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A Comprehensive Guide to
State and Nationwide GeoData Clearinghouses for the United States
| Geographic Area of Coverage | Site Link | Description |
| Alabama | Alabama GIS | This site provides for scientifically based analyses and decision-support tools for a wide variety of technical and non-technical stakeholders. Geographic information related to the mineral, energy, water, biological and other natural resources of Alabama |
| Alaska | Alaska Geospatial Data Clearinghouse | This is a collection of links to sites that offer free downloads of Alaskan geographic data. |
| Arizona | Arizona Land Resource Information System:Â | GIS data for the State of Arizona. Datasets cover a wide range of topics, including: Indian Reservations, Preserve Initiative, Soils, Towns, Census blocks, Congressional Districts, Counties, DEMs, DRGs, Geology, Vegetation and Hydrology. Data is free for public agencies, otherwise there is a nominal charge. |
| Arkansas | Arkansas | Catalog of Digital Geospatial Data: Data from this site includes cadastral, geopolitical, hydrology, imagery, infrastructure, physical geography, socioeconomic |
| Arkansas | Arkansas, Natural State Digital Database (NSDD) | The Natural State Digital Database (NSDD) was developed by the Spatial Analysis Laboratory (SAL) to serve the GIS user community and the state of Arkansas. This web site is a reality because of the work of the SAL, along with other people in the state who feel there should be a site in Arkansas to obtain free base GIS data. The site contains more than 100 GB of data that can be downloaded free. The following data set groups are available. Arkansas County Data Layers Arkansas State Data Layers Arkansas Digital USGS Quadrangle Maps (DRGs) Arkansas USGS Digital Orthographic Quads (DOQs) GPS Base Station Data |
| California | California Environmental Information Catalog: | This database provides information about geographic information resources in an effort to improve their efficient use through information sharing. Includes metadata information from cities, counties, utilities, state and federal agencies, private businesses and academic institutions that have California environmental information and spatial data resources. |
| California | California Farmland Mapping & Monitoring Program | Download digital spatial data, statistics, and reports on agriculture and farming for the State of California. |
| California | California Fire & Resource Assessment Program:Â | The California Dept. of Forestry and Fire Protection, Fire and Resource Assessment Program makes every effort to provide its data to the public free of charge in a format that is useable by the largest number of potential users. Downloads available include: 1:100K, 1:250K, 7.5'Quads, bioregions, ranger units, change detection programs, fire management environments, vegetation, rainfall, demographics. |
| California | California State Land Commission | Public data layers and software downloads covering biological geography, cultural geography, economic geography and physical geography for the State of California. |
| California | California Statewide Database | Census and voter registration data for the State of California. Search for data by geographic area, or election. Most data are available in shape file format. |
| California (City of Redding) | City of Redding, GIS Division | This is a portion of the City of Redding basemap, containing approximately 6,900 parcels in shapefile format. The datum used is California State Plane Zone 1, NAD 27. |
| California (City of San Diego) | San Diego Association of Governments GIS | GIS data layers for the greater San Diego area. SANDAG maintains extensive databases of facts and figures from a historical perspective, current information, and forecasted information. The information encompasses population growth, housing, employment, and income as well as data on crime and the local economy. |
| California (City of San Francisco) | The San Francisco Bay Area Demonstration GIS Project | The San Francisco Bay and the Delta comprise a rich and diverse coastal ecosystem. Draining over 40% of California, it is the largest estuary on the West Coast. The Bay and Delta support over 130 species of fish. San Francisco Bay is home to three major ocean shipping ports. In marine transportation, the Bay is the fifth largest U.S. port in crude oil handling and the fourth largest container port. Urban-associated development, land-based pollution sources, and water-allocation activities have reduced the quality and quantity of the Bay's aquatic habitat. |
| Chicago | Chicago Area Geographic Information Study | Geospatial data for the Greater Chicago, Illinois area. |
