Hello,
I have two sets of drone mappings of an area (using RTK for positioning). One slightly bigger flown on a constant z-level. Another one flown closer along the terrain using a DEM (variable z-level).
I’ve successfully merged the two missions in RC (approx 5 000 images all in all). All is fine. Results are great. Accuracy is great. But the z-heights are wrong.
The second drone mission had 3 ground control points measured with GPS/RTK and marked on flat rocks with spray paint. In the second mission they are readily identified and used by RC. Unfortunately they were not marked when the first mission was flown.
As RC has merged both missions correctly, it seems to be a simple operation to adjust the z-height so that it is according to the ground control points in the second drone mission. (Not using any z-values from the first mission.)
But I do not understand how to accomplish this. I can do it outside of RC (just moving the mesh up/down), but it would be great if the dataset was correct in RC, so that further exports and tweaks are on the right z-level.
Anyone that can explain how this can be accomplished?
Thanks
/Erik