at 21:46:35 -0400, Nathan Edgars II wrote:

On 4/24/2012 2:13 PM, Alex Barth wrote:

Pieren - thanks for pointing out that area=yes is highway only. How could the 
documentation for it be clearer [1]?

It's not highway only. For example, it can be used on
railway=platform: http://www.openstreetmap.org/browse/way/94063273
or man_made=pier: http://www.openstreetmap.org/browse/way/71124853

but in both cases the meaning is contrary to the default for
the main tag, this feature has not been described by tracing
its center line, but its perimeter


as far as I know and always have considered, that is the meaning in 
_all_ cases - because area was invented to differentiate between the 
linear and area meaning of a tag, if it is ambiguous.
And it is documented - at least actually - for the use in both 
directions, so even to distinguish a linear feature from a default area 
feature (area=no).


But back to the block name question, I do not think area=yes is in 
anyway necessary there:


If you consider block as an address feature, addr:block should be used 
at the address itself, not at the block area in total.
If you consider to describe just the block area - just the perimeter - 
to name it, I think place=locality on a closed polygon would be sufficient.
Only if you need to describe the block as an entity - as an 
'administrative object' or something like that - you need a special 
place= block value.


Georg


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Re: [Tagging] Block names (vs street names) in Brasilia

2012-04-25 Thread Martin Koppenhoefer
Am 25. April 2012 12:25 schrieb Georg Feddern o...@bavarianmallet.de:
 as far as I know and always have considered, that is the meaning in _all_
 cases - because area was invented to differentiate between the linear and
 area meaning of a tag, if it is ambiguous.
 And it is documented - at least actually - for the use in both directions,
 so even to distinguish a linear feature from a default area feature
 (area=no).


+1


 If you consider block as an address feature, addr:block should be used at
 the address itself, not at the block area in total.
 If you consider to describe just the block area - just the perimeter - to
 name it, I think place=locality on a closed polygon would be sufficient.
 Only if you need to describe the block as an entity - as an 'administrative
 object' or something like that - you need a special place= block value.


-1, place=locality shouldn't be used here, because according to the
wiki it is not to be used for settlements or parts of them.

cheers,
Martin

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Re: [Tagging] Block names (vs street names) in Brasilia

2012-04-25 Thread Georg Feddern

Am 25.04.2012 12:29, schrieb Martin Koppenhoefer:
-1, place=locality shouldn't be used here, because according to the 
wiki it is not to be used for settlements or parts of them


Objection granted!
I abandon this question, Your Honour! ;-)


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Re: [Tagging] area=yes on polygones (was Block names)

2012-04-25 Thread Paul Johnson
On Apr 25, 2012 1:54 AM, Pieren pier...@gmail.com wrote:

 On Wed, Apr 25, 2012 at 10:43 AM, Nathan Edgars II nerou...@gmail.com
wrote:

  Because a railway platform is usually drawn as a single line (as is a
pier).
  Omitting area=yes gives a hole in the middle.

 Sounds tagging for the renderer...

If it's not incorrect, and is more specific than omission would be, is that
a bad thing?  In this instance specifically, I'm inclined to say no.
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Re: [Tagging] OSMI layers in JOSM

2012-04-25 Thread Sander Deryckere
To make it transparent, you can use one of the buttons under the JOSM layer
pane. The pane, by default in the upper right corner, where you can move
layers up and down etc.

I don't have a clue about the resolution.


Op 25 april 2012 10:28 schreef Martin Vonwald imagic@gmail.com het
volgende:

 Hi all!

 I'm trying to view the OSMI layers in JOSM. The all-knowing,
 all-seeing trash heap pointed me to this (german) article:
 http://forum.openstreetmap.org/viewtopic.php?id=9315

 There it is recommended to use the following link in JOSM:

 http://tools.geofabrik.de/osmi/view/routing/wxs?REQUEST=GetMapSERVICE=wmsVERSION=1.1.1FORMAT=image/pngSRS=EPSG:4326STYLES=LAYERS=unconnected_minor1,unconnected_minor2,unconnected_minor5,unconnected_major1,unconnected_major2,unconnected_major5;

 This works like a charm, but with the limitations, that one has to
 adjust the resolution manually. Also I seem to be unable to get this
 layer transparent. In the article one wrote to add TRANSPARENT=TRUE to
 the link, but I can't get this working.

 Has anyone a hint for me how to get this layer transparent? Is there
 any possibility to autoadjust the resolution?

 Martin

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