Hole 1
Par 3 · 128 yd
Plays west. 1 bunker and water.
Green 23 yd deep, 27 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Golf course in Foster City, California, USA
9 holes, par 28, about 1,083 yards (990 metres) along the hole lines. The par 3s are 1, 2, 3, 5, 6, 7, 8 and 9. The longest hole is the 5th at 156 yd, the shortest the 9th at 89 yd. The map shows 20 bunkers. Water is in play on holes 1, 8 and 9.
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 · 128 yd
Plays west. 1 bunker and water.
Green 23 yd deep, 27 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 101 yd
Plays north-east. 3 bunkers.
Green 32 yd deep, 19 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 91 yd
Plays north-east. 2 bunkers.
Green 51 yd deep, 55 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Par 4 · 155 yd
Plays east. 2 bunkers.
Green 25 yd deep, 23 yd wide. Falls 1% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 156 yd
Plays south-east. 4 bunkers.
Green 33 yd deep, 23 yd wide. Falls 3% overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 127 yd
Plays north-west. 5 bunkers.
Green 23 yd deep, 26 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 127 yd
Plays north-west. 3 bunkers.
Green 66 yd deep, 32 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 109 yd
Plays south-west. 4 bunkers and water.
Green 21 yd deep, 23 yd wide. Nearly flat overall. An arrow every 4 m here, every 2 m in the app.
Par 3 · 89 yd
Plays south-east. 1 bunker and water.
Green 25 yd deep, 20 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.