assign_polygons         Assign the polygons in the original spatial
                        data to their new location.
calculate_cell_size     Calculate size of grid items (deprecated).
calculate_grid          Calculate grid from spatial polygons.
get_shape_details       Extract details from provided polygons
                        (deprecated).
get_shape_details_internal
                        Extract details from provided polygons.
hungarian_cc            hungarian_cc
hungariansafe_cc        hungariansafe_cc
plot.geogrid            Plot a 'geogrid' object
read_polygons           Import spatial data.
