Hi, I'm using DJI Phantom 4 RTK fixed photo geotagged and processed 3mx. The result is questionable in height, approx. 2m different with our GCPs.While checking the result of GCP location, I found different value in same reference system. I upload my screenshot for your perusal.WGS84Height: 30.373mWGS84 EGM96 Height: 32.744m4393+ EGM96 Height: 30.557m4393 Height: 28.192mOur GCP Geiod Height: 32.391mGCP Ellipsoid Height: 30.127mMy question is, why EGM96 height different value when i use default WGS84+EGM96 and my 4393 override height EGM96?