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Help Build the Yardage Book

Yards Golf Book starts with open-source mapping data from OpenStreetMap, then our community refines each course to production quality. We need GPS routing, greens, tees, fairways, and trees on all 18 holes before our strategy tools are accurate enough to publish. You can help speed up the process for your favorite course.

Map a new course and earn 1 month of full site access. Improve an existing course and earn 1 week of full access. Plus, you get permanent access to any course you contribute to. We hold a high bar for production: every hole needs GPS routing, greens, tees, fairways, and 100+ trees before our shot dispersion and strategy tools are accurate enough to be useful.
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Earn free access — Map a new course and get 1 month of full site access. Improve an existing course and get 1 week. Either way, you get permanent access to the course you contributed to. By submitting, you agree that all mapping data becomes the property of Yards Golf Book.
Click on the map to place polygon points

How to Map a Course

Yards Golf Book uses your mapping data to power 1,000-shot Monte Carlo simulations, strokes gained analysis, and personalized strategy for every golfer. The more accurate your mapping, the better the product.

What it takes to go live: A course needs all 18 holes with GPS routing, greens, tee boxes, fairways, and 100+ mapped trees before our tools are accurate enough to publish. Follow all 8 steps below for the best chance of acceptance.

  1. Step 1 — Hole Routing: Click waypoints from tee to green for each hole. Double-click to finish each path. This defines the hole layout and is the foundation for everything else.
  2. Step 2 — Greens: Draw the putting green outline for each hole. Accuracy here directly affects GIR probability calculations.
  3. Step 3 — Tee Boxes: Draw tee box shapes. Multiple tees per hole are fine — the more tees mapped, the more tee options available.
  4. Step 4 — Fairways: Trace fairway edges. Include landing zones and approach areas. Our shot dispersion model uses these to determine fairway hit probability.
  5. Step 5 — Bunkers: Draw each sand bunker outline. These are critical for penalty calculations and strategy recommendations.
  6. Step 6 — Water: Draw ponds, creeks, and lakes. Water hazards heavily influence club selection and aim point optimization.
  7. Step 7 — Trees: Draw wooded areas and place individual trees. We need 100+ trees inside the course boundary for the hole diagrams to render properly.
  8. Step 8 — Refine: Review hole by hole, place flags if missing, make corrections, then submit for review.

Each accepted course earns 1 month free. Map 5 courses for a full year of Scratch access ($79.99 value).