[OSM-dev] different rendering with mapnik based on area?

[Peter Körner]

Am 31.03.2012 21:12, schrieb Phil! Gold:
> * Sven Geggus<lists at fuchsschwanzdomain.de>  [2012-03-31 16:06 +0000]:
>> is it possible to have different rendering rules based on the area
>> where rendring takes place using an ordinary mapnik rendering stack
>> (osm2pgsql+mod_tile+tirex)?
>
> Supposedly yes.  MapQuest uses has three different stylesheets that they
> use for their tiles and the appropriate one is selected based on where the
> rendered data is.

It won't work without adapting the source. You can choose which source 
you want to adapt:
  - The Style: use different layers for the areas whith 'SELECT WHERE
    ST_Inside(way, ...)'-style queries - simple but slow
  - mapnik: somehow..
  - mod_tile: switch between different maps depending on the requested
    z/x/y-tile
  - The Client (OpenLayers/Leaflet): enable/disable base-layers
    depending on the visible area

Choose whichever way fits your needs best - and tell us about.
Peter