GPS Arena Mapping: Measure Your Arena by Walking the Perimeter

Tape measures snag on corners and need two people. A perimeter 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

Start at a corner (ingate is ideal).
Walk the inside track of the arena boundary at a steady pace.
Close the loop back at the start point.
Software fits a rectangle (or polygon) to your track and reports dimensions.

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.