[sorenjan]

A better solution would be to use a program that does what most people think of when they hear the word photogrammetry these days, 3D reconstruction from multiple images, and then make an orthorectified image from that.

OpenDroneMap can do that for example.

https://www.opendronemap.org/webodm/

[1-6]

An areal photo that's orthrorectified with ground images as a secondary source would provide better normals. Of course we'd also use differential GNSS base-point targets to stitch the images together. It's difficult to get consistent color temps, exposure, etc with multiple ground images shot at various times throughout the day.