[Talk-ca] Sinking islands...

[G. Michael Carter]

  In the cases where we have all three and they are identical.  Seems 
better to have the three merged.   In any case good to know.  I'll start 
removing them on import.

On 23/09/10 10:00 AM, Bégin, Daniel wrote:
> Bonjour Michael,
>
> 2010-08-16 11:54 [Talk-ca] Canvec.osm Product - Running!
> I wrote  "natural=land  area features are a duplicate of natural=water inner polygon. It will be removed for the next release.  Point features will still be there."
>
> I understand that natural=land has priority in the rendering. Rendering will then "move" any overlapping features "under" the natural=land feature. It means you are better remove natural=land area before importing.
>
> The standard case for an island is
> - an inner component of a relation type=multipolygon : natural=water
> - a polygon : natural=land
> - a polygon : natural=wood
>
> Remove the polygon natural=land and the polygon natural=wood will render properly  in the hole created by the inner component of the natural=water multipolygon.
>
> Daniel
>
> -----Original Message-----
> From: talk-ca-bounces at openstreetmap.org [mailto:talk-ca-bounces at openstreetmap.org] On Behalf Of G. Michael Carter
> Sent: September 23, 2010 09:09
> To: Talk-CA OpenStreetMap; talk-us at openstreetmap.org
> Subject: [Talk-ca] Sinking islands...
>
>
>    I was importing data in the Georgian Bay area and I noticed
> something.   If an island is natural=land it renders in mapnik as white,
> regardless of the outer multipolygon.   if you have natrual=wood or
> possibly others, it sinks if it's not role=inner.
>
> This is at least what I've observed so far.   It's rather hard to figure
> out when the mapnik tiles get cached and don't refresh in a timely fashion. :-)
>
>
>
>
>
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-- 
*G. Michael Carter*
Contact: H: 1-519-940-8935 | W: 1-905-267-8494 | M: 1-519-215-1869 | F: 
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Google Talk: xmpp:mikeycarter1974 at gmail.com

<http://www.openstreetmap.org/?lat=43.9216&lon=-80.105&zoom=14&layers=B000FTF> 
<http://livedvd.carterfamily.ca/>
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