https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/rasterlayer-3-x-question-about-nodata-values/m-p/1029173#M71832 <P>Hi,<BR /><BR />We have published a DEM (GeoTIFF) as an ImageService to our ArcGIS Server.&nbsp; It has elevation values between -6ft and 12ft.&nbsp; According to its properties in ArcCatalog, it has a NoData Value of -32767.&nbsp; 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.&nbsp; 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&nbsp;<EM>entire&nbsp;</EM><EM>map outside the bounds of the dataset&nbsp;</EM>is shown.&nbsp; See the screenshot.&nbsp; 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.&nbsp; That way, I can also filter pixels by NoData.</P> Mon, 22 Feb 2021 16:36:34 GMT LanceCrumbliss 2021-02-22T16:36:34Z https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/rasterlayer-3-x-question-about-nodata-values/m-p/1029173#M71832 <P>Hi,<BR /><BR />We have published a DEM (GeoTIFF) as an ImageService to our ArcGIS Server.&nbsp; It has elevation values between -6ft and 12ft.&nbsp; According to its properties in ArcCatalog, it has a NoData Value of -32767.&nbsp; 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.&nbsp; 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&nbsp;<EM>entire&nbsp;</EM><EM>map outside the bounds of the dataset&nbsp;</EM>is shown.&nbsp; See the screenshot.&nbsp; 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.&nbsp; That way, I can also filter pixels by NoData.</P> Mon, 22 Feb 2021 16:36:34 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/rasterlayer-3-x-question-about-nodata-values/m-p/1029173#M71832 LanceCrumbliss 2021-02-22T16:36:34Z