I’ve been using Pix4D for a few years and am very familiar with the software. We recently flew +/- 1200-LF of roadway at 60-M in elevation at 5-MPS w/ +/- 90% overlap. Generally we get very good results with these specs. However, for some reason the vertical error is significant. See attached Quality Report.
Does anyone see anything in the report that may indicate why the error is so high? Thank you for your help.
I would change the GCPs accuracy which is set to 0.02 ft. I would use at least 0.06 as you have done with the last GCP.
GCP 3015 has a high error. I would review the marks just in case there was a mistake. As it is a GCP, it is used in the adjustment and in case it is wrong it might be the cause of the large errors in the checkpoints.
I am not sure what was the speed of the drone but I would try to apply the rolling shutter correction too.
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