Simple gpx export from ridewithgps

The Tour de Los Padres is coming! The race organizer post the route on ridewithgps. This works, but has convoluted interfaces for people not wanting to use their service. I just wrote a simple script to export their data into a plain .gpx file, including all the waypoints; their exporter omits those.

I've seen two flavors of their data, so here're two flavors of the gpx-from-ridewithgps.py script:

#!/usr/bin/python3
import sys
import json

def quote_xml(s):
    return s.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;")

print("Reading stdin", file=sys.stderr)
data = json.load(sys.stdin)

print(r"""<?xml version="1.0" encoding="UTF-8"?>
<gpx version="1.1" creator="gpx-from-ridewithgps.py" xmlns="http://www.topografix.com/GPX/1/1">""")

for item in data["extras"]:
    if item["type"] != "point_of_interest":
        continue
    poi = item["point_of_interest"]
    print(f'  <wpt lat="{poi["lat"]}" lon="{poi["lng"]}">')
    print(f'    <name>{quote_xml(poi["name"])}</name>')

    desc = poi.get("description","")
    if len(desc):
        print(f'    <desc>{quote_xml(desc)}</desc>')
    print(f'  </wpt>')

print("  <trk><trkseg>")
for pt in data.get("route", {}).get("track_points", []):
    print(f'    <trkpt lat="{pt["y"]}" lon="{pt["x"]}"><ele>{pt["e"]}</ele></trkpt>')
print("  </trkseg></trk>")

print("</gpx>")

#!/usr/bin/python3
import sys
import json

def quote_xml(s):
    return s.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;")

print("Reading stdin", file=sys.stderr)
data = json.load(sys.stdin)

print(r"""<?xml version="1.0" encoding="UTF-8"?>
<gpx version="1.1" creator="gpx-from-ridewithgps.py" xmlns="http://www.topografix.com/GPX/1/1">""")

for poi in data["points_of_interest"]:
    print(f'  <wpt lat="{poi["lat"]}" lon="{poi["lng"]}">')
    print(f'    <name>{quote_xml(poi["name"])}</name>')

    desc = poi.get("description","")
    if len(desc):
        print(f'    <desc>{quote_xml(desc)}</desc>')
    print(f'  </wpt>')

for poi in data["course_points"]:
    print(f'  <wpt lat="{poi["y"]}" lon="{poi["x"]}">')
    print(f'    <name>{quote_xml(poi["n"])}</name>')
    print(f'  </wpt>')

print("  <trk><trkseg>")
for pt in data['track_points']:
    print(f'    <trkpt lat="{pt["y"]}" lon="{pt["x"]}"><ele>{pt["e"]}</ele></trkpt>')
print("  </trkseg></trk>")

print("</gpx>")

You invoke it by downloading the route and feeding it into the script:

curl -s https://ridewithgps.com/routes/54493422.json | ./ridewithgps-to-gpx.py > out.gpx

Note that the route number 54493422 is in the url above.