patiam
Captain
Flight distance : 1093865 ft
United States
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LV_Forestry Posted at 5-27 09:15
In its case, GCPs with constant locations (If the ground is stable! do not do this on a peat bog for example) and a P4Pro do the trick. In Metashape it works very well.
After that if he wants a perfect georeferencing in his datum that's another story. In this other case yes, it will be necessary to use RTK / PPK to get accurate data.
Yes, the P4P is fine IFF he has precisely positioned GCPs and uses them correctly (and stable ground, as you mentioned). This assuming he wants to relate his results to anything else with real-world coordinates.
So, whatever aircraft he uses, he needs to have a surveyor create some benchmarks for him, or buy or rent the gear to do so himself, after learning how to use it.
With the P4R he will be able to use all or some of his benchmarks as checkpoints rather than GCPs, so he will get a more robust measure of positional accuracy than with GCPs alone.
But bottom line is yes, if he wants to work entirely in arbitrary local relative coordinates, he can do as you described.
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