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Rainfall surface elevation interpolation underneath viaducts
I spotted some weird bumps in the surface elevation in Tygron (based on AHN4) created in the rainfall overlay. When comparing to the AHN4 it looks like it is just on the outside of the edges where there are gaps in the AHN-DTM. These "bumps" cause some odd result in the rainfall calculations. Is there a way to overcome this problem?
I uploaded a screenshot (1) with the DEM exported to QGIS, including a hillshade overlay and the calculated surface max value and (2) the AHN4
Thanks in advance