Hello Jukka, Thanks for your reply, i've changed mimetype but i still get the 8-bits png... Johannes
Le mer. 5 févr. 2020 à 11:09, Rahkonen Jukka (MML) < jukka.rahko...@maanmittauslaitos.fi> a écrit : > Hi, > > > > I would make a test by using some other mimetype, like image/png16, for > eliminating the possibility that some internal png configuration drives > over your own outputformat. > > > > I don’t know if it helps but it is cheap to test. > > > > -Jukka Rahkonen- > > > > *Lähettäjä:* mapserver-users <mapserver-users-boun...@lists.osgeo.org> > *Puolesta > *Johannes Paul > *Lähetetty:* keskiviikko 5. helmikuuta 2020 12.03 > *Vastaanottaja:* mapserver-users@lists.osgeo.org > *Aihe:* [mapserver-users] OUTPUTFORMAT png 16-bits > > > > Hello, > > I'm using Mapserver to output PNG 16-bits DEM raster from .HGT elevation > data. > > I'm using the below output format definition : > > OUTPUTFORMAT > > NAME PNG16 > > DRIVER GDAL/PNG > > MIMETYPE image/png > > IMAGEMODE INT16 > > EXTENSION "png" > > END > > However I keep on getting the standard PNG 8-bits out of mapserver. > > > > The strange thing being that when I use a similar config to get GeoTiff > 16-bits, I do get what I'm asking for : > > > > OUTPUTFORMAT > NAME GEOTIFF16 > DRIVER GDAL/GTiff > MIMETYPE image/tiff > IMAGEMODE INT16 > EXTENSION "tiff" > END > > > > Could that be an issue with the GDAL/PNG driver ? It seems that the > GDAL/PNG driver supports only CreateCopy() and not Create(), where the > GDAL/GTiff driver supports both ... Could that be it ? I suspect the > GDAL/PNG driver so I also sent my issue to the GDAL mailing list. > > > > I can see from the mailing list that other users already had a similar > issue, but there is no obvious reason or solution provided. > > https://lists.osgeo.org/pipermail/mapserver-users/2011-April/068428.html > > https://lists.osgeo.org/pipermail/mapserver-users/2012-January/071310.html > > > > For information, I'm using GDAL v2.1.3 and Mapserver v7.0.1 > > Thanks, > > Johannes > > >
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