Hole 1
Par 5 · 509 yd
Plays north-east. Dogleg left.
Green 21 yd deep, 20 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Golf course in Thornton, Iowa, USA
9 holes, par 36, about 2,994 yards (2,738 metres) along the hole lines. The par 3s are 3 and 8. The par 5s are 1 and 6. The longest hole is the 1st at 509 yd, the shortest the 3rd at 129 yd. The map shows 4 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 5 · 509 yd
Plays north-east. Dogleg left.
Green 21 yd deep, 20 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 419 yd
Plays south.
Green 23 yd deep, 21 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 129 yd
Plays south-west.
Green 28 yd deep, 24 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 281 yd
Plays north-east. 2 bunkers.
Green 28 yd deep, 19 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 337 yd
Plays south-west. 1 bunker.
Green 20 yd deep, 21 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 453 yd
Plays north-east. Dogleg left.
Green 20 yd deep, 20 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 346 yd
Plays south. Dogleg left.
Green 25 yd deep, 26 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 188 yd
Plays north. 2 bunkers.
Green 22 yd deep, 21 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 332 yd
Plays south.
Green 30 yd deep, 22 yd wide. Falls 3% 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.