Maps and GIS Resources: United States, by State

Sites with State-by-State Data Available:

• U.S. Environmental Protection Agency Search Where You Live
• US Geological Survey Search by State - An interactive search by state for information.
• US Government Search for State EPA
• ESRI - Census 2000 TIGER/Line Data available for download.

Pacific Northwest Regional Data Sources:

• NOAA Pacific Coast Land Cover Data
• Interior Columbia Basin Ecosystem Management Project - Spatial data includes physical, cultural, political, and ecological.
• Northwest Subbasin Geographic Data Browser - Watershed and basin data, endangered species and environmental information, and hydropower data.

State Data:

Alabama:

• Geological Survey of Alabama - Alabama NSDI node with links to downloadable data sets.
• USDA National Forest Service Alabama GIS
• Water Quality GIS
• Water Resources of Alabama - USGS

Alaska:

• Alaska Geological & Geophysical Surveys - A division of the Alaska Department of Natural Resources.
• Alaska State Geospatial Data Clearinghouse - Alaska NSDI node with links to downloadable data sets.
• Alyeska Pipeline Service Co. - Not explicitly a GIS site, but does include much data that could be manually imported into a GIS utility.
• Glacier Bay Ecosystem GIS - The Map Library has a copy of the CD with data, including the Northern Tongass NF.
• NPS Alaska Data Service - Gateway to data sets for all of Alaska's National Park.

Arizona:

• Center for Applied Spatial Analysis (CASA), University of Arizona, applies GIS to research within the College of Social and Behavioural Science.
• Department of Transportation T-Map - Interactive mapping application.
• Arizona Geographic Information Council (AGIC)
• Arizona Land Resource Information System (ALRIS) - Documentation for orderable data sets.
• The Arizona Regional Image Archive - An interdisciplinary resource system for digital image and map data for the Sonoran desert region, including the US Southwest and northern Mexico. Includes over 6,000 DOQQs online.
• Arizona State University Libraries - Library datasets and links to city, county and state data sources.
• Department of Fish and Wildlife, Arizona GIS Datasets
• Southern Arizona Data Services Program
• State Land Department Maps Page

Arkansas:

• Arkansas GIS Resource Center
• Center for Advanced Spatial Technologies, University of Arkansas
• Fayetteville Public Schools GIS Program
• Fish and Wildlife Service GIS for Arkansas

California:

• Association of Bay Area Governments, ABAG, Regional Data Center - Census, employment, retail, zip code data and projections.
• California Geographical Survey, Dept. of Geography, California State University, Northridge - Downloadable census, TIGER and DEM data for California and the US
• California Environmental Resources Evaluation System (CERES) - Developing an electronic system to facilitate access to a variety of spatial and environmental data. Among the many currently available facilities is the CERES Environmental Informational Catalog which allows users to retrieve metadata or GIS data using title, type, organization, or keyword.
• California Spatial Info Library
• California State Lands Commission - Has biological, cultural, economic and physical GIS data for download.
• Shipwrecks Database - Page includes historical information and a database of shipwrecks of the California Coast.
• Bay Area Automated Mapping Association (BAAMA) - Comprehensive list of GIS information for the Bay Area and northern California.
• Land use Planning Information Network (LUPIN) - Searchable index of land use and planning information (clickable map and text interfaces).
• Northern Sierra Nevada Geographic Information
• Russian River Spatial Data - Downloadable habitat-related shapefiles.
• San Diego Association of Governments (SANDAG) - Provides selected digital thematic geographic data layers in ArcInfo export format.
• San Francisco Bay Area Regional Database (BARD) - Access to DEMs, DRGs, DLGs, DRQs, some DOQs for Bay Area Region.
• University of California, Berkeley, Earth Sciences and Map Library GIS data page

Colorado:

