After determining the data value range (min/max) with gdalinfo -stats for a specific layer, I have now tried both with no satisfactory results...
PROCESSING "SCALE=AUTO" PROCESSING "SCALE=313.72549438477:425.49020385742" ----- Original Message ----- From: "Fabian Schindler" <fabian.schind...@eox.at> To: "bhudspeth" <bhudsp...@edac.unm.edu> Cc: mapserver-users@lists.osgeo.org Sent: Tuesday, June 16, 2015 11:50:46 AM Subject: Re: [mapserver-users] WMS services from a NetCDF file layer For the PROCESSING "SCALE=<low>:<high>" option you have to replace the <low> and <high> with the respective values (you can use gdalinfo -stats to see what the minimum and maximum values of the image are). Perhaps, you could transform your image on the command line using gdal_translate with the respective "-scale" option and see what the output is there. Regards, Fabian On 16.06.15 18:01, Bill Hudspeth wrote: > Thanks for your suggestion Fabian, > > > I have tried both: > PROCESSING "SCALE=<low>:<high>" > PROCESSING "SCALE=AUTO" > > but with no change....with outputformat set to jpeg, I get a white image, > with outputformat set to PNG, I get a very light grey image....but that is > all! > > Thanks, Bill > > > ----- Original Message ----- > From: "Fabian Schindler" <fabian.schind...@eox.at> > To: mapserver-users@lists.osgeo.org > Sent: Monday, June 15, 2015 8:47:34 AM > Subject: Re: [mapserver-users] WMS services from a NetCDF file layer > > This is probably due to the fact that your raster values are beyond 255. > Mapserver truncates this to 255 which interpreted as white on a > greyscale. To correctly scale the values you can use band processing > options: > > PROCESSING "SCALE=<low>:<high>" > > You can also use "AUTO" but that might result in strangely "tiled" images. > > See: > http://mapserver.org/input/raster.html#special-processing-directives > > Regards, > Fabian > > On 15.06.15 16:04, William Hudspeth wrote: >> Hello, >> >> I am using mapserver to provide WCS and WMS services from individual >> layers (and their constituent bands) contained in a CF-formatted NetCDF >> file. I have successfully implemented WCS services, but am continuing to >> have problems with WMS services. While calls to return a single raster >> grid (derived from a NetCDF layer) as a WMS request returns a correctly >> projected image, the image is entirely white, and does not seem to >> correctly reinterpret original data values into a range of pixel color >> values. I would appreciate any information on what I might be missing. >> >> Thanks! >> >> >> >> _______________________________________________ >> mapserver-users mailing list >> mapserver-users@lists.osgeo.org >> http://lists.osgeo.org/mailman/listinfo/mapserver-users >> > > _______________________________________________ > mapserver-users mailing list > mapserver-users@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/mapserver-users > _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users