Hole 1
Par 4 · 339 yd
Plays north. 1 bunker and water.
Green 36 yd deep, 34 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Golf course in Hartsdale, New York, USA
18 holes, par 72, about 6,205 yards (5,674 metres) along the hole lines. The par 3s are 2, 5, 11 and 15. The par 5s are 6, 8, 10 and 18. The longest hole is the 18th at 501 yd, the shortest the 15th at 120 yd. The map shows 43 bunkers. Water is in play on holes 1, 2, 3, 7, 8 and 9.
Every hole, numbered, as the app draws it.
Each hole turned so it plays up the page, from the tee at the bottom. Every green's slopes are mapped: flip a card to see its green.
Par 4 · 339 yd
Plays north. 1 bunker and water.
Green 36 yd deep, 34 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 178 yd
Plays west. 1 bunker and water.
Green 25 yd deep, 31 yd wide. Falls 5% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 372 yd
Plays south-west. 2 bunkers and water.
Green 26 yd deep, 30 yd wide. Falls 5% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 388 yd
Plays south-west. 6 bunkers.
Green 37 yd deep, 37 yd wide. Falls 6% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 168 yd
Plays south-east. 3 bunkers.
Green 36 yd deep, 31 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 490 yd
Plays north-east. Dogleg left. 5 bunkers.
Green 30 yd deep, 28 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 431 yd
Plays south-west. 1 bunker and water.
Green 37 yd deep, 23 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 453 yd
Plays north-east. 5 bunkers and water.
Green 30 yd deep, 22 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 334 yd
Plays south. 3 bunkers and water.
Green 34 yd deep, 36 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 472 yd
Plays south-west. 3 bunkers.
Green 26 yd deep, 30 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 154 yd
Plays south-west. 2 bunkers.
Green 27 yd deep, 27 yd wide. Falls 6% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 348 yd
Plays south. Dogleg left. 2 bunkers.
Green 26 yd deep, 27 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 283 yd
Plays south-east. Dogleg right. 2 bunkers.
Green 25 yd deep, 22 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 451 yd
Plays north. Dogleg right. 2 bunkers.
Green 27 yd deep, 20 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 120 yd
Plays south-east. 3 bunkers.
Green 23 yd deep, 24 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 366 yd
Plays south. 3 bunkers.
Green 23 yd deep, 19 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 357 yd
Plays north. Dogleg left. 2 bunkers.
Green 27 yd deep, 33 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 501 yd
Plays north-east. 4 bunkers.
Green 36 yd deep, 34 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Lengths are measured along each hole's line on OpenStreetMap, so they can differ from the club's card. A bunker between two holes counts on both.
The app
On your iPhone and Apple Watch, Number & Line turns this map into a yardage book, with distances to the front, middle and back of each green from where you stand. You can plan each hole at home and get club advice from your own distances and the day's wind.
The app is coming soon to the App Store, and this course is already built for it.

Course map © OpenStreetMap contributors, under the Open Database Licence. See it on OpenStreetMap, where anyone can correct it. Green slopes: USGS 3D Elevation Program 1 m DEM (public domain). Our maps are open data too. Number & Line isn't connected with the club.