• Bureau of Land Management, BLM Colorado GIS page
• University of Colorado-Boulder - Map Library GIS Resources and links.
• Colorado Natural Resources Online
  • Natural Resources Maps by County of Prime Farmland
• Colorado's Department of Local Affairs (DOLA) - GIS development of State Demography Office and the Division of Emergency Management.
• Digital Geologic Map of Colorado - Downloadable data in Arc/Info format.
• GISCO, GIS Colorado - An organization that represents GIS and GIS activities in Colorado.
• Southwestern Colorado Data Center
• US Fish and Wildlife, Colorado GIS data page

Cities and Counties

• Boulder County Land Use GIS page
• Colorado Springs City page with interactive map, City planning GIS viewer, and maps

Connecticut:

• MAGIC (Map and Geographic Information Center) University of Connecticut, Homer Babbidge Library - Downloadable ARC/INFO and MapInfo coverages for a wide variety of themes in statewide, county, quadrangle and city/town data sets. Also northeast Atlantic states data.
• Department of Environmental Protection Environment and Geographic Information Center
• Department of Environmental Protection GIS data

Delaware:

• Delaware Department of Transportation - DelDOT Road Network Files
• Delaware Spatial Data Clearinghouse - Replacing the Delaware Data Inventory, this is Delaware's state supported clearinghouse with links to the Federal Clearinghouse of metadata.
• Delaware State GIS data

Florida:

• Florida Research and Environmental Analysis Center
• PLGDB - Florida State University's Public Library Geographic Database
• Florida Geographic Data Library (FGDL)
• Martin County GIS - Downloadable ARC/INFO export coverages and links to other Florida GIS resources.

Georgia:

• Georgia GIS Data Clearinghouse - The purpose of the Clearinghouse is to collect, document, format, and publish GIS information collected by multiple agencies of Georgia state government.
• Statewide GIS Atlas - Includes GIF and digital data files.

Hawaii:

• City and County of Honolulu Land Information
• State of Hawaii GIS - Hawaii statewide GIS program.

Idaho:

• Idaho Geographic Information Center - Maintained by the Idaho Department of Water Resources. Includes links to other GIS resources in Idaho.
• INSIDE Idaho - Spatial and Numeric Digital Library, includes some DOQQs
• Idaho Geospatial Data Center - Provides downloadable DRGs, DLGs, and DEM files.

Illinois:

• Chicago Area Geographic Information Study - A NSDI node for the Chicago Area.
• University of Chicago Center for Population Economics - GIS site that also provides data for wards and counties, 1870-1930
• Illinois Natural Resources Geospatial Data Clearinghouse Node - NSDI node with downloadable ARC/INFO export files.
• Illinois State Museum GIS Lab

Indiana:

• Indiana GIS Initiative - Statewide coordinating organization and data source.
• Indiana University's GIS Library

Iowa:

• Iowa Department of Natural Resources GIS Library
• Iowa GIS Clearinghouse - Iowa Geographic Information Council
• Iowa State University Geographic Information Systems Support and Research - Has downloadable DRGs in varying scales, as well as other county statewide data sets.

Kansas:

• Kansas Geological Survey - Site includes the Data Access and Support Center (DASC) Data Catalog which includes a database catalog for DEM, DLG, TIGER and other GIS data sets for a wide variety of themes. Online data request forms are available. MrSID compressed orthophotos.

Kentucky:

• Kentucky Geological Survey - The Kentucky Geological Survey has some electronic maps (GIS coverages) and DOQs that are available by FTP downloading. The files are ArcView shapefiles (registered by ESRI). The files were zipped using the WinZip utility. All the datasets, unless explicitly noted, are in latitude and longitude, decimal degrees, NAD83.
• Kentucky Office of GIS - State GIS server with downloadable DRGs, DEMs and other thematic information.

Louisiana:

• Atlas: Louisiana Statewide GIS - Users can display and download a variety of data types and formats. However, the server is not very reliable and is often down for long periods of time.
• Louisiana Geographic Information Center - LAGIC was established by the Louisiana GIS Council (LGISC) and the Louisiana Database Commission(LDBC) to facilitate the distribution of geographic information, provide technical assistance, and support GIS data development among state, federal, and local government

Maine:

• Maine Office of GIS Data Library - Includes listings of statewide data coverage availability and order procedures.

