How to use gpxpy - 10 common examples

# -*- coding: utf-8 -*-

"""
Example on how to add elevations to existing GPX file
"""

import gpxpy as mod_gpxpy

import srtm as mod_srtm

gpx_contents = """test2714.02652.02414.02679.02710.02145.02004.01782.01592.02714.02522.02421.02099.01689.02080.02279.02343.01973.0"""

gpx = mod_gpxpy.parse(gpx_contents)

geo_elevation_data = mod_srtm.get_data()

for segment_no, segment in enumerate(gpx.tracks[0].segments):
    for point in segment.points:
        calculated = geo_elevation_data.get_elevation(point.latitude, point.longitude)
        print 'segment #%s (%13s, %13s) -> gpx:%10s calculated:%10s' % (segment_no, point.latitude, point.longitude, point.elevation, calculated)

def parse(self, file, encoding=None, version = None):
        f = custom_open('test_files/%s' % file, encoding=encoding)

        parser = mod_parser.GPXParser(f)
        gpx = parser.parse(version)
        f.close()

        if not gpx:
            print('Parser error: %s' % parser.get_error())

        return gpx

def reparse(self, gpx):
        xml = gpx.to_xml()

        parser = mod_parser.GPXParser(xml)
        gpx = parser.parse()

        if not gpx:
            print('Parser error while reparsing: %s' % parser.get_error())

        return gpx

def test_checklxml(self):
        self.assertEqual('LXML', mod_parser.GPXParser._GPXParser__library())

def read_gpx_file(self, filename):
        try:
            with open(filename, "r") as f:
                prev_point = None
                head, tail = os.path.split(filename)
                code_route = tail.replace(".gpx", "")
                try:
                    gpx = gpxpy.parse(f)
                    for point in gpx.walk(only_points=True):
                        speed = point.speed_between(prev_point)
                        if speed is None:
                            speed = 0

                        time_difference = point.time_difference(prev_point)
                        if time_difference is None:
                            time_difference = 0

                        distance = point.distance_3d(prev_point)
                        if not distance:
                            distance = point.distance_2d(prev_point)
                        if distance is None:
                            distance = 0

                        self.points_list.append([code_route, point.latitude, point.longitude, point.elevation,

def save_segments(segments, origina_filepath, folder):
    """ Save segments to gpx
    """
    name = origina_filepath.split('/')[-1]
    for i, segment in enumerate(segments):
        label, points = segment
        filename = label + '.' + str(i) + '.' + str(len(points)) + '.' + name.split('.')[0] + '.gpx'

        gpx = gpxpy.gpx.GPX()

        gpx_track = gpxpy.gpx.GPXTrack()
        gpx.tracks.append(gpx_track)

        gpx_segment = gpxpy.gpx.GPXTrackSegment()
        gpx_track.segments.append(gpx_segment)

        for point in points:
            gpx_point = gpxpy.gpx.GPXTrackPoint(
                latitude=point['lat'],
                longitude=point['lon'],
                elevation=point['alt'],
                time=point['time']
            )
            gpx_segment.points.append(gpx_point)

def __init__(self, xml_or_file=None):
        """
        Initialize new GPXParser instance.

        Arguments:
            xml_or_file: string or file object containing the gpx
                formatted xml

        """
        self.init(xml_or_file)
        self.gpx = mod_gpx.GPX()

def save_segments(segments, origina_filepath, folder):
    """ Save segments to gpx
    """
    name = origina_filepath.split('/')[-1]
    for i, segment in enumerate(segments):
        label, points = segment
        filename = label + '.' + str(i) + '.' + str(len(points)) + '.' + name.split('.')[0] + '.gpx'

        gpx = gpxpy.gpx.GPX()

        gpx_track = gpxpy.gpx.GPXTrack()
        gpx.tracks.append(gpx_track)

        gpx_segment = gpxpy.gpx.GPXTrackSegment()
        gpx_track.segments.append(gpx_segment)

        for point in points:
            gpx_point = gpxpy.gpx.GPXTrackPoint(
                latitude=point['lat'],
                longitude=point['lon'],
                elevation=point['alt'],
                time=point['time']
            )
            gpx_segment.points.append(gpx_point)

        save_file(folder, filename, gpx.to_xml())

"""
    name = origina_filepath.split('/')[-1]
    for i, segment in enumerate(segments):
        label, points = segment
        filename = label + '.' + str(i) + '.' + str(len(points)) + '.' + name.split('.')[0] + '.gpx'

        gpx = gpxpy.gpx.GPX()

        gpx_track = gpxpy.gpx.GPXTrack()
        gpx.tracks.append(gpx_track)

        gpx_segment = gpxpy.gpx.GPXTrackSegment()
        gpx_track.segments.append(gpx_segment)

        for point in points:
            gpx_point = gpxpy.gpx.GPXTrackPoint(
                latitude=point['lat'],
                longitude=point['lon'],
                elevation=point['alt'],
                time=point['time']
            )
            gpx_segment.points.append(gpx_point)

        save_file(folder, filename, gpx.to_xml())

def init(self, xml_or_file):
        """
        Store the XML and remove utf-8 Byte Order Mark if present.

        Args:
            xml_or_file: string or file object containing the gpx
                formatted xml

        """
        text = xml_or_file.read() if hasattr(xml_or_file, 'read') else xml_or_file
        self.xml = mod_utils.make_str(text)