GPS Vs Calculated locations

PIX4Dmapper PIX4Dmapper Questions/Troubleshooting
1

Hi everyone,
Sorry to bother, but I have been having some recent issues with processing. This is new. As you can see in the attached photo, my flight vs calculated position is WAY off. I can not figure out what is causing this. ANY THOUGHTS?

I set up this particular job several times, using all the correct and recommended parameters. Sometimes it works out great, other times it looks like this. WHY?

If I push past this and process the flight, it is perfectly geolocated on a horizontal plane.
Can this be trusted for topography?

I am new at this and still doing lots of training. Any insight would be greatly appreciated.

Thank you!!

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2

Hi Joe,

This could be caused due to the incorrect choice of the image vertical coordinate system.
Can you please share with us the quality report and also the image/GCP/Output horizontal and vertical coordinate systems?

Best,
Nikoleta

3

Hi Nikoleta,
Thank you for the help. The website is only allowing me to put one image in the post. I apologize

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for spamming you.

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7

Hi Joe,

Can you please try the following because I suspect that the Vertical Coordinate System of your images is not defined correctly:

  • Go to the menu bar and select Project> Image Properties Editor

  • In the Image Geolocation section select Edit as shown below

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  • Enable the Advanced Coordinate options and select the Geoid Height Above WGS 84 Ellipsoid and reprocess all steps

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Cheers,
Nikoleta