Hi, I am processing the DJI Phantom 4 RTK data, which are corrected through Ntrip. Without putting any GCP into model construction, the horizontal accuracy is doing well like 5cm. However, the vertical accuracy is terribly wrong as 2m. It seems there is a problem of wrong vertical coordinate system. The vertical values of the model were imported as orthometric height with reference to Hong Kong Principal Datum. Is there any method like Pix4D that I could change the vertical coordinate setting as arbitrary but not egm96? Thanks!
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