This web site will allow you to download the boundaries and layers of different countries, in Arc/INFO export format, from ESRI's Digital Chart of the World data set.
ESRI provides a full spectrum of ready-to-use geospatial data products delivered either as a Web Service or as packaged media.
National Geospatial Data Clearinghouse.
A geospatial data depository which provides access to some free and some fee based data.
A global network of geographic information users and providers managed by ESRI. Most of the data available on this site is free.
A list of internet resources from the Earth Sciences & Map Library at Berkeley.
GIS information portal, formerly the About.com Guide to GIS. The site provides introductory text for issues relating to GIS as well as pointers to further information.
The TerraServer from MSN contains over 3 terabytes of high resolution USGS aerial imagery and USGS topographic maps available for download.
The Cartographic Modeling Lab (CML) specializes in spatial analysis using Geographic Information Systems (GIS) technology. This website offers related resources, and also showcases the projects the CML has produced.
E-resource guide form Penn Libraries.
Guide to GIS web resources from Penn Libraries
Pennsylvania Spatial Data Access (PASDA) is the official public access geospatial information clearinghouse for the Commonwealth of Pennsylvania
To support the research needs of Penn faculty, students and staff, the University of Pennsylvania Libraries acquire and subscribe to numerical and geospatial data resources in print and electronic formats.
The Alexandria Digital Library (ADL) is a distributed digital library with collections of georeferenced materials.
The CSISS seeks to develop unrestricted access to tools and perspectives that will advance the spatial analytic capabilities of researchers throughout the social sciences.
Environmental Resources Spatial Analysis Center
An independent research consortium dedicated to basic research and education in geographic information science and its related technologies, including geographic information systems (GIS).
List of geography resources online.
The University Consortium for Geographic Information Science emphasizes the multidisciplinary nature of GIS and the need for balance and cooperation among the disciplines.
Provides, free of charge, aggregate census data and GIS-compatible boundary files for the United States between 1790 and 2000.
The geographic information analysis (GIA) core of the Population Research Institute (PRI) was created in 1996. The GIA Core supports spatial demographic research in eight areas.
The overall objective of the Spatial Analysis Unit is to promote the use of spatial data and tools in state-of-the-art population research.