3D landscape visualization for MAXON CINAMA 4D: Offers wire-meshes for the rendering software MAXON CINEMA 4D taken from the GTOPO30 dataset of the U.S. Geogical Survey. Also provide matched satellite images textures from NASA.
@City Inc: iStreetView - 360-degree Geocoded Street level Imaging on the Web
Aerial photography and satellite imagery: Company sells 1 foot orthoimagery and LANDSAT satellite imagery.
American Digital Cartography, Inc.: Providers of digital mapping data for use with CAD and GIS systems.
Baltic Sea GIS, Maps and Statistical Database: GIS data of land cover, population and other information for the Baltic Sea drainage basin.
Census Watch: ESRI sponsored clearing house, providing information about US census tract TIGER data availability and modifications.
Colorado Office of Emergency Management: Cartography and Mapping: State and local government oriented GIS data.
Community Cartography: An Internet mapping service and spatial data warehouse.
Community Mapping Network: Created to share a wealth of natural resource information and maps with communities in British Columbia, Canada. Allows users to add data.
Digital Chart of the World: Download the boundaries and layers of different countries, in Arc/INFO export format.
Digital Data Technologies, Inc (DDTi): Road centerline and address base mapping for GIS and E9-1-1.
Doyle's GIS Info Page: Information about GIS and Links to GIS site for mostly free data for the USA.
Earthmaps: Data, travel maps, recreation, and earth science applications.
Energisite.com: Internet delivery of online digital and raster well logs, well data, GeoCadd culture, and Analytical software using esri and AutoDesk MapGuide and AnGIS technologies.
Forest Spatial Information Catalog: The Forest Spatial Information Catalog (FSIC) is a central repository for forest related spatial metadata.
Geographic Data Technology: Digital map database compiler focused on the Americas.
GeographX Digital Mapping: New Zealand land information and GIS services. Site offers some free data.
Geosign Corporation: Provides geographic data for franchises and yellow-pages listed companies.
Geospace: Provides spatial data services.
GIS Data Depot: Provides free GIS data downloads and creates custom spatial data CD-ROMs.
GIS Express: Offers satellite and aerial images.
Go Spatial Limited: Producer of digital geographic data suitable for reference base mapping at global, regional or national levels.
GTOPO30 - Global Topographic Data: Digital elevation model (DEM) developed to meet the needs of geospatial data users for 30-arc second elevation data.
Hawaii Statewide GIS Program: Free downloadable GIS spatial data, metadata, and maps.
Infoshare: Community Data on New York City: Profile and compare neighborhoods, and produce original tables.
Kansas Geospatial Community: State of Kansas Data access and support center (DASC). DASC catalogues, archives, and distributes databases with FGDC compliant metadata and direct FTP access.
Louisiana Statewide GIS: Contains GIS and mapping data on the state of Louisiana.
MapFocus GeoTIFFs: Digital raster graphics for GIS and CAD applications. Includes continental US coverage, full resolution topography.
MASDEC GIS: Contain oceanographic data for the Straits of Malacca, Malaysia.
Metart: ARTEMIS and AGROMET data and information. Satellite images, meteorological data and related tools.
microDATA GIS: Spatial databases and enhanced 911 (E911) mapping and database solutions.
National Geospatial Data Framework - United Kingdom: Geospatial data infrastructure for the United Kingdom. Runs the UK Standard Geographic Base.
National Spatial Information Framework - South Africa: Geospatial data infrastructure for South Africa.
New York State GIS Clearinghouse: Operated by the New York State Office for Technology. Provides access to the New York State GIS Metadata and Data Repository.
NOS Data Explorer: Offers interactive mapping tools that allow users to locate NOS products in any area in the United States and its territories through a metadata catalog.
Perfect SRTM Project: SRTM is a 90m-resolution global elevation database.
Rainwater Basin GIS data site: This site provides free GIS data sets pertaining to the Rainwater Basin wetlands in Nebraska.
Rhode Island GIS: Data clearinghouse for the state of Rhode Island.
Tennessee Spatial Data Server: GIS data for the state of Tennessee. DOQQs, DRGs, DEMs, boundaries, wetlands, and geology.
Texas Natural Resources Information System: Clearinghouse for natural resources and GIS data. Online holdings include DOQs, DEMs and many vector datasets.
The Climate Source: Distributor of spatial climate data developed by Oregon State University's PRISM mapping program.
The Data Depot: A catalogue of European mapping, geocoding and geodemographic data sets for use in GIS software.
The DataStore: Offers downloadable digital GIS data and maps.
The Global Landsform Database: Offers downloadable maps including GIS, 3D and state maps with free preview.
Transnational Wadden Sea Information Service: Indices, GIS datasets and data source holders in countries around the Wadden Sea.
TTI Production - Remote Sensing and Image Processing: Specific geographic databases compatible with the majority of the GIS of the market.
United States National Atlas: Map layers available to the public.
University Library Digital Spatial Data Catalog: Searchable catalog of data/metadata managed by Numeric and Spatial Data Services at the University of Michigan Library
USGS Geography: National mapping information from the U.S. Geological Survey. A good place to start the search for many kinds of GIS data.