mbuonanno
lvl.4
Italy
Offline
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Hi Juggins, it depends on what you mean for "accurate GCP coordinates".
If the P4RTK is correctly connected to an NTRIP correction service via the 4G dongle, you can read on the GS RTK app the coordinates of the aircraft. The same is true if you center the D-RTK2 on a point of known coordinates and you set the above coordinates for the D-RTK2.
But to get centimetric accuracy, you must:
- check if the x,y,z coordinates shown in the DJI GS RTK app are referred to the GNSS antenna phase center or to the center of the camera sensor (those stored into the JPG file);
- correct the Z coordinate shown in the DJI GS RTK app subtracting the distance from the GCP on the terrain.
Cheers,
Maurizio
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