Re: [OSM-talk] coastline within a park

2010-03-06 Thread Martin Koppenhoefer
2010/3/6 osm easingwold osm.easingw...@hotmail.co.uk:
 http://www.openstreetmap.org/?lat=-36.90445lon=174.85045zoom=16layers=B000FTF

 The renderer is confused by having a park overlapping the sea and it's
 obviously getting the ordering wrong.


Yes. And therefore the problem lies in the rendering rules, not the
underlying data, that's why these should be modified, not the data.
Actually I can think of no case where water should not be rendered
above other nearby polygons. The only situations would be covered
underground water bodies, which should be tagged with a layer-tag and
probably some yet-to-come-underground-tag, so I think this issue can
be solved. (Probably the suggestion to map the water explicitly above
and tag it with natural water, tidal=yes is the best hack proposed
till now, but of course remains unsatisfactory).


 You lose the fact that the basin itself is part of the park, but I'm not
 sure how important that is.


IMHO it is important.

cheers,
Martin

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Re: [OSM-talk] coastline within a park

2010-03-06 Thread Robin Paulson
On 6 March 2010 16:01, Apollinaris Schoell ascho...@gmail.com wrote:
 landuse? no, i didn't use that. i used leisure=park

 sure. ahh…  our messy key,tag combinations for areas natural, landuse, 
 leisure …


 and it's not a national park, only local council


 we still use it for parks if it's the type of parks protecting nature and add 
 a admin_level
 similar to political boundary hierarchy
 key national_park is also documented that it can be used in a wider range of 
 parks.


yeah, i know. precisely why i don't get involved in these
discussions/tag admin anymore. everyone's quite happy adding more and
more tags to solve their little problem, with no consideration for how
it affects the whole.

so there are now three methods for tagging parks? good work that man!

is it any surprise it's a horrible mess?

/out

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Re: [OSM-talk] coastline within a park

2010-03-06 Thread Robin Paulson
On 7 March 2010 13:55, Erik Johansson e...@kth.se wrote:
 Whoa, had a bad day? When things doesn't doesn't work like you want
 them to, it's not because the world is a horrible mess.

no, not a bad day. previous bad experiences on osm around tagging:
everyone's so concentrated on their own small problem, they ignore the
bigger picture of what osm is/could be for

anyway, back to mapping. gotta keep the stress levels down

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Re: [OSM-talk] coastline within a park

2010-03-05 Thread Robin Paulson
On 5 March 2010 20:35, simon msr...@gmail.com wrote:

 In this case your park have to follow the coastline with the tham node
 (I have correct it to show you)

unfortunately the water is part of the park

 If it was a park with water in the midle you have to use multipolygone
 relation http://wiki.openstreetmap.org/wiki/Multipolygon

right, will do

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Re: [OSM-talk] coastline within a park

2010-03-05 Thread Robin Paulson
On 5 March 2010 20:40, Apollinaris Schoell ascho...@gmail.com wrote:
 Don't use coastline but tag the basin with natural water or any other water 
 type tags
 like riverbank …

hmm, well if we can ignore for a moment the abomination of
inconsistency that is water tagging in general and natural=water
specifically, then no:

the basin is tidal, so it's coastline

 coastline is also sensitive to direction while water has to be a closed 
 polygon only, direction doesn't matter

yes

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Re: [OSM-talk] coastline within a park

2010-03-05 Thread Robin Paulson
On 5 March 2010 20:39, John Smith deltafoxtrot...@gmail.com wrote:
 On 5 March 2010 17:17, Robin Paulson robin.paul...@gmail.com wrote:
 i've recently mapped a park which contains a basin. when the tiles
 render, the whole area, including the water, renders green. how would
 i tag this so the renderer understands the water bit should be treated
 as water, and rendered blue?

 The tiles just needed to be marked dirty so they regenerated, try
 viewing it now.

they'd already rendered, but now someone else has drawn it
incorrectly. i'll revert, use a polygon relation, and re-render

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Re: [OSM-talk] coastline within a park

2010-03-05 Thread Martin Koppenhoefer
2010/3/5 Robin Paulson robin.paul...@gmail.com:
 they'd already rendered, but now someone else has drawn it
 incorrectly. i'll revert, use a polygon relation, and re-render


haven't you stated above that the water is part of the park? The
multipolygon-relation will exclude the inner from the outer, so IMHO
this is not your desired solution...

cheers,
Martin

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Re: [OSM-talk] coastline within a park

2010-03-05 Thread Greg Troxel

Hillsman, Edward hills...@cutr.usf.edu writes:

 I have a related question, which I've let sit for several months
 hoping to find an answer for. There is a park here

 http://www.openstreetmap.org/?lat=27.8394lon=-82.5924zoom=14layers=B000FTF

 that includes wetland islands, wetland mainland, and dry
 mainland. Initially I could not get any of it to render as
 park. Somehow I eventually dumbed into something that renders the
 wetland islands as park, but it required deleting the islands and
 retracing them--not sure why. Anyway, I don't want to have to retrace
 the mainland wetland coastline to do this, and I also need to connect
 that with the dry mainland section. The entire wetland mainland area
 in the view is part of the park, and I know from visits to the area
 where the northern boundaries for the dry areas are. Can someone
 advise how to do this? I've stayed away from doing any further work on
 the local coastline until I figure this out.

coastline and park should be entirely separate conceptually.  Tag it how
it is, and if it doesn't render how you think it should look into the
rendering rules.  Contorting the tagging to make the current rendering
incarnation work right seems like not a good plan.  I suspect the
rendering folks would be interested in a fix; I can easily see this
being a case not envisioned and not handled.


