The site includes downloadable census data from 1990 and 2000. As part of the Centers for Disease Control and Prevention, this data warehouse contains tabulated national and state data on such topics as disease, behavioral risk factors, infant and child health, injury, and vital events. Data from this site is intended to inform decision makers about potential problems in the food supply system that might potentially lead to famine, flood, or other food-insecure conditions. Data includes satellite imagery, agricultural statistics, and statistics. A site from the USGS with spatial data currently for the United States, Colorado and Alaska.
Downloadable data includes topics such as geochemistry, geology, geophysics, and minerals.
This site contains soil, landscape, and climatic data for all of Canada and serves as the national archive for land resources information. It maps forest development activities around the world. After registering for free, metadata and data for Cameroon, Canada, and Gabon are available. This demo site from the Geodetic Survey in Canada, allows you to put in UTM coordinates to get latitude and longitude or vice versa. The files are available in ArcView shapefile format as well as in PDF and ZIP file format.