Location-based advertising and marketing service Placecast is hoping to resolve this problem by launching its Match API, Rosetta Stone like-database for location venue data. Placecast’s free Match API will enables location content providers and location-based application developers to refer to a location in any number of ways, and validate that those references resolve to one true location for each check-in. In more simple terms, the API will take duplicate listings for a venue and combine them into one listing.

(via Placecast Launches Match API To Ensure Accuracy In Location-Based Check-Ins )