[OSM-dev] Extra-large metatiles
hartmut.holzgraefe at gmail.com
Mon Jan 15 08:18:17 UTC 2018
Based on experience from renderinging large areas for print via my
> 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.
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