Photo GPS postion error during mapping survey capture.

PIX4Dmapper PIX4Dmapper Questions/Troubleshooting
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Photo GPS postion error during mapping survey capture. | DJI Mavic Drone Forum

My drone is a Mavic 2 pro and I am not sure this is a drone issue or a Pix4D Pro processing issue.

 

I have done two flights at this same site and it has resulted in both flights having a number of the photos becoming a long way out from the actual GPS position they were taken at. The first flight grid was using the Pix4Dcapture app, and the second flight was using a similar gird flight plan using Litchi, and both had photos at this same location incorrectly GPS tagged and positioned around the same incorrect location.

This is now the second incident of similar error, except the one previously had all the photos GPS tagged and grouped within the same location, but the location was about 3 kilometer away from the actual site we flew at. Both sites we had done a compass calibration before flying.

The first screen shot is a map survey done in Thailand which we did two captures with same results, and the second is an orbit capture of a tower in Australia.

Has anyone had similar issues and know why this is happening and with any suggestions how to fix this?

 

 

 

 

 

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Hi John,

This could be related to the firmware of the drone.

You should have a look on this post. Some users have experienced the same issue and Blaž proposed a workaround in the official comment:

Pix4D Mavic 2 Processing Issues

Hope this will help,
Best,

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Thanks for the help Marco. yes looks like same issue for sure.  I will also check and follow up with DJI.

 

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I now have a similar issue as this and previously it was confirmed it was indeed a Pix4D issue reading the EXIF files, so I am suspecting this might also be related to Pix4D software and not the drone. In last two weeks using the Mavic Pro 2, I am now having very distorted point cloud data sets again using Pix4D. I always make sure the camera in Pix4D selected is correct for the Mavic Pro 2, however the results were just awful using the Pix4D default processing options with photo positions and GPS positions 2 to 50 meters apart and rsulting in a point cloud that was unrecoginsable. I then changed the processing options 1 Initial Processing > Calibration tab> Calibration method to Alternative and Prior in the drop down. This seems to have mostly improved it but it is far from a good as I get with the P4P, however the site I scanned is now tilted to the right about 2-3 meters from the what the actual site has. Any ideas why this is happeing? Yes I can adjust it with placing GCP or with other methods in Globalmapper, but really this is just not optimal when using the default camera for the Mavic Pro 2 we shouldnt be having these issues. Ive yet to try processing in another software and will do this today and see how it goes.

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Hello John,

Would you please share the quality report?

Kind regards,