I am working with a Digital Elevation Model for the area in and around a solar plant site.
The problem is that there are two DEM’S available with me, one with surveyed terrain (terrain inside of solar plant boundary with 1m resolution ) reflecting actual topography of site; simultaneously I have used SRTM DEM for topography outside of solar plant site(30 m resolution )
I think I could get better results of flood inundation mapping, if I am able to merge both elevation models (SRTM + Surveyed terrain ) by "re-instating" .
Does anyone have any experience doing this (or similar) and would like to share the method they used?
I believe it is possible to use the Raster Calculator to modify elevations in a DEM within a specific area using a mask in Q GIS, but I do not have experience with this kind of operation and I have not been able to find any example scripts or tutorials just from searching the web.