This tool processes and visualises CoxOrb rowing data. Whether you are preparing for the HoRR, WEHoRR, HOCR, or Isis Bumps, this tool helps you compare CoxOrb data and Strava GPS natively. All computations occur locally within the browser, ensuring that your team's data remains entirely private and is never transmitted to any external server. It aligns GPS data with stroke-by-stroke performance metrics and audio recordings for synchronised spatial analysis, allowing users to evaluate individual outings or compare multiple steering lines against established Tideway/Isis/Charles boundaries.

NEW: Now supports STRAVA GPX files with enhanced parsing and error handling, in addition to CoxOrb's native GPX exports.

A: Interactive Analysis

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  • Process & Merge: Load your own GPX route, alongside optional CSV (stroke metrics) and audio files. Strava and Garmin GPX exports are supported, though they may lack split and rate data.
  • London Tideway Demo: Loads sample race telemetry on the Championship Course. This includes fairway limits, buoys, and other navigational aids, as well as a synchronised audio recording.
  • Isis Race Line: Loads the Oxford Bumps course with an optional 1:1 video sync mode.
  • HOCR Line: Loads the Charles River course example with interactive steering bridge directions.

Upload and (optionally) synchronise your GPX routes with stroke metrics (CSV) and audio recordings (MP3/WAV) for detailed analysis.

or or or

B: Compare Routes

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Multi-Upload Analysis Load multiple separate GPX files simultaneously to overlay their paths on a single map. Visually compare the exact lines taken by different coxes, or compare your own line across two different outings.

Upload up to 5 GPX files to compare steering lines side-by-side. Use the toggles to show or hide them individually.

Route 1
Route 2
Route 3
Route 4
Route 5
Map Overlays
Colour Routes by Speed Applies a shared red-green velocity gradient across all active routes based on combined statistical bounds.
Show Fairway Limits Overlays the designated London Tideway port and starboard boundaries. (Thanks to PLA and Thames RC)
Show Navigation Buoys Plots named navigational buoys along the Tideway. (Thanks to PLA and Thames RC)
Show Tideway Bridges Hover over bridge markers to view reference drawings.
Show Oxford Bumps Line Overlays the Isis race line.
Show HOCR Bridges Hover over bridge markers to view reference drawings.

C: Compare Sessions

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  • Stroke Data Comparison Upload a GPX and CSV file for two separate boats or sessions to compare their steering lines, stroke rates, and split times side-by-side.
  • Alignment Controls Use the interactive trim bars below the map to align the start and finish points of both boats. This allows you to perfectly synchronise their telemetry data regardless of when each GPS device actually started recording.

Upload a GPX and CSV file for two separate boats or sessions to compare their steering lines, stroke rates, and split times side-by-side.

Boat 1 (Orange)

Boat 2 (Blue)

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D: Export Report

Generate a static PDF report of the current analytical view. This hides interactive controls and formats the map and performance chart for printing or saving as a document.

E: Support

⭐️ Support the Project (for free!)

If this tool enhances your coxing, coaching, or rowing analyses, please consider giving the repository a star ⭐️. It costs nothing, helps track community engagement, and encourages future development and updates. It also helps you find it again in a month's time. :)

Star on GitHub ⭐️

F: Feedback

Encountered a bug or have a feature request? Submit your observations below to help refine the analytical tools.

Alternatively, GitHub users can log issues directly via the repository:

Open a GitHub Issue
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