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  GIS Data Sources
by Geographic Region

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Great Lakes Basin
 
ILLINOIS
Illinois Natural Resources Geospatial Data Clearinghouse
Illinois State Geological Survey
This site is a gateway to GIS data and imagery for Illinois. Available data sets and documentation (metadata) include: geology, water resources, nature preserves, wildlife areas, environment, land use, base data, Public Land Survey, political boundaries, roads, census information, and much more.

Land Use Land Cover for Illinois
United States Geological Survey (USGS)
Datasets for the entire state of Illinois at 1:250,000-scale.

USGS Illinois Mapping Products (DLG, DEM, DOQ, DRG)
United States Geological Survey (USGS)
Check the status of several USGS data layers for Illinois and how to obtain them.

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INDIANA
Indiana Spatial Data Portal
Indiana University
This site provides access to over 400 Gigabytes of Indiana GIS data. Most datasets are available to the public for download and have no use restrictions.

Lake Rim GIS
Center for Geospatial Data Analysis at the Indiana Geological Survey (IGS)
The Coastal Coordination Program, Indiana Department of Environmental Management, and Indiana Geological Survey collaborated to develop the Lake Michigan Lake Rim Geographic Information System (GIS). One of the goals for the Lake Rim GIS is to facilitate public access to and analysis of environmental data for Indiana's coastal region.

Land Use Land Cover for Indiana
United States Geological Survey (USGS)
Datasets for the entire state of Indiana at 1:250,000-scale.

Map of Indiana
accessIndiana
Need a map of Indiana for your report or presentation? You can now create a custom map of Indiana that you can print or save as a graphics file to insert into your document.

USGS Indiana Mapping Products (DLG, DEM, DOQ, DRG)
United States Geological Survey (USGS)
Check the status of several USGS data layers for Indiana and how to obtain them.

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MICHIGAN
Census and statistical data for Michigan
State of Michigan

Land Use Land Cover for Michigan
United States Geological Survey (USGS)
Datasets for the entire state of Michigan at 1:250,000-scale.

Map Michigan
Michigan Center for Geographic Information
Map Michigan welcomes you to search and explore various places and points of interest throughout our State.

Michigan Geological Mapping
Michigan Department of Environmental Quality (DEQ)
A cooperative effort to map in detail the surface formations and understand their relationships and characteristics.

Spatial Data Library
Michigan Department of Natural Resources (DNR)
Providing easy access to GIS data in support of holistic ecosystem management.

USGS Michigan Mapping Products (DLG, DEM, DOQ, DRG)
United States Geological Survey (USGS)
Check the status of several USGS data layers for Michigan and how to obtain them.

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MINNESOTA
Air Photos Online
Minnesota Department of Natural Resources (DNR)
Air Photos Online is a digital aerial photography delivery service from Minnesota DNR ForNet. This service allows users to browse, download, and order Minnesota DNR aerial photography products via the Internet.

GIS Data Deli
Minnesota Department of Natural Resources (DNR)
Minnesota DNR's spatial data acquisition site that allows users to download raw computer-readable data for use in their Geographic Information System (GIS), image processing system, or traditional database environment.

Land Management Information Center
Minnesota Planning offers services to improve the effective use of geographic information in Minnesota.

Land Use Land Cover for Minnesota
United States Geological Survey (USGS)
Datasets for the entire state of Minnesota at 1:250,000-scale.

USGS Minnesota Mapping Products (DLG, DEM, DOQ, DRG)
United States Geological Survey (USGS)
Check the status of several USGS data layers for Minnesota and how to obtain them.

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NEW YORK
Cornell University Geospatial Information Repository (CUGIR)
CUGIR is an active online repository in the National Spatial Data Infrastructure program. CUGIR provides geospatial data and metadata for New York State, with special emphasis on those natural features relevant to agriculture, ecology, natural resources, and human-environment interactions.

Land Use Land Cover for New York
United States Geological Survey (USGS)
Datasets for the entire state of New York at 1:250,000-scale.

New York State GIS Clearinghouse
The New York State Geographic Information Systems (GIS) Clearinghouse, operated by the New York State Office for Technology, was established to disseminate information about New York's Statewide GIS Coordination Program and to provide access to the New York State GIS Metadata and Data Repository.

USGS New York Mapping Products (DLG, DEM, DOQ, DRG)
United States Geological Survey (USGS)
Check the status of several USGS data layers for New York and how to obtain them.

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OHIO
GeoData Distribution
Department of Administrative Services
The Office of Information Technology maintains DLGs, DOQQs, DRGs and DEMs for the state of Ohio.

Geographic Information Management Systems (GIMS) Program
Department of Natural Resources (DNR)
Ohio DNR's geographic data access page designed to provide natural resource information to the public in a more efficient and effective manner.

Geographic Information Systems
Ohio Environmental Protection Agency (EPA)
The GIS Unit provides geo-referenced data, geographical analysis and map products to the Division of Surface Water.

Geological Survey Digital Data
Department of Natural Resources (DNR)
This site contains information relating to Ohio geology including related topics such as oil and gas well locations.

GIS Programs
Department of Natural Resources (DNR)
The Division of Water is currently creating Arc/Info coverages of all of the water well location maps for the state of Ohio.

