investigate NO-DATA processing policy
currently the DEM data is pre-processed by assigning Nodata pixels to zero, this could lead to some issues regarding:
- visualizing sea areas, some lakes.
- generating of the terrain mesh data to be visualized in cesium.
A possibility of using an interpolation smoothing filter ( using
gdal_fillnodata.py ) can be considered, however a workaround that avoids re-pre-processing data would be recommended.