I'm trying to clip out part of a raster (DEM), change the values within the clipped raster and then merge/join the edited raster back into the original. The context is that I have a high resolution DEM (50 cm) representing a hill and want to show the final shape of the hill after proposed earthworks have taken place (the removal of three metres of soil in a given area).
I've followed this process:
- Extract by Mask (polygon representing proposed earthworks location)
- Create edited raster of earthworks area by reassigning values of clipped raster ('clipped_raster - 3')
- Used raster calculator as follows:
The output I'm getting is limited to the clipped raster, I'm losing the extent of the original raster.