GIS Resource Analysis Section
Department of Natural Resources (DNR)
The Division of Real Estate and Land Management maintains natural resource digital data, maps, and GIS applications.

Land Use Land Cover for Ohio
United States Geological Survey (USGS)
Datasets for the entire state of Ohio at 1:250,000-scale.

USGS Ohio Mapping Products (DLG, DEM, DOQ, DRG)
United States Geological Survey (USGS)
Check the status of several USGS data layers for Ohio and how to obtain them.

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ONTARIO
Canada's National Forest Inventory
A National Forest Inventory is compiled about every five years by aggregating provincial management inventories. Provincial data is summarized to 48,000 aggregation units (consistent with provincial mapsheets), and stored in a relational database management system and a GIS (CanFI).

GeoGratis
Canada's access to geographical data.

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PENNSYLVANIA
Land Use Land Cover for Pennsylvania
United States Geological Survey (USGS)
Datasets for the entire state of Pennsylvania at 1:250,000-scale.

Pennsylvania Spatial Data Access / PA Geospatial Data Clearinghouse
The Pennsylvania Spatial Data Access system (PASDA) is Pennsylvania's official geospatial information clearinghouse and the Commonwealth's node on the National Spatial Data Infrastructure (NSDI).

USGS Pennsylvania Mapping Products (DLG, DEM, DOQ, DRG)
United States Geological Survey (USGS)
Check the status of several USGS data layers for Pennsylvania and how to obtain them.

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QUEBEC
Canada's National Forest Inventory
A National Forest Inventory is compiled about every five years by aggregating provincial management inventories. Provincial data is summarized to 48,000 aggregation units (consistent with provincial mapsheets), and stored in a relational database management system and a GIS (CanFI).

GeoGratis
Canada's access to geographical data.

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WISCONSIN
Catalog of Aerial Photography
Compiled by the Wisconsin State Cartographer's Office, this site has aerial photos for the state by county.

Current Streamflow Conditions
United States Geological Survey (USGS)
Maintained by the USGS - Water Resources of Wisconsin, this site has continually updated streamflow data divided into watershed basins.

Geographic Data Overview
Wisconsin Department of Natural Resources (DNR)
This page lists geographic data holdings of the Wisconsin Department of Natural Resources which have statewide coverage and are available for sharing from the DNR Geographic Services Section (DNR/GEO) without restriction, unless otherwise noted.

Geographic Information Systems (GIS) Services
Wisconsin Department of Administration
Links to GIS data, TIGER files and more.

Land Use Land Cover for Wisconsin
United States Geological Survey (USGS)
Datasets for the entire state of Wisconsin at 1:250,000-scale.

Published Soil Surveys for Wisconsin
Natural Resources Conservation Service (NRCS)
Digital soils data for the state of Wisconsin.

Satellite imagery of Wisconsin and adjacent lakes
Environmental Remote Sensing Center, University of Wisconsin-Madison
Daily MODIS Imagery of Wisconsin, Lakes Superior, and Lake Michigan

USGS Wisconsin Mapping Products (DLG, DEM, DOQ, DRG)
United States Geological Survey (USGS)
Check the status of several USGS data layers for Wisconsin and how to obtain them.

Wisconsin DNR WebView
Wisconsin Department of Natural Resources (DNR)
"WebView" is an online, interactive mapping application maintained by the Wisconsin Dept. of Natural Resources. It provides access to a variety of GIS datasets available at the DNR.

WISConsin Land Information Clearinghouse (WISCLINC)
WISCLINC is a gateway to geospatial data and metadata, related land and reference information, and the Wisconsin agencies which produce or maintain these items.

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LAKE ERIE
Bathymetry of Lake Erie and Lake Saint Clair
U.S. National Geophysical Data Center
As part of NOAA's Great Lakes Data Rescue Project, this site features images of lake depth and lakefloor topography.

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LAKE HURON
Bathymetry of Lake Huron
U.S. National Geophysical Data Center
As part of NOAA's Great Lakes Data Rescue Project, this site features images of lake depth and lakefloor topography.

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LAKE MICHIGAN
Bathymetry of Lake Michigan
U.S. National Geophysical Data Center
As part of NOAA's Great Lakes Data Rescue Project, this ite features images of lake depth and lakefloor topography.

Lake Rim GIS
Center for Geospatial Data Analysis at the Indiana Geological Survey (IGS)
The Coastal Coordination Program, Indiana Department of Environmental Management, and Indiana Geological Survey collaborated to develop the Lake Michigan Lake Rim Geographic Information System (GIS). One of the goals for the Lake Rim GIS is to facilitate public access to and analysis of environmental data for Indiana's coastal region.

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LAKE ONTARIO
Bathymetry of Lake Ontario
U.S. National Geophysical Data Center
As part of NOAA's Great Lakes Data Rescue Project, this ite features images of lake depth and lakefloor topography. (Now available: Full color poster.)

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LAKE SUPERIOR
Lake Superior Decision Support Project
The Lake Superior Decision Support Project is an effort to develop GIS-based decision support applications focused on the Lake Superior Basin. The site maintains several data layers within a 50 kilometer buffer of Lake Superior.

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Updated: November 24, 2014
Maintained by: Stuart Eddy, seddy@glc.org
Selected Photos: Copyright ©John and Ann Mahan
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