The block is affected by a spherical effect after Aerotriangulation

Problem Description

The block is affected by a spherical effect after AT I have a problem when importing my XLS-blockfile

The user acquired a nadir aerial dataset and did follow a specific calibration step

An Aerotriangulation was submitted, the distortion parameters were computed and Photogroup oriented, but the result was not acceptable.

This kind of dataset results in a spherical deformation due to distortion parameters inaccuracy.

- To avoid this problem, it is recommended to:

- Capture a small dataset of any object with the same camera

- Process an AT on this dataset by keeping the default settings

- Export the optical properties of the aero-triangulated photogroup

- Import these optical parameters in your "UAV-photogroup"

- Submit an AT and make sure to set the distortion parameters on "Keep" instead of "Adjust"

- The process will take advantage from these more accurate parameters and avoid the spherical effect.