Hi, You can operate the P4RTK in PPK mode which does not require any real-time radio link. That needs a PPK post processing software which you can use the KlauPPK software to handle base station options, coordinate systems and long baselines.
There is a new post-processing software for DJI P4 RTK that supports all the base station options with complete workflow: KlauPPK software for the Phantom4 RTK - Klau PPK
A good survey practice is to get couple of check points to see how accurate the model is, never trust on fully automated processing! This is clearly indicated in here Why Verity Positioning PPK - Geo Referencing System
Hi All,
We have a new product for accurate aerial surveying without any ground targets. See https://www.veritypositioning.com/ for more details.
Thanks!