Strange processing results from Drone Project

I am at a loss for how this can happen in processing some drone data.

The project is processing fine for the first section of images, then the data turns down about 90 degrees and the elevation drops, curling the road - where it should be relatively flat. The data has drone and GCP’s I have processed drone data with GCP’s and never had this happen. I have tried multiple options in processing the data. The data in this processing attempt was as follows - Import Photos and GCP’s (Long, Lat, Z). Then I selected photos and GCP matches. I selected unknown for the drone images Absolute Pose option (Previous unsuccessful processing attempts I used the Position for the initial processing, then switched to unknown for the the processing after I assigned the GCP’s to images. The GCP’s at the end are showing a error of 387m. Trying to figure out where the issue is - In the data? (embedded data in the imagery, GCP collection issues…) or do I have something incorrect


in my settings in the software?

Hello, this seems to be a banana effect: Banana Effect - What To Do If My Model is Bent | Tutorial
In the tutorial, there are some advices how to solve such issue.

Were you providing the alignment in the same project as you had after you got this curve?

What you can try is to:

  • export control point measurements for GCPs
  • open new project
  • import images
  • set their prior pose as unknown
  • import GCPs
  • import control points measurements
  • align