Zero division when creating the spatial grid

[Andreas-Piter]

Problem:

A ZeroDivisionError appeared during creating a spatial grid.
The reason is that the grid size is bigger than the size of the study area covered by the images in at least one dimension.

Traceback (most recent call last):
  File "/opt/pycharm-community-2024.1.4/plugins/python-ce/helpers/pydev/pydevd.py", line 1551, in _exec
    pydev_imports.execfile(file, globals, locals)  # execute the script
  File "/opt/pycharm-community-2024.1.4/plugins/python-ce/helpers/pydev/_pydev_imps/_pydev_execfile.py", line 18, in execfile
    exec(compile(contents+"\n", file, 'exec'), glob, loc)
  File "/home/piter/develop/sar4infra/sarvey_dev/sarvey/sarvey_mti.py", line 334, in <module>
    main()
  File "/home/piter/develop/sar4infra/sarvey_dev/sarvey/sarvey_mti.py", line 330, in main
    run(config=config, args=args, logger=logger)
  File "/home/piter/develop/sar4infra/sarvey_dev/sarvey/sarvey_mti.py", line 160, in run
    proc_obj.runFiltering()
  File "/home/piter/develop/sar4infra/sarvey_dev/sarvey/processing.py", line 595, in runFiltering
    box_list, num_box = ut.createSpatialGrid(coord_utm_img=coord_utm_obj.coord_utm, length=point1_obj.length,
  File "/home/piter/develop/sar4infra/sarvey_dev/sarvey/utils.py", line 538, in createSpatialGrid
    box_list, num_box = splitImageIntoBoxesRngAz(length=length, width=width,
  File "/home/piter/develop/sar4infra/sarvey_dev/sarvey/utils.py", line 391, in splitImageIntoBoxesRngAz
    x_step = int(np.rint((width / num_box_az) / 10) * 10)
ZeroDivisionError: division by zero

ToDo:

• Catch this error in createSpatialGrid
  • check if num_box_az or num_box_rng are zero
  • if yes, set num_box_az or num_box_rng to 1
• Inform the user if the chosen grid size is too small for the given study area.