[OSM-dev] Rendering Rules

Dave Stubbs osm.list at randomjunk.co.uk
Fri Mar 14 13:36:22 GMT 2008

>  I have been playing with the Mapnik source code for rendering some
>  maps.  I have data in a custom format, so I had to write my own driver.
>  Is there some place I can see the style definitions that are being used
>  on Open Street Map?  For example, as you zoom in, a road may appears
>  black.  Then as you zoom in, it changes to white with a black
>  background.  (Python calls them Style and Rule and c++ calls them
>  feature_type_style and rule_type).

The rules are defined using mapnik's XML format.
You can find the style file here:

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