Online spatial data by State

Alabama | Alaska | Arizona | Arkansas | California | Colorado | Connecticut | Delaware | District of Columbia | Florida | Georgia | Hawaii | Idaho | Illinois | Indiana | Iowa | Kansas | Kentucky | Louisiana | Maine | Maryland | Massachusetts | Michigan | Minnesota | Mississippi | Missouri | Montana | Nebraska | Nevada | New Hampshire | New Jersey | New Mexico | New York | North Carolina | North Dakota | Ohio | Oklahoma | Oregon | Pennsylvania | Rhode Island | South Carolina | South Dakota | Tennessee | Texas | Utah | Vermont | Virginia | Washington | West Virginia | Wisconsin | Wyoming

Alabama

• Geological Survey of Alabama & State Oil and Gas Board
• USGS Alabama Water Science Center

Alaska:

• Alaska Division of Geological & Geophysical Surveys
• Alaska State Geospatial Data Clearinghouse
• Inforain: Glacier Bay Ecosystem GIS
• USGS Alaska Geospatial Data Clearinghouse
• USGS Alaska Science Center

Arizona

• Arizona Geographic Information Council
• Arizona Land Resource Information System (ALRIS)
• Arizona Regional Image Archive
• Geographic Information Systems (GIS) at the University of Arizona Library: Spatial Datasets

Arkansas

• Arkansas Crime Information Center
• Arkansas Department of Health
• Arkansas GAP
• Arkansas Geographic Information Office
• EPA in Arkansas
• Mapping Agricultural Landuse in the Mississippi Alluvial Valley of Arkansas
• National Agricultural Statistics Service: Arkansas County Estimates
• University of Arkansas Center for Advanced Spatial Technologies
• University of Arkansas Center for Business and Economic Research
• University of Arkansas at Little Rock Institute for Economic Advancement: Census State Data Center

California

• Alexandria Digital Library: NGDA Globetrotter
• California Environmental Resources Evaluation System: California Environmental Information Clearinghouse and LUPIN
• California National Resources Agency
• California State Lands Commission
• City of Sacramento: Maps and Geographic Information Systems
• Northern California Earthquake Data Center
• Northern Sierra Nevada Geographic Information Systems
• Russian River Pathogen Project: Data

Los Angeles

• City of Los Angeles: Interactive City Maps
• Metro Developer
• Los Angeles County Department of Regional Planning: Maps & GIS Data

San Diego

• SANDAG: GIS Downloads
• San Diego Fire Recovery Network: GIS Data Center
• San Diego State University Department of Geography: GIS Clearinghouse
• SanGIS

San Francisco Bay Area

• San Francisco Enterprise GIS Program
• USGS San Francisco Bay Area Regional Database (BARD)
• Association of Bay Area Governments (ABAD): Data Center
• DataSF

Colorado

• Colorado Department of Natural Resources
• Colorado Department of Public Health and Environment: Geographic Information Systems (GIS)
• Colorado Department of Transportation: Statistics, Maps & Data
• SouthWest Data Center

Connecticut

• Connecticut Department of Economic and Community Development: Connecticut Maps
• Connecticut Department of Energy & Environmental Protection: GIS Data
• Connecticut Department of Transportation: Maps
• University of Connecticut Map and Geographic Information Center

Delaware

• Delaware DataMIL
• Delaware Spatial Data Clearinghouse
• University of Delaware Research & Data Management Services
• University of Delaware Spatial Analysis Lab

District of Columbia

• District of Columbia Geographic Information System (DC GIS)

Florida

• Florida Department of Environmental Protection: GeoData Directory
• Florida Department of Environmental Protection: Land Boundary Information System (LABINS)
• Florida Department of Transportation: Geographic Information System (GIS)
• Florida Geographic Data Library (FGDL)

Georgia

• Georgia Spatial Data Infrastructure (GaSDI)
• USGS Center for Spatial Analysis Technologies

Hawaii

• Hawaii State GIS Program
• Honolulu Land Information System (HoLIS)

Idaho

• Idaho Department of Water Resources
• Idaho Geospatial Office

Illinois

• Chicago Area Geographic Information Study (CAGIS)
• City of Chicago: Geographic Information Systems
• Illinois Department of Natural Resources (DNR)
• Illinois Natural Resources Geospatial Data Clearinghouse
• Illinois State Museum (ISM) GIS Laboratory

Indiana

• Indiana Geographic Information Council
• Indiana Geological Survey
• Indiana Spatial Data Portal

Iowa

• Iowa Department of Natural Resources: Geographic Information Systems Library
• Iowa Geographic Information Council
• Iowa State University: Geographic Information Systems Support and Research Facility

Kansas

• Kansas Data Access & Support Center (DASC)
• Riley County Community GIS Website

Kentucky

• Kentucky Division of Geographic Information

Louisiana

• Atlas: the Louisiana Statewide GIS, including LIDAR and DOQQ 2004
• City of New Orleans: Data
• Greater New Orleans Community Data Center
• FEMA: Louisiana Katrina Flood Recovery
• Katrina Mapping System
• LAGIC Hurricane Response Mapping
• Louisiana Geographic Information Center
• Louisiana Oil Spill Coordinator's Office (LOSCO): Data Catalog
• NOAA Hurricane Katrina Flood Maps

Maine

• Maine Office of GIS Data Catalog

Maryland

• Baltimore City Residents Portal: Online Maps
• Maryland Department of Natural Resources: GeoSpatial Data Center
• Maryland Historical Trust
• Maryland's Environmental Resources and Land Information Network (MERLIN)

