[OSM-dev] Usual rendering time for Mapnik on World Db

[Frederik Ramm]

Hi,

On 06/15/2011 09:48 AM, Oliver Tonnhofer wrote:
> - display less data in low scales
> - add indices for columns you filter on

There are scripts in

svn.openstreetmap.org/applications/rendering/mapnik/utils/

that can help you find out which of your rendering rules take the most 
time to compute; these are then prime candidates for either moving to 
another zoom level, or creating an index on.

> - create generalized geometries

If anyone has found a good solution for generalizing geometries without 
sacrificing the "minutely update" option I would be very interested to 
hear about that. What I currently do is minutely updates for the 
detailed features plus generalized geometries updated weekly but I find 
it a bit unsatisfying.

Bye
Frederik