I'm generating elevation contours from the latest ASTER DEMs, which involves processing hundreds of tiles. Unfortunately, some of them have substantial errors, as seen in this colour relief from S01W079:
These patches are not voids. They have "valid" elevations that are just wildly inaccurate. The resulting contours (generated with
gdal_contour) look like this:
I need to find these spots, but visually inspecting every single tile for errors is not an option. Is there any method I can use to automatically identify problem tiles? CLI and Pythons solutions preferred, but anything would help.
Right now the only option I see is to write a Python script that picks up strange jumps or drops in elevation across the DEM.