Convert Trekarta .mtrack files to GPX

convert.py

# To generate Track_pb2.py:
# * get app/src/main/java/mobi/maptrek/io/Track.proto from the Trekarta repo
# * run `protoc --python_out=. Track.proto`

from datetime import datetime
import Track_pb2
import sys

track = Track_pb2.Track()

with open(sys.argv[1], 'rb') as proto:
	track.ParseFromString(proto.read())

print('<gpx>')
print('<trk>')
print('<name>' + track.name + '</name>')
print('<trkseg>')
for point in track.points:
	print('<trkpt lat="' + str(point.latitude_e6 / 1e6) + '" lon="' + str(point.longitude_e6 / 1e6) + '">')
	print('<ele>' + str(point.altitude) + '</ele>')
	print('<time>' + datetime.fromtimestamp(point.timestamp / 1000).isoformat() + '</time>')
	print('<hdop>' + str(point.accuracy) + '</hdop>')
	print('</trkpt>')
print('</trkseg>')
print('</trk>')
print('</gpx>')