Maryland:

• Canaan Valley Institute GIS Resources
• University of Maryland GIS and Map Library
• Maryland Historical Trust: Geographic Information System
• MSGIC - Maryland State Government Geographic Information Coordinating Committee

Massachusetts:

Michigan:

Minnesota:

• Minnesota Land Management Information Center - Summarized statistical data available in 20 different databases. Boundary files and DOQs. 
• Minnesota Legislative GIS Office - Links to Minnesota information only. 
• ForNet - Program developed by Minnesota Department of Natural Resources and NASA, this innovative site provides a means for viewing various statewide data sets for Minnesota. This site also provides an interactive map browser that allows one to view data from the DNR Forestry database.
• The DNR Data Deli - GIS data from the Minnesota Department of Natural Resources

Mississippi:

• Mississippi Automated Resource Information System (MARIS) - Information on data available for order.
• Mississippi Geospatial Clearinghouse - Enables users to view and download GIS data and maps.

Missouri:

• Missouri Spatial Data Information Service - Downloadable data. Information may be accessed by region. In ARC/INFO export format. MrSID DOQs.

Montana:

• EPA Region 8 GIS Data
• GIS data sets - A huge array of administrative districts, land boundaries, educational, park, electoral divisions, mines, landfills, energy sites, and water stations.
• Montana Natural Resource Information System - From the Montana State Library. Provides access to GIFS, ARC/INFO export files, and documentation for numerous thematic coverages. Spatial freeWAIS search engine allows user to conduct queries for spatial data sets using keyword and coordinate inputs.
• USGS Water Resources of Montana - This site is primarily a source for real time and historic stream data.

Nebraska:

• Center for Advanced Land Management Information Technologies - The UNL Affiliated Research Center is a NASA sponsored program to enhance and enable commercial applications of geospatial technologies including remote sensing, Geographic Information Systems, and the Global Positioning System. The site is currently maintained by the University of Nebraska-Lincoln.
• Nebraska Game and Parks Commission
• Nebraska Natural Resources Commission, GIS Data Library - Form-based queries using scrollable lists allow the user to search for available data sets.
• Nebraska Geospatial Data Clearinghouse - A searchable catalog of information about available, spatially-referenced data covering geographic areas of Nebraska.

Nevada:

• Nevada Bureau of Mines and Geology
• Nevada State Geographic Information Society - Primarily a newsgroup, but does contain some useful links to state agencies.
• Northern Sierra Nevada GIS - Downloadable topographic and county information
• Virtual Clearinghouse for Nevada GIS - This is primarily a jumpstation to GIS sites around Nevada.

New Jersey:

• New Jersey Geological Survey Digital Geodata Archive - Maintained by the State of New Jersey's Department of Environmental Protection.
• New Jersey Geographic Information Network - GDB and shapefiles for NJ municipal and county boundaries
• Princeton University Library Geospatial Data - includes New Jersey DEMs.

New Hampshire:

• New Hampshire GRANIT - State data, links, online mapping and 1998 DOQQs reprojected to NAD83.
• New Hampshire Resource Net - A planning information source with data links.

New Mexico:

• New Mexico Geographic Information Council (NMGIC) - Includes links to cities throughout New Mexico.
• New Mexico Resource Geographic Information System (RGIS) - Extensive data resources including DOQQs, DEMS, Shape files.

