Re: [Tagging] landuse=grass = natural=grass

2014-09-19 Thread Martin Koppenhoefer
2014-09-18 11:44 GMT+02:00 Pieren pier...@gmail.com:

 I think the consensus is to stay as simple as possible and use only
 one tag to say that there is grass on this piece of land.



I think the consensus is to describe any property you like in OSM. Using
only one tag to summarize a lot of aspects is hardly ever a good idea,
because it limits the way to use the data and makes contributors life more
complicated and not easier (because they have to weight a lot of aspects
instead of directly tagging what they see).

cheers,
Martin
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Re: [Tagging] landuse=grass = natural=grass

2014-09-18 Thread Martin Koppenhoefer


 Il giorno 18/set/2014, alle ore 07:57, Friedrich Volkmann b...@volki.at ha 
 scritto:
 
 Say, how does landcover=grass differ
 from surface=grass?


I agree that in this case it doesn't make a difference, besides that surface is 
typically used as an attribute for highways and not as a feature on its own. 
surface = trees isn't that nice as a tag though, while landcover fits well


cheers,
Martin
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Re: [Tagging] landuse=grass = natural=grass

2014-09-18 Thread Andreas Labres
On 18.09.14 00:33, Martin Koppenhoefer wrote:
 from landuse, meadow would imply grass for me

Meadow IMO means there is some usage taken from the grass/hay (Weide,
Futterwiese,...).

I use landuse=grass in urban areas (Grünstreifen am Straßenrand), for grass
areas that are not a garden but there usage is just to have a (nicht-versiegelte
Fläche; whatever that means in English) green spot there. Another usage: eine
Böschung (whatever that means in English? batter?).

Those are man-made, not natural. And landuse makes no sense there, for
instance a 1m x 1m landuse of grass around a tree.

/al
ceterum censeo landusem esse delendam ;) (for all the neo-Romans here ;)

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Re: [Tagging] landuse=grass = natural=grass

2014-09-18 Thread Martin Vonwald
Hi!

2014-09-17 23:44 GMT+02:00 Daniel Koć daniel@koć.pl:

 We (in Polish forum) think, that changing landuse=grass into natural=grass
 would make better tagging scheme, since grass is seldom a landuse (like
 the tree is natural=tree, not the amenity or something else). How do you
 find this idea?


Not good. Contrary to other people I think that the readability of tags is
most  important, otherwise we could simply use tags like ptn=pnx or
road=flying_saucer and define that those tags mean grass. Both could be
processed perfectly fine but obviously doesn't make any sense at all.

A while ago I wrote down some thoughts about a cleanup of
landuse/natural/surface with the intention of clearly separating those tags
and make it more easy to understand their meaning. I have to admit that I
lost interest in this area so my writing just sits there and waits for
someone to adopt it:
http://wiki.openstreetmap.org/wiki/User:Imagic/landcover . The first
section When to use ... would be the most important in your case.
Therefore I would recommend landcover=grass in your case. If this area is
also used to e.g. produce hay I would also use landuse=meadow.

Best regards,
Martin
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Re: [Tagging] landuse=grass = natural=grass

2014-09-18 Thread Martin Koppenhoefer


 Il giorno 18/set/2014, alle ore 09:30, Martin Vonwald imagic@gmail.com 
 ha scritto:
 
 Not good. Contrary to other people I think that the readability of tags is 
 most  important, otherwise we could simply use tags like ptn=pnx or 
 road=flying_saucer and define that those tags mean grass. Both could be 
 processed perfectly fine but obviously doesn't make any sense at all.
 
 A while ago I wrote down some thoughts about a cleanup of 
 landuse/natural/surface with the intention of clearly separating those tags 
 and make it more easy to understand their meaning. I have to admit that I 
 lost interest in this area so my writing just sits there and waits for 
 someone to adopt it: http://wiki.openstreetmap.org/wiki/User:Imagic/landcover 
 . The first section When to use ... would be the most important in your 
 case. Therefore I would recommend landcover=grass in your case. If this area 
 is also used to e.g. produce hay I would also use landuse=meadow.



+1 to everything, especially the clearly separating part

cheers,
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Re: [Tagging] landuse=grass = natural=grass

2014-09-18 Thread Pieren
On Thu, Sep 18, 2014 at 7:57 AM, Friedrich Volkmann b...@volki.at wrote:
 1. I thought the general consensus was to start using landcover for this
 type of object.

 No consensus. I strongly oppose landcover=* in view of its weak definition,
 and because it invents nothing new. Say, how does landcover=grass differ
 from surface=grass?

I think the consensus is to stay as simple as possible and use only
one tag to say that there is grass on this piece of land. Most of the
contributors don't care if the magic keyword is landuse or natural
or surface or landcover for that and most of them wouldn't agree
to draw different polygons or use several key to make such small
subtleties.

Pieren

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Re: [Tagging] landuse=grass = natural=grass

2014-09-18 Thread Andreas Labres
On 18.09.14 09:07, Martin Koppenhoefer wrote:
 wouldn't these be better tagged with road or highway as landuse values?
 Typically they are part of the road.

We probably misunderstand us...