| Colorado (Mesa County) | Mesa County GIS | GIS data about Mesa County, Colorado |
| Connecticut | Univ. Connecticut - Map and Geographic Information Center | This site provides spatial data for the State of Connecticut covering a wide area of subjects on the state, county, town and quad level. |
| Connecticut | Connecticut - EPA - Environmental & GIS | |
| Delaware | Delaware Spatial Data Clearinghouse | The Clearinghouse includes a searchable database of metadata compliant with Federal Geographic Data Committee (FGDC) standards. Metadata entries provide detailed descriptions of the content and sources of the data, often including direct hypertext links to the data sets. Data and documentation have been contributed primarily by State and local government agencies. |
| Delaware | Delaware State DRG and DLG Server Homepage | |
| Massachusetts (City of Fitchburg) | City of Fitchburg, MA Home Page | Fitchburg Massachusetts, a city of approximately 40,000 population, provides GIS data for Fitchburg and Leominster MA in Arc/Info export format and shape files, including parcels, building footprints, wards, zoning, fire hydrant, etc. |
| Florida - Agriculture | Florida Data Directory | The Florida Data Directory (FDD) is a digital library of metadata for Florida geographic information assets. An extensive database on topics ranging from Agriculture to Wetlands. |
| Florida - Environmental | FDEP GIS Homepage | GIS as an effective tool for Florida's environmental decision making efforts. Department GIS activities, services, and data directory download. With state, national, and world links to additional GIS sites. |
| Florida – Geographic Data Library | Florida Geographic Data Library | GeoPlan Center, University of Florida |
| Florida (Broward County) | Broward County Florida | The map room contains a variety of GIS information for Broward County including:e00 files, tif/tiff files, dxf files and a variety of text and pdf files. Offerings will be expanded over the next few months to include more coverages, air photography for the entire county, and additional socioeconomic and environmental data sets. |
| Florida (Palm Beach County) | Palm Beach County GIS | View maps and download free data for Palm Beach County, Florida. |
| Florida (Seminole County) | Seminole County GIS | Seminole County GIS makes available over 60 layers of data for free download. This data comprises both large scale data layers built on our parcel base (land use, zoning, address data, street network) as well as small scale layers utilized for planning purposes (soils, wetlands, contours, hydrography). |
| Florida (Volusia County) | Volusia County GIS | Learn about GIS and download from an extensive collection of data for Volusia County, Florida. |
| Georgia | Georgia GIS Data Clearinghouse | Offers a very large collection of free data sets for Georgia. |
| Georgia | Georgia Tech Center for Spatial Analysis Technologies | |
| Virginia (Hampton) | City of Hampton Home Page | Hampton Property Information provides real-time access to all Hampton property by searching on TaxID, Owner Name, or Address. Direct access to GIS layers, Real Estate data and full-color photos of the homes is available from this web site. |
| Hawaii | Hawaii State GIS Program | This site offers downloadable data for the State of Hawaii covering a wide range of topics, including: Physical Features/Basemap Layers, Political Boundaries/Administrative Layers, Natural Resource/Environmental Layers, and Hazard Layers. |
| Idaho | INSIDE Idaho | An interactive numeric and geospatial data engine. Includes geodata, numeric data and interactive mapping. This site will serve as a clearinghouse for the state's spatial and numeric data and hopes to achieve enduring information environments for research and learning, to increase the use of public domain government information by providing easier access, and to improve public knowledge of the new accessibility to resources within INSIDE Idaho. |
| Idaho | Idaho GIS Data | This site offers spatial data information for the State of Idaho. Data available includes Statewide, Remote Sensing and Regional data. |
| Illinois - Natural Resources | Illinois Natural Resources Geospatial Data Clearinghouse | The Illinois Natural Resources Geospatial Data Clearinghouse serves as a gateway to GIS data and imagery for Illinois. Available data sets and documentation (metadata) include: geology, water resources, nature preserves, wildlife areas, land use, political boundaries, roads, census information, Public Land Survey, Digital Raster Graphics files, and 1998/1999 Digital Orthophoto Quarter Quadrangles. |
