Data sources

Everything on this site comes from somebody else. This page says who, under which licence, and where the dataset can be found.

MAP DATA

Every hole, every bunker and every green edge comes from OpenStreetMap, drawn by volunteers. The data is under the Open Database License (ODbL). Lengths and distances are calculated from it rather than copied; the result is under the same licence as the basis.

ELEVATION DATA

Elevations do not come from the map but from terrain models of the national surveys. In the data, every hole carries the code of the source its elevation difference comes from. 232,775 of 237,801 holes have an elevation.

The notices in the second column stand in the wording the respective licence asks for. They are not translated in any language version: a translated attribution would not be one.

The grid is the cell width of the model and thus the measure of how fine a rise is still caught. One metre means one height value per square metre. At 90 m a roll in the ground that is plainly felt on the hole disappears.

IMAGE DATA

The aerial image under the drawing comes from one of 14 sources, depending on where the hole is: the official orthophoto services of the German states, plus a worldwide image as a fallback. Which one is on screen is named in the corner of the map itself, because it changes with the map section. That is why there is no hole count here as there is for elevation: the tiles are fetched when the map opens, and none of them sits in our data.

These attributions, too, stand in the wording the respective service asks for, and they are not translated in any language version. Where an attribution names no licence, that is what the column says, rather than us assuming one.

SEVERE WEATHER WARNINGS

The weather strip on a course page shows the official warning of the country the course is in. 9 services are connected, each queried by the browser directly; which one is responsible follows from the country code of the course.

What the strip does with a warning is stated here, because several of these licences ask for a notice if the data is edited: the official name, the issuer and the link stand verbatim and are marked against machine translation. Beside them the strip sets its own word for the kind of hazard, and it shows at most two warnings, the most severe first. The official text itself is not altered.

These attributions too stand in the wording the respective licence asks for and are not translated in any language version. Where a service names no licence, the column says exactly that instead of us assuming one.

TYPE

Numbers and labels are set in IBM Plex Mono, © 2017 IBM Corp., under the SIL Open Font License 1.1. The licence does not ask for a credit on the page but for the licence text to travel with the font; it therefore sits in the same directory as the font files. Running text takes the font of the device and loads none.

NOTATION

The notation in the WRITING A ROUND guide (/profil) is based on Scott Fawcett's DECADE system: a circled number for the yardage played, a dot for fairway and green hit, length and lie for the chip, length and miss for the putt. The drawings and the wording of the guide are our own work.

WHAT IS NOT HERE

Weather and wind come from Open-Meteo, severe weather warnings from the official weather service of the country in question; each warning names its own source. None of it is stored. What users enter themselves stays in their book and in no dataset. And where a source has no documented link, the table says so instead of us inventing one.