Split a gpx file into multiple files

split.py

#!/usr/bin/env python

import logging
from optparse import OptionParser
import os

import gpxpy
import gpxpy.gpx

def split_gpx(source, dest_dir, max_segment_points=500):
    logging.debug("Splitting file " + source + " into files in " + dest_dir)
    output_count = 1
    with open(source, "rb") as f:
        gpx = gpxpy.parse(f)

    output_segment = gpxpy.gpx.GPXTrackSegment()

    for track in gpx.tracks:
        for segment in track.segments:
            for point in segment.points:
                output_segment.points.append(point)

                if len(output_segment.points) >= max_segment_points:
                    write_gpx(dest_dir, output_count, output_segment)
                    output_count += 1
                    output_segment = gpxpy.gpx.GPXTrackSegment()
                    output_segment.points.append(point)

    if len(output_segment.points) > 1:
        write_gpx(dest_dir, output_count, output_segment)


def write_gpx(dest_dir, i, segment):
    gpx = gpxpy.gpx.GPX()
    gpx_track = gpxpy.gpx.GPXTrack()
    gpx.tracks.append(gpx_track)
    gpx_track.segments.append(segment)

    with open(os.path.join(dest_dir, str(i) + ".gpx"), "wb") as f:
        f.write(gpx.to_xml())


def _main():
    usage = "usage: %prog"
    parser = OptionParser(usage=usage,
                          description="")
    parser.add_option("-d", "--debug", action="store_true", dest="debug",
                      help="Turn on debug logging")
    parser.add_option("-q", "--quiet", action="store_true", dest="quiet",
                      help="turn off all logging")
    parser.add_option("-p", "--points", type="int", dest="points", default=500,
                      help="max points per track")
    
    (options, args) = parser.parse_args()
 
    logging.basicConfig(level=logging.DEBUG if options.debug else
    (logging.ERROR if options.quiet else logging.INFO))

    split_gpx(args[0], args[1], max_segment_points=options.points)

if __name__ == "__main__":
    _main()