Hole 1
Par 4 · 350 yd
Plays north-west. Dogleg left. 2 bunkers.
Green 31 yd deep, 23 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Golf course in Groton, Connecticut, USA
18 holes, par 71, about 6,448 yards (5,896 metres) along the hole lines. The par 3s are 4, 9, 12 and 15. The par 5s are 5, 8 and 18. The longest hole is the 5th at 552 yd, the shortest the 12th at 119 yd. The map shows 101 bunkers. It shows no water in play.
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 · 350 yd
Plays north-west. Dogleg left. 2 bunkers.
Green 31 yd deep, 23 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 369 yd
Plays east. 5 bunkers.
Green 31 yd deep, 28 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 385 yd
Plays north-west. 10 bunkers.
Green 32 yd deep, 27 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 206 yd
Plays south-east. 8 bunkers.
Green 30 yd deep, 25 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 552 yd
Plays south-east. 12 bunkers.
Green 31 yd deep, 24 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 429 yd
Plays north-west. 10 bunkers.
Green 28 yd deep, 31 yd wide. Falls 5% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 430 yd
Plays south-east. Dogleg left. 10 bunkers.
Green 33 yd deep, 25 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 499 yd
Plays west. Dogleg right. 9 bunkers.
Green 23 yd deep, 37 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 172 yd
Plays south. 3 bunkers.
Green 34 yd deep, 27 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 407 yd
Plays south. 6 bunkers.
Green 28 yd deep, 26 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 378 yd
Plays west. 4 bunkers.
Green 30 yd deep, 23 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 119 yd
Plays north. 5 bunkers.
Green 26 yd deep, 22 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 349 yd
Plays east. 12 bunkers.
Green 30 yd deep, 20 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 418 yd
Plays west. 9 bunkers.
Green 31 yd deep, 25 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 189 yd
Plays south. 3 bunkers.
Green 32 yd deep, 26 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 385 yd
Plays north-west. Dogleg left. 5 bunkers.
Green 34 yd deep, 25 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 343 yd
Plays east. 4 bunkers.
Green 27 yd deep, 28 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 467 yd
Plays east. 9 bunkers.
Green 22 yd deep, 34 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.