Novice user, just starting out with Pix4d for surveys of stockpiles and general contour surveys.
I am using a dji phantom 4 pro for the photography and Leica RTK GPS for the ground control.
Every project I have undertaken to date, the GCP’s are in the correct horizontal location, but incorrect in the vertical (see pic below).
I am using the autodetect, WGS84 coordinate system, for the pictures.
I am selecting the same for the GCP’s.
I thought it might be a geoid separation, but entering this does not seem to make any difference.
Where am I going wrong please?