We are using a set of 390 geolocated images from DJI Phantom 4Pro covering 3Ha.
There are five GCPs with ID, Northing, Easting, Elevation data in meters (arbitrary coordinate system)
Using GCP Manager/Editor, each of the GCPs were associated with 3, 4 or 5 images.
The problem is this:
When processing with GCPs - the cameras all appear to be looking UPWARDS and the resulting cloud is inverted with +Z down
Processing without GCPs - the resulting cloud is oriented correctly and referenced to WGS84 UTM 10N as expected.
Why would adding arbitrary GCPs cause this inversion?
Northing Values increase towards the North, Easting values increase towards the East
Thanks for any insight!
HighCee Aerial Robotics