Hi,
We have published a DEM (GeoTIFF) as an ImageService to our ArcGIS Server. It has elevation values between -6ft and 12ft. According to its properties in ArcCatalog, it has a NoData Value of -32767. However, when accessing it via the RasterLayer type in the 3.x JavaScript SDK (4.x is not an option, btw; not sure that it would matter anyway) areas of known NoData values are 0 instead of -32767. This presents a problem, as filtering elevation values on the map via a slider that restricts displaying pixels to only values say, between -2 and 4ft means that the entire map outside the bounds of the dataset is shown. See the screenshot. How can I get the service to actually sent back the NoData value instead of 0, as 0 is actually a valid elevation in the dataset. That way, I can also filter pixels by NoData.
