Hole 1
Par 4 · 284 yd
Plays east. 2 bunkers.
Green 37 yd deep, 30 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Golf course in Oxon Hill, Maryland, USA
9 holes, par 33, about 2,316 yards (2,118 metres) along the hole lines. The par 3s are 2, 4 and 8. The longest hole is the 7th at 340 yd, the shortest the 2nd at 97 yd. The map shows 10 bunkers. Water is in play on holes 4 and 5.
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 · 284 yd
Plays east. 2 bunkers.
Green 37 yd deep, 30 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 97 yd
Plays east. 1 bunker.
Green 27 yd deep, 28 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 327 yd
Plays south-west. 2 bunkers.
Green 36 yd deep, 27 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 175 yd
Plays south-east. Water.
Green 33 yd deep, 25 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 324 yd
Plays north-west. 1 bunker and water.
Green 28 yd deep, 30 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 317 yd
Plays north-west.
Green 28 yd deep, 33 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 340 yd
Plays east. Dogleg left. 1 bunker.
Green 31 yd deep, 26 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 114 yd
Plays north-east. 2 bunkers.
Green 34 yd deep, 27 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 338 yd
Plays south-west. 3 bunkers.
Green 31 yd deep, 24 yd wide. Falls 4% 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.