This Site is under editing. Site will be open on 25,Dec 2009
Yahoo! Where On Earth ID (WOEID)
Introduced by Yahoo! Corporation on “where 2.0” held in San Jose , May, 2009.
WOEID is an 32-bit integer ID for locations, such as station, airport, landmarks, etc. assigned by Yahoo! Corporation in an arbitrary manner.
There is no way to encode from latitude and longitude.