Drone2Map Ortho zeigt falsche Z-Höhen an.

Anonymous User

Hallo zusammen,

ich habe einen Kollegen, der versucht hat, ein 2D-Ortho von einigen Bildern zu erstellen. Wenn er die Rapid-Funktion verwendet, sind die Daten in der korrekten Z-Höhe. Wenn er jedoch die aufwendigere 2D-Ortho-Option nutzt und nur die Standard-Einstellungen verwendet, sind sein Ortho und die Basiskarte plötzlich 40 Meter höher... 

Hat jemand eine Idee, warum das passieren könnte?

Bill_VS

If it was flown with a DJI drone, they tend to use the wrong datum for elevation, and can be off by more than 50m vertically. In Pix4Dmapper, I correct this by editing the imagery input table (the one with the EXIF values). I don't use Drone2Map, but I hear it was based on the Pix4D engine, so it might have a similar interface at the beginning of the orthorectification process. You can use a single value to approximate height, or If you want to get more accurate, you could take one ground shot before takeoff, and subtract the AGL elevation of that ground shot (should be 0) from all subsequent values. I've found the approximation method works just fine for my purposes, though.