GIS Maps

What is a GIS?

A GIS is a computer system capable of capturing, storing, analyzing, and displaying geographically referenced information; that is, data identified according to location. Practitioners also define a GIS as including the procedures, operating personnel, and spatial data that go into the system.

Nationwide GIS Mapping

• United States National Atlas

GIS Mapping by State

• Alabama
• Alabama Metadata Portal
• Alabama Water Quality Information System
• Alaska
• Alaska Geospatial Data Clearinghouse
• Arizona
• Arizona Electronic Atlas
• Arkansas
• Arkansas GIS Gateway
• Arkansas AR-GAP
• California
• California Spatial Information Library (CaCIL)
• California Land Use Planning Information Network (LUPIN)
• Northern Sierra Nevada GIS
• Colorado
• Southwestern Colorado Data Center
• Conneticut
• Map and Geographic Information Center (MAGIC)
• Connecticut Department of Environmental Protection
• Delaware
• Delaware Spatial Data Clearinghouse
• Florida
• Florida Geographic Data Library
• Georgia
• Georgia Spatial Data Infrastructure
• Hawaii
• City & County of Honolulu Dept. of Planning and Permitting
• State of Hawaii Office of Planning GIS
• Idaho
• Inside Idaho
• Idaho Department of Water Resources
• Illinois
• Illinois Natural Resources Geospatial Data Clearinghouse
• Indiana
• Indiana GIS Initiative
• Iowa
• Iowa Geographic Information Council (IGIC)
• Kansas
• Kansas Geospatial Community Commons
• Kentucky
• Kentucky Geological Survey
• Kentucky Office of Geographic Information (KYGI)
• Louisiana
• Atlas: The Louisiana Statewide GIS
• Louisiana Geographic Information Center (LAGIC)
• Maine
• Maine Office of GIS
• Maryland
• Maryland Historical Trust
• Massachusetts
• Massachusetts GIS
• Michigan
• Michigan Center for Geographic Information
• Minnesota
• Minnesota Geographic Data Clearinghouse
• Minnesota Legislative Geographic Information Services
• Mississippi
• Mississippi Automated Resource Information System (MARIS)
• Missouri
• Missouri Spatial Data Information Service (MSDIS)
• Montana
• Natural Resource Information System (NRIS)
• Nebraska
• Nebraska Geospatial Data Bank
• Nevada
• Nevada Bureau of Mines & Geology
• New Hampshire
• New Hampshire GRANIT
• New Jersey
• New Jersey Geographic Information Network (NJIN)
• New Jersey Dept. of Environmental Protection, GIS
• New Mexico
• New Mexico Resource Geographic Information System (RGIS)
• New York
• NYC OASIS
• BYTES of the BIG APPLE
• Cornell University Geospatial Information Repository (CUGIR)
• NY State GIS Clearinghouse -
• NYS Office of Cyber Security & Critical Infrastructure Coordination Orthoimagery Interactive Mapping Gateway
• North Carolina
• North Carolina Geographic Data Clearinghouse
• NCSU Libraries County GIS Data
• North Dakota
• North Dakota Geographic Information Systems (NDGIS)
• Ohio
• Ohio Geographically Referenced Information Program (OGRIP)
• Oklahoma
• Oklahoma Center for Geospatial Information
• Oklahoma State GIS Council
• Oregon
• Oregon Geographic Data Clearinghouse (OGDC)
• Pennsylvania
• Pennsylvania Spatial Data Access (PASDA)
• Penn State University Libraries Maps & Data: Interactive Data Sources
• Rhode Island
• University of Rhode Island Natural Resource and Environmental Management
• South Carolina
• South Carolina Dept. of Natural Resources GIS Data Clearinghouse
• South Dakota
• South Dakota Geological Survey Program
• Tennessee
• Tennessee Spatial Data Server
• TNMap
• Texas
• Texas Natural Resources Information System (TNRIS)
• Texas Water Development Board
• Utah
• Utah GIS Portal
• Vermont
• Vermont Center for GIS (VGIC)
• Virginia
• Virginia Geographic Information Network
• Washington
• Washington State Geographic Information Council (WSGIC)
• Washington State Dept. of Natural Resources GIS
• West Virginia
• West Virginia State GIS Technical Center
• Wisconsin
• Wisconsin Land INformation Clearinghouse (WISCLINC)
• Wyoming
• Wyoming Geographic Information Science Center

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