When looking at a general view of West-Flanders http://www.openstreetmap.org/#map=10/51.0453/3.0487 you see the airports/airfields of Koksijde (military) Ostend-Bruges (international) and Zuienkerke (an ULM grass field) all rendered in the same way as Brussels National Airport.
The open-data aviation web site http://ourairports.com/ shows 3 levels of importance (large, medium, small) http://ourairports.com/help/legend.html. How to tag the importance of airports/airfields in OSM, so that we don’t see minor fields as Zuienkerke Airport as major POI’s on a smaller (provincial) scale?
Many thanks,
Bart Boute
GISatWVI