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90 lines
3.2 KiB
90 lines
3.2 KiB
# igc2kmz.py igc2kmz GPX module |
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# Copyright (C) 2008 Tom Payne |
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# |
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# This program is free software: you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation, either version 3 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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from datetime import datetime |
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import math |
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import re |
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try: |
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from xml.etree.cElementTree import parse |
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except ImportError: |
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from xml.etree.ElementTree import parse |
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from coord import Coord |
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from track import Track |
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from waypoint import Waypoint |
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GPX_DATETIME_FORMAT = '%Y-%m-%dT%H:%M:%SZ' |
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class gpx_tag(object): |
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def __init__(self, tb): |
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self.tb = tb |
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def __enter__(self): |
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attrs = { |
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'creator': 'http://github.com/twpayne/igc2kmz/wikis', |
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'version': '1.1', |
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'xmlns': 'http://www.topografix.com/GPX/1/1', |
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'xmlns:xsi': 'http://www.w3.org/2001/XMLSchema-instance', |
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'xsi:schemaLocation': 'http://www.topografix.com/GPX/1/1 ' |
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'http://www.topografix.com/GPX/1/1/gpx.xsd'} |
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self.tb.start('gpx', attrs) |
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return self.tb |
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def __exit__(self, type, value, traceback): |
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self.tb.end('gpx') |
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class GPX(object): |
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def __init__(self, file): |
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try: |
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self.filename = file.name |
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except AttributeError: |
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self.filename = '(unknown)' |
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element = parse(file) |
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namespace = re.match('\{(.*)\}', element.getroot().tag).group(1) |
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ele_tag_name = '{%s}ele' % namespace |
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name_tag_name = '{%s}name' % namespace |
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time_tag_name = '{%s}time' % namespace |
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self.coords = [] |
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for trkpt in element.findall('/{%s}trk/{%s}trkseg/{%s}trkpt' |
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% (namespace, namespace, namespace)): |
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lat = math.pi * float(trkpt.get('lat')) / 180.0 |
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lon = math.pi * float(trkpt.get('lon')) / 180.0 |
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ele_tag = trkpt.find(ele_tag_name) |
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ele = 0 if ele_tag is None else float(ele_tag.text) |
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time = trkpt.find(time_tag_name) |
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if time is None: |
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continue |
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dt = datetime.strptime(time.text, GPX_DATETIME_FORMAT) |
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coord = Coord(lat, lon, ele, dt) |
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self.coords.append(coord) |
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self.waypoints = [] |
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for wpt in element.findall('/{%s}wpt' % namespace): |
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name = wpt.find(name_tag_name).text |
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lat = math.pi * float(wpt.get('lat')) / 180.0 |
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lon = math.pi * float(wpt.get('lon')) / 180.0 |
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ele_tag = wpt.find(ele_tag_name) |
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ele = 0 if ele_tag is None else float(ele_tag.text) |
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waypoint = Waypoint(name, lat, lon, ele) |
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self.waypoints.append(waypoint) |
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def track(self): |
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return Track(self.coords, filename=self.filename)
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