would anyone have an idea how to reconstruct an original elevation model if only slope-grid and aspect-grid are available?
I am looking for a smarter way than this tideous:
1. split the overall aspect to x and y aspect
2. calculate the subsequent x and y slope
3. make an iterative sum over the rows, thus reaching the z values
4. cross-check / average with the same method over the columns
5. calibrate an z-offset at known point
6. make a grid