AngToMM
Convert radial lens distortion from angular steps to fixed steps in millimeters
In the input section, enter the field angles in degrees (°) and the related lens-distortion values in micrometers (µm).
Enter the camera constant (focal length) and the fixed step width for the new distortion values, both in millimeters (mm).
For standard aerial survey cameras, a step width of 10.0 or 15.0 mm is applicable.
Click Calculate, then copy and paste the New Distortion values into the RADI statement in the geoin.dat file.