Massachusetts

• The Boston Atlas
• Boston Region Metropolitan Planning Organization: Data Resources
• City of Boston: Assessing Online
• City of Cambridge: Geographic Information System
• City of Cambridge: Property Database
• Federal Reserve Bank of Boston: Foreclosure Rates in Massachusetts cities and Towns (1990-2007)
• MassBenchmarks
• Massachusetts Cultural Resource Information System (MACRIS)
• Massachusetts Department of Transportation: Road Inventory Downloads
• Massachusetts Department of Transportation: Traffic Volume Counts
• Massachusetts Executive Office of Energy and Environmental Affairs: Smart Growth and Urban Environments
• MassGIS
• MetroBoston DataCommon
• Town of Brookline: GIS Home
• USGS Woods Hole Science Center: Data Archives

Michigan

• City of Detroit: GIS Maps
• Michigan Department of Technology, Management & Budget: Center for Geographic Information
• Michigan Resource Inventory Program (MRIP)
• University of Michigan Spatial and Numeric Data Services (SAND)

Minnesota

• Minnesota Geospatial Information Office (MnGEO)
• Minnesota Legislative Coordinating Commission: Geographic Information Services

Mississippi

• FEMA: Mississippi Katrina Flood Recovery
• Mississippi Automated Resource Information System (MARIS): Data Dictionary
• Mississippi Coordinating Council for Remote Sensing and Geographic Information Systems
• Mississippi Geospatial Clearinghouse

Missouri

• Missouri Spatial Data Information Service (MSDIS)

Montana

• EPA in Montana
• Montana Geographic Information Clearinghouse
• USGS Montana Water Science Center

Nebraska

• City of Lincoln and Lancaster County Geographic Information Systems Map Shop
• Nebraska Department of Natural Resources
• Nebraska Game and Parks Commission
• University of Nebraska-Lincoln Center for Advanced Land Management Information Technologies (CALMIT)

Nevada

• Nevada Bureau of Mines and Geology
• Northern Sierra Nevada Geographic Information Systems
• Virtual Clearinghouse for Nevada Geographic Information

New Hampshire

• NH GRANIT: New Hampshire's Statewide GIS Clearinghouse

New Jersey

• Monmouth County Planning Board
• New Jersey Bureau of Geographic Information Systems
• New Jersey Department of Transportation
• New Jersey Geographic Information Network
• New Jersey Geological and Water Survey
• New Jersey Office for Planning Advocacy
• New Jersey Transportation Planning Authority

New Mexico

• New Mexico Geographic Information Council (NMGIC)
• New Mexico Resource Geographic Information System Program (RGIS)

New York

• Cornell University Geospatial Information Repository
• Map New York
• New York City Coalition Against Hunger (NYCCAH)
• New York City Department of City Planning: BYTES of the BIG APPLE
• New York State GIS Clearinghouse
• NYC Open Data

North Carolina

• North Carolina Center for Geographic Information and Analysis
• North Carolina Department of Transportation

North Dakota

• North Dakota State Data Center
• North Dakota Geographic Information Systems

Ohio

• Ohio Department of Natural Resources (ODNR)

Oklahoma

• Oklahoma Center for Geospatial Information
• University of Oklahoma Center for Spatial Analysis

Oregon

• BLM Oregon and Washington
• H.J. Andrews Experimental Forest
• Humbolt State University Library
• Metro: Data Resource Center
• Oregon Climate Service
• Oregon Department of Forestry
• Oregon Geospatial Data Clearinghouse
• Tillamook County, Oregon

Pennsylvania

• Pennsylvania Mapping and Geographic Information Consortium (PAMAGIC)
• Pennsylvania Spatial Data Access (PASDA)

Rhode Island

• Rhode Island Geographic Information System (RIGIS)

South Carolina

• South Carolina Department of Natural Resources
• University of South Carolina GIS Data Server

South Dakota

• South Dakota Geological Survey

Tennessee

• Tennessee Spatial Data Server
• TNMap

Texas

• City of Austin GIS Data Sets
• City of Houston Geographic Information & Management System (GIMS)
• Dallas City Hall
• Houston-Galveston Area Council
• North Central Texas Council of Governments (NCTCOG)
• Texas Commssion on Environmental Quality
• Texas General Land Office
• Texas Natural Resources Information System (TNRIS)
• Texas Water Development Board
• University of Texas at Austin Perry-Castañeda Library
• University of Texas at Austin School of Architecture
• USGS Texas Water Science Center

Utah

• Utah Department of Natural Resources
• Utah Division of Water Rights
• Utah GIS Portal

Vermont

• Vermont Center for Geographic Information

Virginia

• Virginia Coast Reserve Long-Term Ecological Research (LTER)
• University of Virginia Scholars' Lab

Washington

• BLM Oregon and Washington
• ONRC Clearinghouse for the Olympic Peninsula
• Washington State Department of Ecology
• Washington State Department of Natural Resources
• Washington State Geographic Information Council (WAGIC)
• Washington State Geospatial Clearinghouse
• Washington State Geospatial Data Archive

West Virginia

• Map West Virginia (MapWV)
• West Virginia GIS Technical Center
• West Virginia Department of Environmental Protection

Wisconsin

• Wisconsin Land Information Clearinghouse (WiscLINC)
• Wisconsin Department of Natural Resources
• Wisconsin State Cartographer's Office

Wyoming

• Wyoming Geographic Information Science Center (WyGISC)
• USGS Wyoming Water Science Center
• Wyoming Geographic Information Systems (GIS) Coordination Program
• Wyoming Water Resources Data System (WRDS)
• Wyoming Statewide Water Resources Data Inventory
• Teton County Geographic Information System