Hole 1
Par 4 · 348 yd
Plays south-west. Dogleg right. Water.
Green 21 yd deep, 21 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Golf course in Callahan, Florida, USA
18 holes, par 72, about 6,278 yards (5,741 metres) along the hole lines. The par 3s are 5, 8, 14 and 16. The par 5s are 2, 6, 13 and 15. The longest hole is the 13th at 598 yd, the shortest the 16th at 142 yd. The map shows 6 bunkers. Water is in play on holes 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 and 18.
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 · 348 yd
Plays south-west. Dogleg right. Water.
Green 21 yd deep, 21 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 439 yd
Plays west. Water.
Green 23 yd deep, 35 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 355 yd
Plays north. Water.
Green 25 yd deep, 43 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 365 yd
Plays north. Water.
Green 36 yd deep, 28 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 202 yd
Plays east. 1 bunker and water.
Green 58 yd deep, 36 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 422 yd
Plays south. Water.
Green 47 yd deep, 31 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 353 yd
Plays south. Water.
Green 45 yd deep, 27 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 180 yd
Plays east. Water.
Green 35 yd deep, 27 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 465 yd
Plays east. Dogleg left. 1 bunker and water.
Green 33 yd deep, 36 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 370 yd
Plays west. Water.
Green 36 yd deep, 31 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 389 yd
Plays north. 1 bunker and water.
Green 25 yd deep, 28 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 353 yd
Plays north. Water.
Green 27 yd deep, 21 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 598 yd
Plays south. Water.
Green 24 yd deep, 35 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 163 yd
Plays east. 1 bunker and water.
Green 37 yd deep, 22 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Par 5 · 401 yd
Plays north. Water.
Green 16 yd deep, 28 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 142 yd
Plays north. Water.
Green 17 yd deep, 35 yd wide. Falls 4% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 343 yd
Plays south. Water.
Green 37 yd deep, 15 yd wide. Falls 2% overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 388 yd
Plays south. 2 bunkers and water.
Green 26 yd deep, 19 yd wide. Falls 1% 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.