Hole 1
Par 4 · 301 yd
Plays south-east. Dogleg left. 1 bunker.
Green 26 yd deep, 25 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Golf course in Port Jefferson, New York, USA
18 holes, par 72, about 6,259 yards (5,723 metres) along the hole lines. The par 3s are 2, 4, 11 and 16. The par 5s are 3, 9, 10 and 18. The longest hole is the 3rd at 552 yd, the shortest the 2nd at 129 yd. The map shows 38 bunkers. Water is in play on the 18th.
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 · 301 yd
Plays south-east. Dogleg left. 1 bunker.
Green 26 yd deep, 25 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 129 yd
Plays south-east. 1 bunker.
Green 25 yd deep, 22 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 552 yd
Plays west. 5 bunkers.
Green 25 yd deep, 25 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 198 yd
Plays west. 3 bunkers.
Green 30 yd deep, 26 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 306 yd
Plays east. Dogleg right. 4 bunkers.
Green 32 yd deep, 25 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 435 yd
Plays east. 2 bunkers.
Green 24 yd deep, 22 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 328 yd
Plays west. 3 bunkers.
Green 27 yd deep, 23 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 359 yd
Plays west. 3 bunkers.
Green 33 yd deep, 30 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 505 yd
Plays north-east. 5 bunkers.
Green 28 yd deep, 24 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 442 yd
Plays south-west. 4 bunkers.
Green 26 yd deep, 32 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 152 yd
Plays west. 3 bunkers.
Green 27 yd deep, 27 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 350 yd
Plays east. 1 bunker.
Green 33 yd deep, 27 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 319 yd
Plays west. Dogleg left. 1 bunker.
Green 25 yd deep, 25 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 395 yd
Plays east. 2 bunkers.
Green 26 yd deep, 27 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 405 yd
Plays west. Dogleg right. 3 bunkers.
Green 24 yd deep, 31 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 178 yd
Plays south-east. 2 bunkers.
Green 27 yd deep, 28 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 413 yd
Plays north-east. 3 bunkers.
Green 26 yd deep, 20 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 492 yd
Plays north-east. 4 bunkers and water.
Green 23 yd deep, 26 yd wide. Falls 2% 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.