On 28 Mar 2008, at 15:29, Tom Chance wrote:
> Hello,
>
> I'd like to show symbols in the center of certain areas, like the
> parking symbols in OpenStreetMap:
> http://www.openstreetmap.org/?
> lat=51.46993&lon=-0.06831&zoom=16&layers=B
> 0FT
>
> It's not immediately obvious to me how this is achieved, looking at
> the
> style sheet:
> http://svn.openstreetmap.org/applications/rendering/mapnik/osm.xml
> Can anyone enlighten me?
>
You should be able to use PointSymbolizer/TextSymbolizer/
ShieldSymbolizer for polygons. Positions are simply centroids atm:
....
<Rule>
<MaxScaleDenominator>20000</MaxScaleDenominator>
<Filter>[amenity]='parking'</Filter>
<PointSymbolizer file="parking.png" type="png" width="16"
height="16" allow_overlap="false"/>
</Rule>
...
In OSM there is an extra step (I think) in osm2pgsql to extract
centroids and put them into separate layer.
HTH
Artem
> Kind regards,
> Tom Chance
>
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