[Talk-ca] Sinking islands...

[Bégin, Daniel]

Cool, 
 
So, what should be done for the next release?
- Keep the natural=land areas - everybody will have to merge each island to get the proper rendering;
- Transform the natural=land areas into points - no merging necessary, no name lost;
- Remove the natural=land areas - name will be lost for next release (1);
 
I'm inclided to implement the second proposition - Easier for me and for most of the contributors;
 
Daniel
 
 
1- The name should be found in both Canvec Island and Named feature (natural=land areas and place=island points) within the next year.

________________________________

From: G. Michael Carter [mailto:mikeycarter1974 at gmail.com] On Behalf Of G. Michael Carter
Sent: September 23, 2010 10:48
To: Bégin, Daniel
Cc: Talk-CA OpenStreetMap
Subject: Re: [Talk-ca] Sinking islands...


I've been taking all three objects and merging them.  So the inner is natural=wood, with name.

http://www.openstreetmap.org/?lat=45.45968&lon=-80.42647&zoom=16&layers=M


Seems to be rendering ok.   Childs and Osawa are examples.

On 23/09/10 10:38 AM, Bégin, Daniel wrote: 

	You are right :-(
	 
	Two solutions are possible for the next release...
	- Convert natural=land area into point feature - the easy solution to always keep the name available;
	- Associate the name to the inner component - If it renders properly. 
	 
	The second one is much more complex (from my side). Can someone try it and send me the conclusion? 
	 
	Daniel

________________________________

	From: G. Michael Carter [mailto:mikeycarter1974 at gmail.com] On Behalf Of G. Michael Carter
	Sent: September 23, 2010 10:14
	To: Bégin, Daniel
	Cc: Talk-CA OpenStreetMap
	Subject: Re: [Talk-ca] Sinking islands...
	
	
	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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