I am trying to find ways to calculate a volume with :
- 1 base DEM resolution 1m
- 1 elevation DEM resolution 1m
then in theory, I have to multiply number_of_pixel by surface_of_pixel by sum_of_pixel_value
Here is the point : 56495 * 1 * 22503,27 = too many m3.
It seems obvious that I do something wrong in the second way but can't figure it out.