Hole 1
Par 4 · 396 yd
Plays east. 1 bunker.
Green 31 yd deep, 35 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Golf course in Sandusky, Ohio, USA
9 holes, par 35, about 3,073 yards (2,810 metres) along the hole lines. The par 3s are 2, 5 and 8. The par 5s are 3 and 6. The longest hole is the 3rd at 557 yd, the shortest the 5th at 132 yd. The map shows 7 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 · 396 yd
Plays east. 1 bunker.
Green 31 yd deep, 35 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 183 yd
Plays north. 2 bunkers.
Green 25 yd deep, 23 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 557 yd
Plays south-west. 2 bunkers.
Green 22 yd deep, 24 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 382 yd
Plays north.
Green 25 yd deep, 22 yd wide. Falls 5% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 132 yd
Plays south.
Green 24 yd deep, 23 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 486 yd
Plays north. Dogleg left.
Green 27 yd deep, 19 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 400 yd
Plays south-west.
Green 26 yd deep, 26 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 206 yd
Plays south-west.
Green 26 yd deep, 24 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 332 yd
Plays south.
Green 22 yd deep, 27 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.