[OSM-talk] River Avon in Mapnik

[Brent Easton]

>*********** REPLY SEPARATOR ***********
>
>On 23/10/2007 at 8:39 PM Mike Collinson wrote:
>At 12:11 PM 23/10/2007, David Groom wrote:
>
>However Mapnik ignores all natural = coastline tags, as it generates the
>coastline from I believe a modified version of the original shapefiles. 
>
>
>Aha!  I've have a problem with my arm, or rather an arm of the Baltic.  It
>had problems but now renders in Osmarender but I simply cannot get it to
>render in Mapnik and have pulled out all my hair.  
>
>Can someone confirm where exactly Mapnik is getting its coastline data at
>each zoom level?
>
>http://www.openstreetmap.org/?lat=59.4074&lon=18.0259&zoom=13&layers=0BT  
>- Osmarender

Osmarender uses the natural=coastline you specifically create and nicely fills in the sea side


>http://www.openstreetmap.org/?lat=59.4074&lon=18.0259&zoom=13&layers=B0T -
>Mapnik

Mapnik ignores natural=coastline and uses the innacurate, messy PGS coastline dataset and does not fill in the sea. The only way to get mapnik to look right is to change your natural=coastline arm to a large natural=water area. This will cause Mapnik to render it properly, however, it will still merge in the crummy PGS data, which you will see around the edges of your water area where it does not match. 
____________________________________________________________
Brent Easton                       
Analyst/Programmer                               
University of Western Sydney                                   
Email: b.easton at uws.edu.au