I am also seeing a horizontal shifting final outputs. The outputs are very precise but shifted 1.5 meters. I can easily shift the outputs back and make them accurate. I am just trying to have a better understanding of why this happens.
“What could cause a big offset when comparing the results with checkpoints?” the link above does not work? I wanted to read more about it.
I am a very experienced land surveyor. Using Trimble R10 base and P4RTK. Area is over a drone test area we made with many more photo control points than needed. It has both bare earth, vegetation, and hard surfaces.
I have a flight where both the RTK will miss the ground control and also if I run PPK on the same images they also miss. But both are very precise and I can move the final data easily enough. I am just puzzled at how this happens.
This has happened before on other areas I have done work. But otherwise most of the time the usual work flow and the results all are right on top of the ground control.
I process all the images in wgs84 and export in that, then afterwards I check it all in Global Mapper and use wgs-84 ground control. (I can re-project later into whatever coordinate system I want and works with no issue. So this is not a coordinate system matter.)
my expertise is in using metashape and that is where I first found this issue. I wanted to rule out it being in the image processing so tried various methods and same results. Then I decided to run the data here in Pix4D, as I intended to learn this app as well. Well Pix4D also misses the ground control. but it is also precise. by the way PIX4D is very easy to use, nicely done.
Looking for feed back and suggestions or if anyone else has this happen? I am mostly trying to understand this as best I can. I am working on writing a drone data processing manual.
I am in Alaska.