I am working with a MapServer and a map file that is displaying a color-relief image.
LAYER NAME "sum" DATA "sum.vrt" TYPE RASTER STATUS ON DEBUG 0 MASK "masklayer" SIZEUNITS PIXELS TOLERANCE 0 TOLERANCEUNITS PIXELS END
Note: I had it working with a PNG raster instead of the VRT with the TIF file also.
I need to be able to identify the pixel value at a point
I did a WMS request GetCapabilities. It is saying that my
sum layer is not queryable.
I tried to do a WMS call with the GetFeatureInfo and I made the bbox from the lat/lng of the point. I thought that would work but since the layers are not queryable, the request will fail.
What can be done to get the value at a point? Could it be done on the front end with open layers?