Geografic-Information-System/scripts/v.centroids/v.centroids.py

#!/usr/bin/env python3
############################################################################
#
# MODULE:       v.centroids
# AUTHOR:       Hamish Bowman
# PURPOSE:      Add missing centroids  (frontend to v.category opt=add)
# COPYRIGHT:    (c) 2006 Hamish Bowman, and the GRASS Development Team
#               This program is free software under the GNU General Public
#               License (>=v2). Read the file COPYING that comes with GRASS
#               for details.
#
#############################################################################

# %Module
# % description: Adds missing centroids to closed boundaries.
# % keyword: vector
# % keyword: centroid
# % keyword: area
# %End

# %option G_OPT_V_INPUT
# %end

# %option G_OPT_V_OUTPUT
# %end

# %option
# % key: option
# % type: string
# % description: Action to be taken
# % options: add
# % answer: add
# % required: no
# %end

# %option G_OPT_V_FIELD
# %end

# %option G_OPT_V_CAT
# % description: Category number starting value
# % answer: 1
# %end

# %option
# % key: step
# % type: integer
# % description: Category increment
# % answer: 1
# % required: no
# %end

import sys
import grass.script as gscript


def main():
    if options["option"] == "add":
        num_bound = gscript.vector_info_topo(map=options["input"])["boundaries"]
        if num_bound == 0:
            gscript.fatal(_("Input vector map contains no boundaries."))

        gscript.run_command("v.category", type="area", **options)

    sys.exit(0)


if __name__ == "__main__":
    options, flags = gscript.parser()
    main()