From OpenStreetMap Wiki
|aeroway = apron|
|An area of an airport where planes are parked, unloaded or loaded, refueled, or boarded|
|Used on these elements|
|Status: In use|
|Tools for this tag|
Anor ramp is the surfaced part of an airport where planes park.
Aprons are usually well visible on aerial and satellite imagery as an area and can be mapped as aeroway=apron.
How to Map
|ref=*||The reference number / name of the apron. On larger airports, there may be several different aprons for different use (passenger/cargo/mechanical service) or for different terminals.|
|surface=*||Use this tag to define the surface of the apron. Examples: paved, sand, grass, gravel, snow, unpaved.|
| Apron of the Helifax Airport
See Munich International Airport for a reference.