I been doing mapping with mavic 2 pro and Autel EVO 1 for lets say 4 months without GCPs. My orthos and models were looking pretty good! Ill post examples.
Then I bought two emlid reach RS+ , I learned how to set them up and connect to NTRIP for base corrections in Las Vegas. Be for adding GCPs on some maps I would lay out points at a certain distance like 10’, 20’, 28’ and so on. and when measuring it out on DD it was dead on or 1/2" out at most.
After four flights using GCPs and check points using reach RS+ base connected to NTRIP for 30 min and reach RS+ rover all in FIX and 999.9 AR. My orthos and models look choppy and last map I did, I laded out a point of measure and it was 4" off . This is with mavic 2 pro
Be for GCPs the maps were beautiful and x and y seemed spot on.
Any Ideas on what I could be doing wrong? Thanks, Im lost at this point