The US Census provides thematic maps at various levels of geography and for many data points.

Twentieth century conditions in maps.

The map images as well as the satellite imagery belong to Google and are pulled from maps.google.com. The data is extracted from the 2000 United States Census and can be downloaded from www.census.gov.

Geographic Information Systems (GIS) software relies on data sets that cover the whole planet. To cope with the flood of GIS data and their formats, programmers have created several open source libraries and GIS suites. This article gives a short introduction to the range and depth of GIS tools and libraries available for UNIX® and Linux®.

EDINA is actively seeking global and regional geographic datasets which can be made available to the UK Higher and Further Education community. Many global datasets are now being published via web map servers and are accessible through the use of interoperability standards. EDINA have created a Web Map Viewer, which will allow anyone with Internet access to view geographic data available through web map servers around the World.

Census page listing Hurricane Katrina related info.

List of data sets available from USUS. Huge and quite up to date.

List of data sets available from USUS. Huge and quite up to date.

he World Health Organization Collaborating Center for Remote Sensing and GIS for Public Health (WHOCC) at LSU is dedicated to the application and advancement of geographic information science (GISc) and geographic technologies for Public Health and disease modeling.

Federal Gateway to information about Katrina in New Orleans. Includes maps, GIS data, interactive mapping packages, etc.

Collection of data and maps from UCGIS related to Katrina and New Orleans