[MapProxy] poor WMS-Quality
tobias.wendorff at tu-dortmund.de
Tue Dec 29 08:20:29 PST 2020
Am 29.12.2020 um 16:41 schrieb Travis Kirstine:
> The degradation of quality is usually from the srs of the source WMS not
> matching the srs of the cache as a result mapproxy must warp the image
> generated from the source WMS which is never optimal. This can be
> defined using supported_srs in the source section.
> You can also bypass the cache when defining a layer and use the wms
> source directly, if this is done all WMS requests will be forwarded to
> the backend WMS resulting in no quality loss.
Don't forget the different pixel sizes and the "dpi" parameter. I had
lots of "fun" to find the right values for MapServer and QGIS-server,
but never had it 100% fitting.
Also, some ESRI WMS has a switch "resample=true", which might make
quality better when warping is needed.
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