I am using a Ebee Plus UAV with RTK. When processing I do not change anything in the input coordinate system. In the the output system, I change to the state plane system (in this case Illinois State Plane West FT) and change the height above the ellipsoid (in this case it is -98.392’ per https://www.ngs.noaa.gov/cgi-bin/GEOID_STUFF/geoid12B_prompt1.prl). The processed images are significantly higher then they are supposed to be. I have GCPS and traditional survey data to compare. The difference was almost 223.61’… The data processed without the inclusion of GCP’s within DroneDeploy without issue (after the -98.932’ was applied). What am I messing up/missing? I have reprocessed 3 times to make sure it was nothing obvious.
I appreciate any help!