The KML Factbook is a great tool for creating mapped displays of all manner of demographic, economic, and political data. The data used in the KML Factbook comes from the CIA World Factbook. The KML Factbook allows users to to select datasets from the CIA World Factbook and display that data in Google Maps or in Google Earth. You can also preview your maps using the Google Earth browser plug-in. After creating your map you can download the file to use offline in Google Earth.