Thermal processing tool strips out RTK coordinates!

OpenDroneMap Desktop
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I have been running through the workflow for creating thermal orthomaps… I used the thermal processing tool for the DJI thermal images as described in the docs… It created the converted files and WebODM created a nice thermal ortho map from them…

But the thermal tool strips out the RTK coordinates that were present in the thermal picture before running it through the tool! This images shows the both set of gps coordinates in the jpg… but after the tool processing the XMP section of the RTK coordinates are gone! The tool should never be loosing data! I have the RTK module and it was converged correctly and in the EXIF section it states that and even shows the NTRIP server that it was connected to.

I hope this can be updated so the converted thermal imagery can use the RTK coordinates like standard jpgs do!

GPSCoordinates
GPSCoordinates631×1280 80.7 KB

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Mm, if this is the case that’s definitely a problem. I thought I had already set the logic to copy all metadata from the original images during conversion, but perhaps something was missed? Can you share (on Google Drive, Dropbox, etc.) a link to one of the images (and their converted equivalent)?

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Here you go:
NoRTKExample
This has the original thermal straight from the ME3T and the converted one… You’ll see the XMP info gone in the converted one… the original will have everything… including the NTRIP info…

Thanks for looking into this!
Harold

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Thanks for sharing the files.

The problem seems to be that exiftool can only copy XMP tags that have a valid definition (which are listed here: DJI Tags ). So some of the tags are skipped.

The good news is that the important ones that ODM cares about (lat/lon/alt,RtkStd*) are copied correctly between the two images. Lat/lon seems to be different at the 7th/8th digit, but I think that’s just a floating point rounding issue which does not translate in a large difference (~1cm max).

Fixing this in thermal tools would require first fixing this in exiftool, which I’m not super-familiar with.

Nonetheless I’ve opened Some DJI XMP tags are not copied correctly · Issue #7 · uav4geo/Thermal-Tools · GitHub to track this.

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thanks for creating the bug on this…
WebODM has been a great tool for my work! This and the other issue I reported yesterday, when updated, would really help make it even better.

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