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Identify a raster layer not in geoview?

Question asked by CSMike_PDX on Jun 7, 2018
Latest reply on Jun 12, 2018 by CSMike_PDX

I can't seem to find a way using the API to identify a layer that is not in a geoview. The specific use case is there is some calculation I need to perform based on a raster dem pixel value and some additional data in a polygon feature layer.  I capture user click location and can easily get the intersecting polygon from the feature layer using a query, but the raster seems like I need to perform an identify to get the pixel value.  The raster is NOT in the map, nor do I want it to be.  I guess my questions are:  If I need a pixel value from a raster... is identify the only way?  If identify is the mechanism... it seems like that is only a method on a geoview. I don't see a way to identify just the raster layer even though that is a capability of the image service itself.  Thanks in advance!