[OSM-dev] Rendering Rules
Artem Pavlenko
artem.mapnik at googlemail.com
Fri Mar 14 13:46:46 GMT 2008
On 14 Mar 2008, at 13:36, Dave Stubbs wrote:
>> 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:
> http://trac.openstreetmap.org/browser/applications/rendering/mapnik/
> osm.xml
Alternatively, all styles/rules/filters can be defined directly in
Python. Also, there is save_map method which will output *.xml .
rule_type (reflected as Rule in Python) type has {min,max}
_scale_denominator properties which control when it's active.
Artem
>
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