OpenStreetMap
Proposals versus usage
As of 2013-06-05:
http://wiki.openstreetmap.org/wiki/Proposed_features/Incline Status: Rejected (inactive)
But 85000 objects use the Key:
http://taginfo.openstreetmap.org/keys/incline
As of 2013-06-05:
http://wiki.openstreetmap.org/wiki/Proposed_features/Incline Status: Rejected (inactive)
But 85000 objects use the Key:
http://taginfo.openstreetmap.org/keys/incline