Bay of Islands Golf Club
Northland · 20 greens mapped
Read these greens →
The greens here
20 greens at Bay of Islands have been mapped from the national LiDAR survey — 8,545 m² of putting surface altogether, with a median green of 388 m². That is within a few percent of the national median of 397 m² — typical for New Zealand.
- Steepest green: hole 14, averaging 5.5% and falling north.
- Flattest green: green a, at 0.7%.
- Most internal fall: hole 14, 1.53 m between its low and high point.
- Largest green: green b, 1062 m².
Every green
| Green | Size | Fall | Avg grade | Runs off to the |
|---|---|---|---|---|
| Hole 1 | 336 m² | 0.73 m | 2.9% | east |
| Hole 2 | 349 m² | 0.61 m | 2.3% | south-west |
| Hole 3 | 517 m² | 0.70 m | 2.5% | north-east |
| Hole 4 | 277 m² | 0.98 m | 5.1% | south |
| Hole 5 | 320 m² | 0.66 m | 2.5% | west |
| Hole 6 | 436 m² | 0.65 m | 2.1% | south |
| Hole 7 | 507 m² | 0.76 m | 1.6% | south |
| Hole 8 | 322 m² | 0.57 m | 3.0% | west |
| Hole 9 | 295 m² | 0.55 m | 2.2% | south-west |
| Hole 10 | 433 m² | 0.60 m | 1.9% | east |
| Hole 11 | 473 m² | 0.36 m | 1.5% | south-east |
| Hole 12 | 341 m² | 0.26 m | 0.9% | south-west |
| Hole 13 | 294 m² | 0.41 m | 1.8% | west |
| Hole 14 | 403 m² | 1.53 m | 5.5% | north |
| Hole 15 | 374 m² | 0.85 m | 2.5% | south |
| Hole 16 | 417 m² | 0.41 m | 1.3% | north-west |
| Hole 17 | 361 m² | 0.32 m | 1.4% | east |
| Hole 18 | 518 m² | 0.74 m | 1.8% | north-west |
| Green A | 511 m² | 0.25 m | 0.7% | north-east |
| Green B | 1062 m² | 0.91 m | 1.4% | north-west |
“Fall” is the height difference between the lowest and highest point of the putting surface. “Avg grade” is the best-fit plane across it — a green can average 2% and still have a shelf on it, which is what the app shows and a table cannot.
Where these numbers come from
Heights come from Land Information New Zealand’s 1 m LiDAR elevation survey (Northland, 2018-2020), published openly under CC BY 4.0. Green outlines and hole numbers come from OpenStreetMap under the Open Database Licence. Slope uncertainty on this course works out at ±0.15%.
Slope is measured. Break is modelled — the read in the app is a physics simulation of a ball rolling over the measured surface, and it knows nothing about grain or moisture. The survey predates any green rebuilt since 2020. More about how this is made.