gpx1.2 KB

GPX — Track Without Elevation

Eight trackpoints with timestamps but no `ele` element, the shape a receiver writes on a 2D fix. Elevation-profile code that assumes the element is present either crashes or charts a flat line at zero, which looks like real data.

Geospatial Error handling Time-series data

Preview — first 38 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, 2D fix</name>
    <trkseg>
      <trkpt lat="47.064024" lon="-12.482008">
        <time>2026-01-01T09:00:00Z</time>
      </trkpt>
      <trkpt lat="47.066181" lon="-12.478086">
        <time>2026-01-01T09:00:15Z</time>
      </trkpt>
      <trkpt lat="47.068297" lon="-12.474186">
        <time>2026-01-01T09:00:30Z</time>
      </trkpt>
      <trkpt lat="47.070538" lon="-12.470269">
        <time>2026-01-01T09:00:45Z</time>
      </trkpt>
      <trkpt lat="47.072646" lon="-12.466428">
        <time>2026-01-01T09:01:00Z</time>
      </trkpt>
      <trkpt lat="47.074851" lon="-12.462489">
        <time>2026-01-01T09:01:15Z</time>
      </trkpt>
      <trkpt lat="47.077037" lon="-12.458586">
        <time>2026-01-01T09:01:30Z</time>
      </trkpt>
      <trkpt lat="47.079139" lon="-12.45468">
        <time>2026-01-01T09:01:45Z</time>
      </trkpt>
    </trkseg>
  </trk>
</gpx>

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
Has Elevation: false
Has Time: true
Reason: 2D fix — receiver had too few satellites for altitude

Testing contract

Expected to pass

Scenario: Chart the elevation profile of the track.
Expected result: The absence of elevation is reported explicitly; the profile is empty rather than a flat line at 0 m.

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 — Track Without Elevation” is a deterministic Novus Examples fixture for Geospatial, Error handling, 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-no-elevation.gpx") as f:
    gpx = gpxpy.parse(f)
print(sum(len(t.segments) for t in gpx.tracks), "segments")