What's the best way of mapping gas stations which also have convenience stores and/or car washes of the same brand nearby? If I map the car wash as a tag, which should I apply it to, the gas station or the convenience store? |
Since all 3 things are located in separated buildings / places, you can place 3 different nodes. Some people will map the amenity=fuel to the whole area of the gas station though. The 2 others can then be mapped as areas/buildings inside the gas station area or as nodes. This depends on how much detail you want to add. I would not map them all 3 on the same node. |
For the car wash I usually used a node with amenity=car_wash. |
A similar (identical?) question was asked some time ago, but in British English. I think the answers are still applicable: https://help.openstreetmap.org/questions/22083/should-petrol-station-facilities-be-mapped-separately |