A large number of namespaces are used to describe the countries, cities, and regions of the world. In fact there are probably too many.
Factual has its own World Geographies data. To help our partners translate between it, Yahoo Geoplanet, and Geonames*, we’ve published a concordance that maps our entities to theirs, and the other way ‘round.
While this function is usually handled by our Crosswalk API, we’ve not yet enabled that for World Geographies yet, so for simple expediency we’ve made the mapping available as a CSV on Github.
We hope you find it useful.
– Tyler Bell
After Hours Placemaker, Factual
*A huge thanks to David Blackman for the Geonames-to-Geoplanet mappings.