New York:

• New York State GIS Clearinghouse - Users can search for data by county, sector, or data theme. A browsable list of available data coverages is also available. This is now also the GIS data source for the NY Department of Transportation (formerly MAGIS, for more info on NYDOT GIS data click here).
• New York City GIS Resources

North Carolina:

• North Carolina Center for Geographic Information and Analysis - Provides information about the North Carolina Corporate Geographic Database.
• NC OneMap - Geospatial data backbone supporting North Carolina data users. It is an organized effort of numerous partners involving local, state, and federal government agencies, the private sector and academia.
• North Carolina State University Libraries GIS - Extensive local and state data links including DOQQs.
• North Carolina State Data Center (SDC)

North Dakota:

• North Dakota State GIS Center - Portal to North Dakota geospatial data and information; collaborative effort by North Dakota state agencies, local government, and private enterprise.
• North Dakota State Data Center - Official source of population and socio-economic statistics. The NDSDC also serves as the state's liaison to the U.S. Census Bureau and as the representative to the Federal State Cooperative Programs for Population Estimates and Projections.

Ohio:

• ODNR Division of Geological Survey
• ODNR Division of Water Programs and Services 
• GIS Support Center - Ohio Department of Administrative Services: DLGs, DRGs, DEMs and DOQQs (MrSID) of Ohio.

Oklahoma:

• Oklahoma Center for Geospatial Information - (Oklahoma State University) Provides access to an FTP site with TIGER data, DLG's, DEM's, LU/LC data, wetlands inventory data, census data, and some DOQs.
• Center for Spatial Analysis - University of Oklahoma GIS site

Oregon:

Please see our State of Oregon GIS Data Page

Pennsylvania:

• Pennsylvania Spatial Data Access - Pennsylvania's NSDI node for GIS data, includes DOQQs.
• Pennsylvania Mapping and Geographic Information Consortium - GIS user group with a number of very good links to governmental agencies throughout the state

Rhode Island:

• University of Rhode Island Natural Resources and Environment - With links to RIGIS and digital orthophoto server.

South Carolina:

• South Carolina Department of Natural Resources - GIS Data Clearinghouse. Hydrological data, stream stage reports, oceonographic data.
• University of South Carolina Spatial Data Resources - Extensive collection physical, cultural, business, regional SE US, orthophotos.

South Dakota:

• South Dakota Geological Survey - Base data of DLGs and some coverage of DOQs available.

Tennessee:

• GISource - Tennessee State Office of Information Resources; official GIS data source.
• Tennessee Federal GIS Data Server - Supported by Tennessee Geographic Information Council; Contains links to GIS data sources for Tennessee.
• Shelby County Division of Planning and Development DPD GIS Viewer - displays zoning districts, land use information, and other GIS data for Memphis and the unincorporated areas of Shelby County. 

Texas:

Utah:

• Utah Automated Geographic Reference Center (AGRC) - Serves as a clearinghouse for Utah and provides services to federal, state, and local governments. Provides information about the State Geographic Information Database (SGID)
• Utah Department of Natural Resources

Vermont:

• Vermont Center for Geographic Information - State GIS data source, including useful links.

Virginia:

• Geospatial Data in Scholars Lab - Maintained by the University of Virginia Library
• GISData.Virginia.gov - State GIS clearinghouse.
• Virginia Geographic Information Network (VGIN) - Virginia Department of Technology and Planning
• Virginia Department of Economic Development GIS Program - MrSID DOQQs and shape files
• Virginia Coast Reserve

West Virginia:

Wisconsin:

• Wisconsin Coastal GIS Applications Project - Joint venture by the University of Wisconsin Sea Grant Institute and the Land Information and Computer Graphics Facility at the University of Wisconsin-Madison.
• Wisconsin Land Information Clearinghouse - A gateway to geospatial data and metadata, related land and resource information, and the Wisconsin agencies which produce or maintain them. Includes a searchable metadatabase.
• Wisconsin Dept. of Natural Resources Geographic Services Section - Information on statewide data sets held by the Wisconsin DNR.
• Wisconsin State Cartographer's Office

Wyoming:

• Wyoming Geographic Information Science Center (WyGISC)
• USGS Water Resources of Wyoming
• Wyoming Water Resources Data System
• Wyoming Statewide Water Resources Data Inventory
• Teton County GIS Archive - Air photography, natural resource, zoning, hazard and other data.
• Teton Conservation District - Includes Snake River Corridor data.