OpenYardage
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In OpenStreetMap this club has more holes than a single round, or hands out numbers more than once. Which hole belongs to which course is not in the data: the holes carry no golf:course:name. Where that tag is present we separate the courses and show them one by one. Here all holes stand together, and whoever writes the book makes the choice. Tagging the holes in OpenStreetMap settles it for everyone.
Golfpark De Loonsche Duynen is a golf course in the Netherlands. 19 holes are surveyed here from OpenStreetMap, 6,637 yd6,071 m of playing length in total. No hole has a par on record. The longest hole is number 7 at 554 yd507 m, the shortest number 19 at 135 yd123 m. Worked out in advance: the distance to the front and the back edge of the green for 19 holes as well as the carry distance over 31 bunkers for 16 holes. For 19 holes the elevation change between tee and green is on record as well.
Every hazard carries two numbers: the first reaches its near edge, the second carries past it. Drawn from OpenStreetMap, exactly as the app draws it.
Yardage book for Golfpark De Loonsche Duynen. In OpenYardage every hole is a drawing, with distance rings, your own notes hole by hole and your club choice. Books by other players can be read, copied and printed as an A6 booklet.
OPEN THE COURSE IN THE APPReading needs no account. Writing your own book does.
Never played with a yardage book? What goes in one and how to read it
| TAG | MISSING ON | WHAT FOR |
|---|---|---|
| par | 19 of 19 holes | Club choice and expectation |
| handicap | 19 of 19 holes | Stroke index, net scoring |
| ref | 3 of 19 holes | Hole number, right order |
Holes without ref appear in the table below under numbers we assigned by length; the numbers on the course need not match.
In OpenStreetMap this belongs on the individual hole, not on the course; anyone who plays here can add it there for everyone: edit in FairwayMapper · look at the course in OpenStreetMap · open the editor right away.
All figures in yards, converted from the metre values in OpenStreetMap.All figures in metres. The length follows the line of play from the back tee to the middle of the green and takes a dogleg with it. Carry distances count from the tee to the near edge and to the far edge of the hazard.
TABLE SCROLLS SIDEWAYS
| HOLE | LENGTH | GREEN FRONT · MIDDLE · BACK | GREEN DEPTH | GREEN WIDTH | ELEVATION | WALK TO NEXT HOLE |
|---|---|---|---|---|---|---|
| 1 OSM | 444 yd406 m | 422 · 444 · 464 yd386 · 406 · 424 m | 42 yd38 m | 25 yd23 m | -1 yd-1 m | 118 yd108 m |
| 2 OSM | 437 yd400 m | 420 · 439 · 456 yd384 · 401 · 417 m | 36 yd33 m | 30 yd27 m | 0 yd0 m | 91 yd83 m |
| 3 OSM | 512 yd468 m | 491 · 512 · 533 yd449 · 468 · 487 m | 42 yd38 m | 28 yd26 m | -2 yd-2 m | 93 yd85 m |
| 4 OSM | 424 yd388 m | 410 · 424 · 440 yd375 · 388 · 402 m | 31 yd28 m | 35 yd32 m | 0 yd0 m | · |
| 5 OSM | 168 yd154 m | 159 · 167 · 182 yd145 · 153 · 166 m | 23 yd21 m | 16 yd15 m | 0 yd0 m | 144 yd132 m |
| 6 OSM | 154 yd141 m | 144 · 154 · 163 yd132 · 141 · 149 m | 20 yd18 m | 14 yd13 m | +1 yd0 m | · |
| 7 OSM | 554 yd507 m | 534 · 554 · 572 yd488 · 507 · 523 m | 37 yd34 m | 34 yd31 m | -1 yd-1 m | 95 yd87 m |
| 8 OSM | 156 yd143 m | 137 · 157 · 178 yd125 · 144 · 163 m | 40 yd37 m | 23 yd21 m | -1 yd-1 m | 52 yd48 m |
| 9 OSM | 432 yd395 m | 410 · 429 · 448 yd375 · 392 · 410 m | 37 yd34 m | 32 yd29 m | +1 yd+1 m | 81 yd74 m |
| 10 OSM | 419 yd383 m | 401 · 416 · 432 yd367 · 380 · 395 m | 31 yd28 m | 32 yd29 m | 0 yd0 m | 98 yd90 m |
| 11 OSM | 417 yd381 m | 397 · 414 · 433 yd363 · 379 · 396 m | 36 yd33 m | 31 yd28 m | +1 yd0 m | 83 yd76 m |
| 12 OSM | 259 yd237 m | 248 · 258 · 268 yd227 · 236 · 245 m | 21 yd19 m | 15 yd14 m | 0 yd0 m | 113 yd103 m |
| 13 OSM | 200 yd183 m | 187 · 201 · 217 yd171 · 184 · 198 m | 28 yd26 m | 34 yd31 m | -3 yd-2 m | 85 yd78 m |
| 14 OSM | 495 yd453 m | 469 · 493 · 514 yd429 · 451 · 470 m | 45 yd41 m | 38 yd35 m | -1 yd-1 m | 39 yd36 m |
| 15 OSM | 366 yd335 m | 347 · 366 · 382 yd317 · 335 · 349 m | 36 yd33 m | 24 yd22 m | 0 yd0 m | 108 yd99 m |
| 16 OSM | 171 yd156 m | 151 · 171 · 184 yd138 · 156 · 168 m | 33 yd30 m | 28 yd26 m | -1 yd-1 m | 118 yd108 m |
| 17 OSM | 504 yd461 m | 482 · 504 · 523 yd441 · 461 · 478 m | 40 yd37 m | 42 yd38 m | -1 yd0 m | 107 yd98 m |
| 18 OSM | 390 yd357 m | 371 · 390 · 410 yd339 · 357 · 375 m | 39 yd36 m | 32 yd29 m | 0 yd0 m | · |
| 19 OSM | 135 yd123 m | 124 · 133 · 145 yd113 · 122 · 133 m | 22 yd20 m | 20 yd18 m | 0 yd0 m | · |
| HOLES 1 TO 9 | 3,281 yd3,002 m | |||||
| HOLES 10 TO 18 | 3,221 yd2,946 m | |||||
| 19 HOLES | 6,637 yd6,071 m |
For 19 of the 19 holes the elevation profile is calculated. Hole 2 has the most cumulative elevation change along the played line: 4 yd (2 yd up, 2 yd down; 0 yd net tee to green).Hole 2 has the most cumulative elevation change along the played line: 4 m (2 m up, 2 m down; 0 m net tee to green). The basis are official elevation models (NL-AHN).
Two numbers to every hazard: the first reaches its near edge, the second carries past it. Land between the two and you are in it.
Bunker Red penalty area Water · yards from the teemetres from the tee · L left · R right
The basis is the map of this course in OpenStreetMap. Lengths, distances to the green edge and carry distances are calculated from it, not copied: every hole is projected onto its line of play and the arc length from the tee is counted. This replaces neither an official course measurement nor the club's scorecard. If you spot a mistake you can report it through the course page in the app, map it in FairwayMapper or correct it in OpenStreetMap straight away. Data as of 2026-09-14.
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The club material is still waiting on OpenStreetMap: 19 holes are drawn, not a full round of 9, 18, 27 or 36; the gap is listed above, under par. You know your course better than any stranger: in OpenStreetMap that is an hour of work.
edit in FairwayMapper · look at the course in OpenStreetMap · open the editor right away
As soon as it is there, the club material appears here: QR code, badge and the booklet to leave out.