calc_terhor.py
  -h
  -h_obs        Height of the observer above the terrain.
  -d_max        Maximum distance in meters for calculating the horizon.
  -d_min        Minimum distance in meters for calculating the horizon.
  -dtm_path     Path to the digital terrain model (DTM).
  -shp_path     Path to shapefile containing the grid points used for calculating the terrain horizons.
  -hdf_path     Path to the .hdf5 file used to store the calculated horizons.
  -step_deg     Resolution of the final terrain horizon. Step width in degrees for rotating ray around grid point.
  -n_cpus       Number of cores used for multiprocessing. -1 for all cores.

desc_terhor.py
  -hdf_path     Path to the *.hdf5 file containing the calculated terrain horizons created using calc_terhor.py
  -out_path     File path used to store the terrain horizon parts.
  -feat         Feature descriptor used to describe the terrain horizon parts. Currently only 'imtf' is supported.
  -w            Width in ° of the extracted horizon parts. Example: -w 10 20 or -w 10
  -s            Step width between horizon parts in °.
  -n            Number of sampling points for each horizon part.

coarse.py 
  -hdf_path     Path to the *.hdf5 file containing the terrain horizon features created using desc_terhor.py
  -hor_path     Path to the image containing the horizon. If a directory is given all *.tif are processed.
  -hfov         HFOV in ° of the image. If unknown provide range of values which will be used e.g. -hfov 35, 40, 45
  -knn          Number of neighbors returned in the matching.
  -dir_bin      Bin size used for direction counting.
  -topn         Topn candidates kept for each HFOV which will be further used in the spatial resection.

spatres.py 
  -coarse_path    Path to *.hdf5 containing the results of the coarse orientation created using coarse.py
  -ransac_thresh  Threshold in px to consider points as inliers.
  -dx_lim         Limit in ° speciyfing width for considering potential pairs.