[Talk-ca] Sinking islands...

G. Michael Carter mikey at carterfamily.ca
Thu Sep 23 15:13:44 BST 2010


  I notice for islands with names the name tag is on the natural=land.

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