Extensive geo data for place names and significant locations around the world. Data files provided by Yahoo with a Creative Commons license
#gis
HeatMapAPI.com
“Heat maps let users quickly visualize density of locations. Some maps will show points, but being able to understand the density of those points makes it much easier to see, especially when using colors.”
GeoNames webservice and data download
GeoNames webservice and data download
The GeoNames geographical database contains over eight million geographical names and consists of 6.5 million unique features whereof 2.2 million populated places and 1.8 million alternate names.
GeoFeed | GeoFeed | Geographically Aware Feeds (Atom, RDF and RSS) and Web Services
GeoFeed | GeoFeed | Geographically Aware Feeds (Atom, RDF and RSS) and Web Services
Interesting site that splices in Geo information to a feed, by reading the contents and finding geographically-relevant references.