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Re: [OSM-talk] coastline within a park

2010-03-05 Thread John F. Eldredge
On a related issue, since a way that forms a closed loop is interpreted as the 
boundary of an area rather than as a way, how does one map a road or trail that 
forms a closed loop?

--Original Message--
From: Robin Paulson
Sender: talk-boun...@openstreetmap.org
To: OpenStreetMap talk mailing list
Subject: [OSM-talk] coastline within a park
Sent: Mar 5, 2010 1:17 AM

i'm after some advice. i know this is potentially tagging for the
renderer, but still

i've recently mapped a park which contains a basin. when the tiles
render, the whole area, including the water, renders green. how would
i tag this so the renderer understands the water bit should be treated
as water, and rendered blue?

cheers

http://www.openstreetmap.org/?lat=-36.90445lon=174.85045zoom=16layers=B000FTF

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-- 
John F. Eldredge -- j...@jfeldredge.com
Reserve your right to think, for even to think wrongly is better than not to 
think at all. -- Hypatia of Alexandria
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Re: [OSM-talk] coastline within a park

2010-03-05 Thread Chris Hill
John F. Eldredge wrote:
 On a related issue, since a way that forms a closed loop is interpreted as 
 the boundary of an area rather than as a way, how does one map a road or 
 trail that forms a closed loop?

   
It depends on the context.  A closed loop tagged with a highway tag is 
just a closed highway. Roundabouts are often simple closed loops, but 
render as a ring not an area. There are exceptions of course (it 
wouldn't be OSM without them :-)) If you want to draw a piazza draw the 
closed outline with highway=pedestrian which would normally render as a 
closed loop, but if you add area=yes the whole space is rendered as a 
filled piazza.

Cheers, Chris

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Re: [OSM-talk] coastline within a park

2010-03-05 Thread Apollinaris Schoell

On 5 Mar 2010, at 24:29 , Robin Paulson wrote:

 On 5 March 2010 20:40, Apollinaris Schoell ascho...@gmail.com wrote:
 Don't use coastline but tag the basin with natural water or any other water 
 type tags
 like riverbank …
 
 hmm, well if we can ignore for a moment the abomination of
 inconsistency that is water tagging in general and natural=water
 specifically, then no:
 
 the basin is tidal, so it's coastline
 

Didn't see when zoomed in to your view. clear now from low zoom.
you can hack it but that is dirty tagging for the renderer.

Osmarender: add layer=-1 to the park
Mapnik: add a water polygon and this will render on top of all other area 
features.

If you consider micro mapping in future it's probably better not to use the 
landuse at all instead add a boundary national_park to render the boundary 
itself and have landuse polygons for wood,meadow,… for the details



 coastline is also sensitive to direction while water has to be a closed 
 polygon only, direction doesn't matter
 
 yes
 
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Re: [OSM-talk] coastline within a park

2010-03-05 Thread Robin Paulson
On 6 March 2010 01:41, Martin Koppenhoefer dieterdre...@gmail.com wrote:
 haven't you stated above that the water is part of the park? The
 multipolygon-relation will exclude the inner from the outer, so IMHO
 this is not your desired solution...

ah, yes. good point.

i hadn't understood it fully, thanks for pointing that out

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Re: [OSM-talk] coastline within a park

2010-03-05 Thread Robin Paulson
On 6 March 2010 06:23, Apollinaris Schoell ascho...@gmail.com wrote:
 Didn't see when zoomed in to your view. clear now from low zoom.
 you can hack it but that is dirty tagging for the renderer.

it is indeed. i'll leave it as is, and come up with some bullshit for
when a casual map user asks why panmure basin is coloured green

 Osmarender: add layer=-1 to the park
 Mapnik: add a water polygon and this will render on top of all other area 
 features.

ugh, that's horrible.

 If you consider micro mapping in future it's probably better not to use the 
 landuse at all instead add a boundary national_park to render the boundary 
 itself and have landuse
 polygons for wood,meadow,… for the details


landuse? no, i didn't use that. i used leisure=park

and it's not a national park, only local council

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Re: [OSM-talk] coastline within a park

2010-03-05 Thread Apollinaris Schoell

On 5 Mar 2010, at 13:41 , Robin Paulson wrote:
 
 landuse? no, i didn't use that. i used leisure=park

sure. ahh…  our messy key,tag combinations for areas natural, landuse, leisure 
… 

 
 and it's not a national park, only local council
 

we still use it for parks if it's the type of parks protecting nature and add a 
admin_level similar to political boundary hierarchy
key national_park is also documented that it can be used in a wider range of 
parks. 

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Re: [OSM-talk] coastline within a park

2010-03-04 Thread John Smith
On 5 March 2010 17:17, Robin Paulson robin.paul...@gmail.com wrote:
 i've recently mapped a park which contains a basin. when the tiles
 render, the whole area, including the water, renders green. how would
 i tag this so the renderer understands the water bit should be treated
 as water, and rendered blue?

The tiles just needed to be marked dirty so they regenerated, try
viewing it now.

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Re: [OSM-talk] coastline within a park

2010-03-04 Thread Apollinaris Schoell
Don't use coastline but tag the basin with natural water or any other water 
type tags like riverbank …
coastline is also sensitive to direction while water has to be a closed polygon 
only, direction doesn't matter


On 4 Mar 2010, at 23:17 , Robin Paulson wrote:

 i'm after some advice. i know this is potentially tagging for the
 renderer, but still
 
 i've recently mapped a park which contains a basin. when the tiles
 render, the whole area, including the water, renders green. how would
 i tag this so the renderer understands the water bit should be treated
 as water, and rendered blue?
 
 cheers
 
 http://www.openstreetmap.org/?lat=-36.90445lon=174.85045zoom=16layers=B000FTF
 
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