This here:

   http://www.openstreetmap.org/#map=18/48.20528/16.22363

In the south are Böschungen to the Westautobahn. In the north named
Holzhausenplatz, it's just grass between streets.

And here is some grass around trees:

   http://www.openstreetmap.org/#map=19/48.21408/16.24047
   http://www.openstreetmap.org/#map=19/48.20638/16.25281

It's not road, it's not sidewalk, its Grünstreifen (bzw. winzige Teile
davon). Ideally this would be landcover=grass and being rendered green.

The usage just is to be grass there (Grünfläche).

/al

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Re: [Tagging] landuse=grass = natural=grass

2014-09-18 Thread Andreas Labres
On 18.09.14 09:07, Martin Koppenhoefer wrote:
 wouldn't these be better tagged with road or highway as landuse values?
 Typically they are part of the road.

We probably misunderstand us...

This here:

   http://www.openstreetmap.org/#map=18/48.20528/16.22363

In the south are Böschungen to the Westautobahn. In the north named
Holzhausenplatz, it's just grass between streets.

And here is some grass around trees:

   http://www.openstreetmap.org/#map=19/48.21408/16.24047
   http://www.openstreetmap.org/#map=19/48.20638/16.25281

It's not road, it's not sidewalk, its Grünstreifen (bzw. winzige Teile
davon). Ideally this would be landcover=grass and being rendered green.

The usage just is to be grass there (Grünfläche).

/al

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Re: [Tagging] landuse=grass = natural=grass

2014-09-18 Thread Friedrich Volkmann
On 18.09.2014 08:24, Martin Koppenhoefer wrote:
 Il giorno 18/set/2014, alle ore 07:57, Friedrich Volkmann b...@volki.at ha 
 scritto:

 Say, how does landcover=grass differ
 from surface=grass?
 
 I agree that in this case it doesn't make a difference, besides that surface 
 is typically used as an attribute for highways and not as a feature on its 
 own. 
 surface = trees isn't that nice as a tag though, while landcover fits well

Why does it fit well, and under which circumstances? Land is never covered
by trees alone. Trees are usually accompanied by bushes, grass and other
herbs, moss, algues, insects, etc.

Alternatively, all of these (including trees) could be considered part of
the land. In this case, landcover can only be hydrosphere and/or atmosphere.

So what's your definition of land and landcover?

-- 
Friedrich K. Volkmann   http://www.volki.at/
Adr.: Davidgasse 76-80/14/10, 1100 Wien, Austria

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[Tagging] landuse=grass = natural=grass

2014-09-17 Thread Daniel Koć

Hello,

We (in Polish forum) think, that changing landuse=grass into 
natural=grass would make better tagging scheme, since grass is seldom a 
landuse (like the tree is natural=tree, not the amenity or something 
else). How do you find this idea?


--
Mambałaga

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Re: [Tagging] landuse=grass = natural=grass

2014-09-17 Thread Martin Koppenhoefer


 Il giorno 17/set/2014, alle ore 23:44, Daniel Koć daniel@koć.pl ha scritto:
 
 We (in Polish forum) think, that changing landuse=grass into natural=grass 
 would make better tagging scheme, since grass is seldom a landuse


from landuse, meadow would imply grass for me 

natural is mostly describing a topographic feature like a tree, a peak, a bay, 
a beach, a cliff, wetland, scrub etc. - grass does not fit so well (neither do 
mud or sand btw.). The much more used natural=grassland does fit into the 
system.

Or maybe landcover=grass if this is the only information?


cheers,
Martin
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Re: [Tagging] landuse=grass = natural=grass

2014-09-17 Thread Dave F.

On 17/09/2014 22:44, Daniel Koć wrote:

Hello,

We (in Polish forum) think, that changing landuse=grass into 
natural=grass would make better tagging scheme, since grass is seldom 
a landuse (like the tree is natural=tree, not the amenity or 
something else). How do you find this idea?




1. I thought the general consensus was to start using landcover for this 
type of object.


2. Some diversity in tags is required, otherwise, if boiled down, all 
objects would either be natural or man_made.


Dave F.

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Re: [Tagging] landuse=grass = natural=grass

2014-09-17 Thread Friedrich Volkmann
On 18.09.2014 01:01, Dave F. wrote:
 On 17/09/2014 22:44, Daniel Koć wrote:

 We (in Polish forum) think, that changing landuse=grass into natural=grass
 would make better tagging scheme, since grass is seldom a landuse (like
 the tree is natural=tree, not the amenity or something else). How do you
 find this idea?

Fine, but landuse=grass, landuse=meadow, natural=grassland and surface=grass
are all in use. No need for just another synonymous tag. Consider tags as
codes as in a programming language. It's fine if they are self-explanatory,
but more important is a clear definition and consistent usage.

 1. I thought the general consensus was to start using landcover for this
 type of object.

No consensus. I strongly oppose landcover=* in view of its weak definition,
and because it invents nothing new. Say, how does landcover=grass differ
from surface=grass?

-- 
Friedrich K. Volkmann   http://www.volki.at/
Adr.: Davidgasse 76-80/14/10, 1100 Wien, Austria

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