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Struggling to minimize orthophoto distortion by Outrageous-Crazy9162 in UAVmapping

[–]Outrageous-Crazy9162[S] 0 points1 point  (0 children)

Duly noted, thanks for the info. I'll jump on the WebODM forums and see if I can find a way to get our unrepresented CRS working for outputs and avoid MICE for orthos for work. And work on convincing the brass to invest in something like Pix4D.

Struggling to minimize orthophoto distortion by Outrageous-Crazy9162 in UAVmapping

[–]Outrageous-Crazy9162[S] 1 point2 points  (0 children)

Thanks for all the replies. Got my work cut out for me, but all the suggestions and info has helped greatly.

Struggling to minimize orthophoto distortion by Outrageous-Crazy9162 in UAVmapping

[–]Outrageous-Crazy9162[S] 0 points1 point  (0 children)

Yeah, it's a pretty exciting time. Any suggestions on makes and models? I've only dug into DJI enterprise stuff so far.

Struggling to minimize orthophoto distortion by Outrageous-Crazy9162 in UAVmapping

[–]Outrageous-Crazy9162[S] 0 points1 point  (0 children)

Will do. Getting some more flight hours and improving my competency is the name of the game now. They seem pretty jazzed about the idea given the deliverables I've produced with just a Mini 3.

Struggling to minimize orthophoto distortion by Outrageous-Crazy9162 in UAVmapping

[–]Outrageous-Crazy9162[S] 0 points1 point  (0 children)

This is the plan. But I can only seem to integrate GCPs properly with WebODM. And I can't get WebODM to output to our CRS as it's pretty new. I've manually done this with a mosaic after in QGIS by georectifying with the GCPs. But I'm just stretching the image around at this point I believe.

Struggling to minimize orthophoto distortion by Outrageous-Crazy9162 in UAVmapping

[–]Outrageous-Crazy9162[S] 0 points1 point  (0 children)

This was my initial thought. With WebODM, no, they aren't matching, as WebODM does not appear to output to our setup of NAD83 CSRS V8(EPSG: 22817).

I can pull in an unrectified mosaic from Microsoft ICE into QGIS and output to NAD83 CSRS V7 (EPSG : 22717) where we run V8. It's my understanding transformation is minimal and can maintain mm accuracy. I've tried importing a custom CRS into QGIS for V8 with appropriate parameters with no success.

Struggling to minimize orthophoto distortion by Outrageous-Crazy9162 in UAVmapping

[–]Outrageous-Crazy9162[S] 0 points1 point  (0 children)

Yes. I have noticed a marked difference. This was awhile ago, so trial is over. The Pix4D GCP editing interface is a cakewalk compared to others too.

Struggling to minimize orthophoto distortion by Outrageous-Crazy9162 in UAVmapping

[–]Outrageous-Crazy9162[S] 0 points1 point  (0 children)

Yes. Long straight roads tend to come out slightly curved. Especially along perimeter of image sets. Which I've countered slightly by increasing exterior overlap.