I use Snappy to generate interferometric products, many of these have the option to apply the external DEM (interferogram, topoPhaseRemoval, terrainFlattening, terrainCorrection, adElevation) - when applying the DEM using the SNAP GUI and Graphs you get the option to “externalDEMApplyEGM”. I set this parameter to “false” for the operators as follows:
shouldn’t the parameter externalDEMFile contain the absolute path to the external dem, something like "C:\TDX_WGS84.tif"? Maybe this is why the other parameters are ignored.
But I think I have not been clearing parameters properly all the time or loading parameters for two function without clearing in between resulting in some being remembered in the Hashmap causing strange behavior.