Based on experience from renderinging large areas for print via my MapOSMatic clone:
as size increases I expect query time and time to render to increase, but time per tile to decrease. I don't know at what point this stops being true.
PostGIS Query time seems to go up in a non-linear fashion with the area to reander. This is just a gut feeling so far though, I did not get to really benchmark this yet.
I believe Mapnik has problems with very large images, but I'm not sure when that happens. I think at least 16k px wide is doable.
At least with the Cairo backend the limit is hard coded at 32k (or 30k already). I can't use AGG in my setup as additional content gets added
via pyCairo, so I don't know what limits that may have. -- hartmut _______________________________________________ dev mailing list dev@openstreetmap.org https://lists.openstreetmap.org/listinfo/dev
