Thanks for helping clean up some bad golf mapping!

Hi Bobby,

Thanks for helping the OSM community improve golf course mapping. There's a small problem with how you mapped the first hole (and possibly others) that I wanted to let you know about so that you change how you do it in the future.

The way that it was before is super-wrong, so I'm glad you're working on improving it. The fairway had been marked in such a way that it intersected the green and partially overlapped it. What you did was made the fairway go all the way around the green and you reused the nodes of the green. The problem with what you did is that it isn't topologically correct. There are two ways to handle the green. The first is that, if you can see it in satellite imagery, leave room between the fairway and green. This is called the "fringe" and isn't always obvious from imagery. And when the fairway fully surrounds the green, it should be turned into a multipolygon. The second way is to make the fairway butt up against the green by sharing nodes between them, but exclude the area of the green instead of surrounding it.

This is a wiki page that describes how to do the above: leisure=golf_course

Let me know if you have any questions.

On rereading your sentence, if you are selecting multiple greens and multiple fairways and grouping them once, that won’t work. You need to select one enclosing fairway, and anything that is fully contained within that fairway and group just those together.

No worries. Thanks for responding! I’m always here to answer golf course mapping questions. The best place to start is the following wiki: leisure=golf_course

Can you leave a comment here about which fairway you are getting that error on? You should be able to get a link to that specific option on the bottom of the left sidebar. Or could be that the fairway and green intersect each other. That is the most common problem and needs to be addressed first before grouping them.

Instead of adding "surface=grass", you should *replace* "landuse=grass" with "surface=grass".

leisure=golf_course#Features_within_a_golf_course

Fairways and greens shouldn't intersect. To properly map them, please see examples on the golf course wiki, paying close attention to the "common pitfalls" section towards the end. Thanks.

leisure=golf_course#Common_mapping_pitfalls

FYI, things like cart paths (and most other golf course features) don't have names. To add a "name=Cart Path" tag is incorrect. Just tag it with "golf=cartpath" along with "highway=path" instead.

Hey there Jpipe323,

Thanks for your contributions to golf courses on OSM. We appreciate the efforts.

I was wondering if I could ask a small favor in case you continue to map golf courses. When you draw a fairway like way/1361016157, could you select both the fairway and the green and combine them into a single object (called a multipolygon) by pressing "C" on the keyboard or right clicking and selecting "Merge". That would save me the effort of coming back at a later date and making that change myself. Thanks!

Hi there AsYouAre,

Just wanted to let you know that a change you made to way/918883786 was incorrect. You tagged the outer ring that defines the fairway as "golf=fairway", but it was already part of a multipolygon that correctly defined that. To add that tag when it already existed is saying that everything inside that polygon is fairway, including the green, which isn't correct. I'll fix it. I just wanted to let you know so you could avoid that in the future.

Thanks djjherp for contributing golf courses to the map. In the future, when drawing a fairway that surrounds a green (i.e. way/1360644967), could you combine the fairway and green together (select both and press 'C' on the keyboard) to create a multipolygon? Thanks!

Hey there Brad,

Thanks for your work on golf courses. I'm hoping you can do a favor for me that will save me some future work. When you draw a fairway that surrounds a green (and other things like bunkers), could you select those items and combine/merge them together into a multipolygon? The keyboard shortcut is 'C' in iD. Thanks!

Thanks for listening to my suggestions Steve. It's great to see you creating the multipolygons around the green now. I really appreciate it.

I noticed that you are making golf=fairway polygons around the green that butt up against the rest of the golf=fairway polygon for the hole. They are typically considered to all be the same fairway and should be represented as a single polygon. That's how it's typically mapped from my experience.

Thanks Steve. There's nothing inherently wrong with fairway going around the green. You just have to make sure the lines don't intersect/touch and that you combine them into a multipolygon. For instance, if you look at way/1352433807, you can see it has great imagery and the fairway grass can be seen going all the way around the green. In that case, draw the fairway all the way around, select both (shift click them) and then type 'C' to "Merge" them together into a multipolygon.

There's a problem with some of your golf course mapping. You've made fairways (for example way/1359162412) that intersect other features on the course. In that example, the green. These intersection shouldn't happen. See leisure=golf_course#Common_mapping_pitfalls for examples on how to properly map golf courses. Thanks.

Hey Brad, there's a problem with some of your golf course mapping. You've made fairways (for example way/1359357658) that intersect other features on the course. In that example, the green and and sand trap. This intersection shouldn't happen. See leisure=golf_course#Common_mapping_pitfalls for examples on how to properly map golf courses. Thanks.

Hey Steve, hate to report this on Valentine's Day of all days, but your deletion of way/1034890320 broke the relation that it was a member of. It was happily coupled with the green, but when you deleted the fairway, you left the green single and lonely. I see that you created another green in its place but failed to introduce (merge) it with the existing green.

Please see osm.wiki/Relation:multipolygon to understand the concept and give instructions on how to create them in your editor. You should also check out leisure=golf_course#Common_mapping_pitfalls for some common errors in mapping golf courses.

Thanks.

No problem. It happens to all of us at one time or another. The tools really need to soft-block any attempt to create something like this.

Please be careful that you don't make changes that span massive portions of the map.

Oh, and you might also want to consider learning how to use JOSM if you are going to do a lot of golf courses. It will make life a lot easier than using iD.

Good Morning J,

There's a problem with Hole 8 (and possibly others that you've created). You have the polygon for the fairway and the polygons for the sand traps/bunkers intersecting. They shouldn't be drawn in such a way and the fairway needs to be adjusted to go around (or beside) the bunkers.

It would also help out if you could combine any fairway that completely surrounds a green and/or other features into a multipolygon. See the wiki for examples: leisure=golf_course#Common_mapping_pitfalls

Thanks.