gpx3.9 KB

GPX — Garmin TrackPointExtension (heart rate, cadence, temperature)

Eight trackpoints each carrying a Garmin TrackPointExtension with heart rate, cadence and air temperature. The GPX schema deliberately leaves `extensions` open, so this is the fixture for checking that a reader surfaces vendor data instead of discarding it on export.

Geospatial Metadata testing Time-series data

Preview — first 50 linesgpx

<?xml version="1.0" encoding="UTF-8"?>
<gpx version="1.1" creator="Novus Examples geospatial fixtures" xmlns="http://www.topografix.com/GPX/1/1">
  <metadata>
    <name>Kestrel Bay Coast Road</name>
    <desc>Synthetic GPS trace over an invented territory.</desc>
    <time>2026-01-01T09:00:00Z</time>
  </metadata>
  <trk>
    <name>Coast Road with sensor data</name>
    <trkseg>
      <trkpt lat="47.064024" lon="-12.482008">
        <ele>12.1</ele>
        <time>2026-01-01T09:00:00Z</time>
        <extensions>
          <gpxtpx:TrackPointExtension xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1">
            <gpxtpx:hr>128</gpxtpx:hr>
            <gpxtpx:cad>76</gpxtpx:cad>
            <gpxtpx:atemp>11.5</gpxtpx:atemp>
          </gpxtpx:TrackPointExtension>
        </extensions>
      </trkpt>
      <trkpt lat="47.066181" lon="-12.478086">
        <ele>18.9</ele>
        <time>2026-01-01T09:00:15Z</time>
        <extensions>
          <gpxtpx:TrackPointExtension xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1">
            <gpxtpx:hr>131</gpxtpx:hr>
            <gpxtpx:cad>77</gpxtpx:cad>
            <gpxtpx:atemp>11.7</gpxtpx:atemp>
          </gpxtpx:TrackPointExtension>
        </extensions>
      </trkpt>
      <trkpt lat="47.068297" lon="-12.474186">
        <ele>24.8</ele>
        <time>2026-01-01T09:00:30Z</time>
        <extensions>
          <gpxtpx:TrackPointExtension xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1">
            <gpxtpx:hr>134</gpxtpx:hr>
            <gpxtpx:cad>78</gpxtpx:cad>
            <gpxtpx:atemp>11.9</gpxtpx:atemp>
          </gpxtpx:TrackPointExtension>
        </extensions>
      </trkpt>
      <trkpt lat="47.070538" lon="-12.470269">
        <ele>30.5</ele>
        <time>2026-01-01T09:00:45Z</time>
        <extensions>
          <gpxtpx:TrackPointExtension xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1">
            <gpxtpx:hr>137</gpxtpx:hr>
            <gpxtpx:cad>79</gpxtpx:cad>

… 102 lines total — download for the full file.

Specifications

Crs: WGS 84 (EPSG:4326)
Encoding: UTF-8
Line Endings: LF
Seed: 20260807
Jitter Sigma Degrees: 0.000025
Start Time: 2026-01-01T09:00:00Z
Sample Interval Seconds: 15
Format: GPX 1.1
Trackpoints: 8
Extension Namespace: http://www.garmin.com/xmlschemas/TrackPointExtension/v1
Extension Fields: hr, cad, atemp
Heart Rate Range: 128 to 149

Testing contract

Expected to pass

Scenario: Import the track and re-export it, then compare the extension elements.
Expected result: All three extension fields survive the round trip on every point; a reader that drops unknown extensions loses 24 sensor values.

What is a .gpx file?

GPX (GPS Exchange Format) is an XML schema for GPS data, storing waypoints, routes, and tracks with coordinates, elevation, and timestamps. It is the standard interchange format for GPS devices and fitness and navigation apps. Track points capture recorded movement over time.

How to use this file

Use an example GPX file to test GPS track parsing, elevation and timestamp handling, and tools that import routes or visualize recorded activity.

How to use this file for testing

“GPX — Garmin TrackPointExtension (heart rate, cadence, temperature)” is a deterministic Novus Examples fixture for Geospatial, Metadata testing, Time-series data. GeoJSON, GPX, and KML files with points, lines, polygons, and tracks — for testing map tools, route parsers, and geo importers.

Documented properties for this file: seed 20260807 · UTF-8 · LF. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.

Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such — expect parsers to fail loudly rather than silently accept them.

Geospatial fixtures publish one invented territory across formats, with the coordinate reference system and feature counts documented in specs. Convert or reproject and diff against the twin in the same group; edge-case geometries state exactly which assumption they are built to break.

Code examples

import gpxpy  # pip install gpxpy

with open("gpx-trackpoint-extensions.gpx") as f:
    gpx = gpxpy.parse(f)
print(sum(len(t.segments) for t in gpx.tracks), "segments")