| Indiana (City of Indianapolis) | Indiana Metropolitan Statistical Area | The Indianapolis Metropolitan Statistical Area consists of nine counties, which include Boone, Hamilton, Hancock, Hendricks, Johnson, Madison, Marion, Morgan and Shelby. These counties all have a high degree of economic and social integration with the nucleus of Marion County, which includes most of the urbanized area of Indianapolis. |
| Iowa | Iowa GIS Clearinghouse | GIS data for the State of Iowa. Includes links to counties, Iowa Department of Transportation, Department of Natural Resources, Cooperative Soil Survey and FEMA Q3 Flood Data. |
| Iowa | Iowa State University Geographic Information Systems Support and Research Facility | The GIS Support and Research Facility is a public computing facility established to support the use of geographic information system (GIS) technology at Iowa State University. The mission of the facility is to provide a high level GIS research support laboratory for students, faculty and staff as well as to provided GIS education and outreach to the ISU community and the state of Iowa. |
| Iowa - Natural Resources | Iowa Geological Survey Bureau | The Natural Resources Geographic Information System (NRGIS) Library is an organized, documented collection of more than 600 geographically referenced databases tailored to the needs of Iowa Department of Natural Resources (DNR) programs. The NRGIS Library is maintained so that staff may research and integrate information more efficiently and, ultimately, make better decisions regarding the management, development and protection of Iowa's natural resources. |
| Kansas | Kansas GIS Initiative Data Access & Support Center | This site provides a collection of various digital spatial information about the the state of Kansas that is necessary to conduct spatial analysis. Includes administrative, DLG, DEM, environmental, FEMA flood data information, as well as, other data and links about Kansas and the region. |
| Kentucky | Kentucky Office of GIS - DRG download | USGS Digital Raster Graphics (DRG) KY State Plane North and South zone NAD 83, US survey feet |
| Kentucky - Environmental | Kentucky Office of Geographic Information | GIS data for the State of Kentucky. Offers downloadable data and imagery, including: Digital Orthophotos, DRGs, Elevation, Transportaion, Boundaries, Hydrography, Landcover, Soils, Geology, Climate, Food. |
| Kentucky - Natural Resources | Kentucky Natural Resources | Geologic, hydrologic, and miscellaneous gis data related to the natural resources of Kentucky. |
| Louisiana | Louisiana Population Data Center | This site offers population data for Louisiana. Information available includes Labor Market Geographies, State Population Projections to 2020, State Hispanic Population Estimates, and Parish Population Estimates by Age Groups |
| Louisiana | The Louisiana Statewide GIS Atlas | Contains GIS and mapping data on the state of Louisiana. |
| Maine | Maine Data Catalog | Maine GIS Data Catalog |
| Massachusetts | Massachusetts GIS | Large dataset collection for the State of Massachusetts. Includes Image Data, Vector Data, Infrastructure, Topography, Physical Resources, Hydrography, Conservation/Recreation, Regulated Area, Environmental Monitoring, Coastal and Marine Features, and Demographics. |
| Michigan | Michigan Data and Maps - University of Michigan | The University of Michigan Map Library contains a wide array of cartographic materials, including maps, atlases, gazetteers, and geographical dictionaries, and is also a campus resource center for Geographic Information Systems (GIS), providing access to software and data in support of this technology. The Map Library is available to the students, faculty, and staff of the University of Michigan, and also to visitors from outside the University. |
| Minnesota | Minnesota Geographic Data Clearinghouse | Provides information and links to available geographic data for the State of Minnesota. |
| Minnesota (Minneapolis - St. Paul) | Minnesota MetroGIS DataFinder | MetroGIS (www.metrogis.org) is a GIS collaborative serving the seven county, Minneapolis-St. Paul Metropolitan Area. MetroGIS’ functions focus on eighteen coordination activities, one of which is supporting an Internet-based GIS data search and retrieval tool. MetroGIS’ DataFinder includes not only data holdings of its stakeholder organizations but also regional data sets developed by or for the collaborative. Thirteen priority business information needs, common to all MetroGIS stakeholder organizations, currently guide development of the regional data sets. These data sets also have a many-to-one relationship with corresponding business information needs. All metadata records comply with the Minnesota's FGDC-compatible metadata content guidelines. |