GPS Arena Mapping: Measure Your Arena on Foot
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In short: Walk the four corners of your arena with your phone and the course designer turns that walk into the arena's width and length. Walk inside the boards you will jump inside, under open sky if possible. Walk it twice and average the results if they differ by more than 1 m. Use a tape for final certification.
Tape measures snag on corners and need two people. A four-corner walk with a phone GPS can return width and length within a useful tolerance for course planning, especially on grass arenas without permanent fencing.
How it works
- Stand at a corner (ingate is ideal) and tap to mark it as corner 1.
- Walk along one short side to corner 2 and mark it.
- Walk to corners 3 and 4, marking each one.
- The app works out width and length from the four corners.
Accuracy tips
- Walk inside the boards or fence line you will jump inside.
- Avoid walks during heavy tree cover if possible; open sky improves GPS fix.
- Repeat twice; if results differ by more than 1 m, average them.
- Cross-check one diagonal with a long tape for championship builds.
When GPS beats manual measurement
- Temporary arenas at show venues.
- Newly extended arenas before permanent markers are painted.
- Remote sites where you are designing before visiting with full kit.
When to use a tape
FEI and BS course inspections may still want verified markings. Use GPS for design and planning; use traditional measurement for final certification if required.
Save mapped dimensions in your course file so every fence position scales correctly, no more guessing that your 40 × 60 plan fits a 38 × 55 reality.
Step-by-step in YardForge
The GPS arena mapper automates the rectangle-fitting:
- Open the designer on your phone, standing at a corner of the arena.
- Start GPS mapping from the Arena panel and tap to mark corner 1, then walk to corners 2, 3 and 4, marking each one.
- After corner 4, the app works out width × length from the four corners, reports GPS accuracy, and offers to apply the dimensions to your current course.
- Save the arena as a venue preset so every future course for that venue starts from real dimensions.
You can also GPS-tag individual fence positions after building a course on paper, walk to each fence and pin it, and the plan snaps to reality.
Why real dimensions matter for distances
A course designed for 40 × 60 and squeezed into 38 × 55 loses metres exactly where they hurt: the related distances. A five-stride line that shrinks by 1.5m becomes a flat four and a half, the kind of surprise that teaches a young horse to rush. Measure first, then design; the stride labels are only as honest as the arena underneath them.
If your GPS walk gives you a result in feet rather than metres, our jumping arena size in feet guide has the conversion table and typical arena sizes both ways.