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GIS Data

Find datasets for GIS mapping applications recommended by the library's subject specialist. It features current and historical data in the library’s collections and in public repositories.

The States

This table not only gives link to data you can download, but it also gives links to states where they have created their own mapper. You pick from the data available and map it. You then have a choice of saving the resulting map and/or printing it. Not every state has a mapper, but where they do, a link is provided.

Please note: you cannot cross state lines when using one of the mappers.

State Data Download Map Viewer
State GIS Data Sites
Alabama Geospatial/GIS Data for Alabama  
Alaska Alaska State Geo-spatial Data Clearinghouse

Arizona State Cartographer's Office


Arkansas Arkansas State Site Selection Arkansas GIS Viewer
California State of California Geoportal Geoportal Viewer
Colorado GIS Data Webmap Gallery
Connecticut DEEP, Maps & GIS Data, CT GIS Data (UConn)
Delaware FirstMap Data FirstMap
District of Columbia DC Open Data DC Atlas Plus
Florida FL Geographic Data Library
Georgia GA GIS Data Clearinghouse GaSDI
Hawaii HI GIS Data Statewide GIS
Idaho Inside Idaho Interactive maps
Illinois IL GIS Clearinghouse
Indiana Data from IndianaMap IndianaMap
Iowa GIS Data Repository
Kansas Kansas Data Catalog KS DASC Maps
Kentucky Kentucky Geoportal Mapping Galleries
Louisiana Atlas: The Statewide GIS
Maine MOGIS Data Catalog
Maryland Maryland iMap
Massachusetts MassGIS Oliver

MI GIS Open Data Portal

State of Michigan GIS Open Data

MI Mapper
Minnesota MGDC: GIS Data MN Mapper
Mississippi MS Geospatial Clearinghouse MS Viewer
Missouri MSDIS Geoportal MCDC Mapper
Montana MT Geographic Information Clearinghouse Map Gallery
Nebraska NebraskaMap

Landscape Ecology Nevada Geospatial Data (EPA)

Nevada Natural Heritage Program

BLM GIS Data for Nevada

New Hampshire GRANIT GRANITView
New Jersey NJDEP GIS Data Interactive Mapping
New Mexico NM RGIS Data
New York NYGIS Clearinghouse
North Carolina NC OneMap NC OneMap Data Explorer
North Dakota North Dakota GIS North Dakota GIS Hub Explorer
Ohio GEOhio Spatial Data Discovery Portal
Oklahoma OK GIS Data OK Maps
Oregon Oregon Geospatial Data Clearinghouse
Pennsylvania PASDA Online Mapping
Rhode Island RIGIS Geospatial Data Catalog
South Carolina SCGIS
South Dakota SD GIS
Tennessee TN GIS
Texas Texas NRIS Maps & Data
Utah Utah AGRC
Vermont Vermont Center for Geographic Information VT Interactive Map Viewer
Virginia Statewide Data (Virginia Tech)
Washington WAGDA
West Virginia WVGISTC GIS Data Clearinghouse Map West Virginia
Wisconsin WiscLINC WiscMap
Wyoming WyGISC GeoData

Thanks to Linda R. Zelmer, Map Librarian at Western Illinois University for the online atlas part of this list.