[OSM-talk] Coastline?

[Michal Migurski]

Hi,

I'm trying to understand how OSM generates coastlines in Mapnik, to  
render my own tiles.

I'm reading this:
	http://wiki.openstreetmap.org/index.php/Coastline#Main_Mapnik_Layer

It sounds as though there should be some presence of natural=coastline  
in the osm.xml stylesheet:
	http://trac.openstreetmap.org/browser/applications/rendering/mapnik/osm.xml

Instead, I see shapefiles. Are those derived from data in pgsql, or  
are they obtained from elsewhere? Why are they shapefiles instead of  
geometries from the database?

-mike.

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michal migurski- mike at stamen.com
                  415.558.1610