Add apply_z_correction Parameter to warp_dem Function

[vschaffn]

Resolves #643.

Description

This pull request introduces a new parameter, apply_z_correction, to the warp_dem function. This enhancement allows users to control whether vertical correction (Z-offset) is applied during the DEM warping process. The default behavior remains the same, with the Z-correction applied. However, users can now disable this correction by setting apply_z_correction=False.

Changes

• apply_z_correction parameter: A boolean parameter was added to the warp_dem function and the BlockwiseCoreg class to allow toggling of Z-offset application. When set to False, the Z-adjustment step is skipped during the warping process.

Test Update

• The test for warp_dem has been updated to ensure that the function works as expected when apply_z_correction=False.
• The test also verifies that the function correctly undoes the transformation when the Z-correction is disabled, ensuring the output remains consistent with the original DEM.

[rhugonnet]

Great! Just a small comment on the tests! 🙂

On the topic of blockwise: Did you get any new idea about the edge artefacts that it creates while working on it, see example here?
I wonder if we should try to find the source of those (that are probably from warp_dem) before improving the functionality further (in case we have to scrap existing code).