Comparison of different DEM


#1

Hi,

I want to compare a self made S1 DEM with a 90m DEM from TandemX (eg. Differential maps, stadard deviation…). Are there any tools for that in SNAP (for coregistration, resampling…)?


#2

when you geocode your S1 DEM with the Range Doppler Terrain Correction module, simply use the TanDEM-X model as external DEM (make sure you project it into WGS84) and check “Elevation” as additional output. The final product consists of elevation_VV (this is your S1 DEM) and elevation (your TanDEM-X elevation). You can then perform a raster differencing to see how similar both rasters are.