I have a slope raster and a road raster. The black pixels in the road raster are NoData values and the pink pixels have a value of 1. They don't cover exactly the same area.
I want to create a new raster based on the slope raster, except for pixels where there is a road pixel. If there is a road pixel, I want to assign a value of zero to the slope raster.
I am not quite sure how the formula needs to look like. I tried the following, put it didn't give me the expected results:
r.mapcalc "output = ((Slope+(Road*null())))"