I have just closed a survey using Matrice 210/X4S/DJI GS Pro. After first step and after adding GCP I still have an average 50m between the computed altitude and the real GCP altitude. I noticed The table shows the differences between gcp and pix4 computer position: Pix4d is upgraded to l…

Well a couple of general things here: The number of keypoints and matches are very low. I see the Rapid setting and quite frankly a lot of errors can be expected, run normal settings in Pix4D. You mention DJI GS Pro and Pix4Dcapture, which flight app did you use to collect the pictures? DJI …

Hi Adam, thank you for your suggestion. The error is present with any kind of settings so I moved to rapid settings in order to accelerate the process of testing new solution. I used GS Pro. I did two flight in order to have about the same GSD for the entire project because there are about 10…

I have tons of issues with DJI GS Pro…almost a great application but a real mess… And I can’t imagine any possible scenario of Xeon and Quadro being better than Core i9 and GeForce but to each his own… #6 is about using all the pictures but making sub-projects then merging. This is a standard …

I just did another test. I downgraded to version 4.0.25 and here the results: Later I process the entire project but it seems an issue inside the last version. If useful, I can forward to Pix4d the entire project to take a look.

I repeat the step 1 with full set of photos and now the result is what I expect: It could be a problem on my workstation or my sw installation or a bug on the latest release (take note that I’m using a Matrice 210).

Hi julie The problem is with the last version of the software: i reprocess an old project done with same hardware and I got the same behavior I install a previous release and I got a perfect result import of data is correct From my experience the reason could be: A) a problem in the latest rele…

Hi Massimiliano, Looking at the Coordinate System settings in the Quality Report you provided it seems as if the error might be in there. Actually it would not be a problem of Pix4D, but of the chosen settings. The geotagging of the photos of the drones is very likely referenced to the WGS ellipsoi…

Hi Boris, your analysis looks a good answer. Nevertheless, if this could be the reason I don’t understand why I avoid the issue installing the old version using same material and configuration. I will do some additional test and I wait a feedback from Pix4d.

Hi Massimiliano, As a follow up to my answer of yesterday you can also read the following on the Pix4D support site: https://support.pix4d.com/hc/en-us/articles/202558239-Select-Image-GCP-Output-Coordinate-System-#gsc.tab=0 It is only stating senseFly drones and “default”. For “default” WGS84 sh…

Altitude issue with GCP

PIX4Dmapper PIX4Dmapper Questions/Troubleshooting

Julie_Pichon November 22, 2017, 6:32pm 10

Hi Massimiliano,

Could it be the same issue than the one described here?
https://community.pix4d.com/t/3525

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Altitude issue with GCP

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