I have two rasters -- one is an ORIGINAL_DEM, the second has some CORRECTED_DEM elevation values and otherwise is NODATA.
What I want is to create a new raster, where the values are the CORRECTED elevation values where there are corrected elevation values, and otherwise are the original DEM values.
In the Tool, I use the following:
Input conditional raster: CORRECTED_DEM
Expression: I tried leaving this blank, I tried "VALUE" > 0, and I tried "VALUE" <> NULL
Input true raster: CORRECTED_DEM
Input false raster: ORIGINAL_DEM
In each of these cases, I get the corrected DEM values ONLY -- the rest of the values are NODATA -- that is, I'm not getting the original DEM values at all!
Thanks for any help....