Hole 1
Par 3 · 78 yd
Plays east. 5 bunkers.
Green 20 yd deep, 14 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Golf course in Arnold, Maryland, USA
9 holes, par 27, about 992 yards (907 metres) along the hole lines. The par 3s are 1, 2, 3, 4, 5, 6, 7, 8 and 9. The longest hole is the 4th at 126 yd, the shortest the 1st at 78 yd. The map shows 10 bunkers. Water is in play on holes 2, 3, 6, 7 and 8.
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 3 · 78 yd
Plays east. 5 bunkers.
Green 20 yd deep, 14 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 120 yd
Plays east. Water.
Green 16 yd deep, 15 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 95 yd
Plays south-east. 1 bunker and water.
Green 17 yd deep, 13 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 126 yd
Plays east. 1 bunker.
Green 17 yd deep, 19 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 122 yd
Plays north-west. 2 bunkers.
Green 17 yd deep, 15 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 124 yd
Plays south-east. 4 bunkers and water.
Green 20 yd deep, 20 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 116 yd
Plays north-west. 3 bunkers and water.
Green 21 yd deep, 17 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 119 yd
Plays west. Water.
Green 15 yd deep, 19 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 93 yd
Plays west. 3 bunkers.
Green 19 yd deep, 20 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.