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
Search
- http://ftp5.gwdg.de/pub/misc/openstreetmap/FOSSGIS2013/FOSSGIS13-623-de-nominatim.mp4 - ~6:30 ranking is influenced by Wikipedia data.