[OSM-talk] Mapnik now not supporting layer=1 on golfcourses

[Jon Burgess]

On Mon, 2007-05-14 at 17:24 +0100, Andy Robinson wrote:
> We appear to have lost some golf course support in Mapnik in the most
> recent tiles rendered. Previously (as per osmarender still) golf
> course areas within parkland where the course has a layer=1 set were
> rendered one on top of the other for all to see, the current Mapnik
> tiles are no longer showing these golf courses. Example being:
> 
>  
> 
> http://www.openstreetmap.org/index.html?lat=52.5740&lon=-1.8576&zoom=13
> 

It seems that the current code only uses the layer= property to
determine the drawing order (z_order) on lines and not on polygon areas
like the golf course & park.

This is the case both for the old setup_z_order.sql script and the
current osm2pgsql. If it rendered OK before in Mapnik then it was
probably by luck.

Adding this feature needs changes to both define a z_order for polygons
and also to use this to sort the data in the osm.xml style.

	Jon