Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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You searched for: Subject Boundaries Remove constraint Subject: Boundaries Time Period 1950-1999 Remove constraint Time Period: 1950-1999
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1.
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104 State Water Plan Watersheds: Pennsylvania

1998. Environmental Resources Research Institute. Digitized boundaries of 104 major watersheds defined in the Pennsylvania state water plan. The State Water Plan, originally developed in the 1970s,...

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Block Groups: Michigan, 1990

1990. 1990 Block Groups from the Michigan Geographic Framework (MGF) base map. Block groups (BG s) are combinations of census blocks within a census trac...

3.
BWCA boundary based on the 1978 Legislation: Minnesota

BWCA boundary based on the 1978 Legislation: Minnesota

1978. Minnesota Department of Natural Resources (DNR) - Division of Lands & Minerals. This boundary is based on the legal description of the Boundary Waters Canoe Area Wilderness, in accordance with Public Law 95-495 dated October 21...

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Census Tracts by Population - 1990: Washington, D.C.

1990. District of Columbia GIS Program. Census Year 1990 Tract Polygons. This dataset contains polygon features, created as part of the DC Geographic Information System (DC GIS) for the D...

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Census Tracts: Michigan, 1990

1990. 1990 Census Tracts from the Michigan Geographic Framework (MGF) base map. Census tracts are small areas created for statistical purposes that usual...

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Census Tracts: Washington, D.C., 1950

1950. District of Columbia GIS Program. Census Year 1950 Census Tracts. The dataset contains polygons representing CY 1950 census tractsC. Geographic Information System (DC GIS) for the D...

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Chesapeake Bay region state boundaries

1996. Penn State ORSER/ERRI. Boundaries for the states in the Chesapeake Bay region.

8.
Congressional District Boundaries: Minnesota, 1994

Congressional District Boundaries: Minnesota, 1994

1994. Minnesota Legislative Coordinating Commission - Geographic Information Services Office (LCC- GIS). This is a polygon data set of historical 1994 Congressional District Boundaries. It displays district number, member, area, population and well as ...

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Congressional Districts: Minnesota, 1994

1994. Legislative Coordinating Commission. This is a polygon data set for the 1994 Congressional Districts. This database of Congressional District Boundares was developed from U.S. Census ...

10.
Counties and Minor Civil Divisions (Cities and Townships), 1990: Metro Twin Cities, Minnesota

Counties and Minor Civil Divisions (Cities and Townships), 1990: Metro Twin Cities, Minnesota

1990. Metropolitan Council. This is a polygon layer of county and minor civil divisions (cities and townships) in the 7-county Twin Cities metropolitan area as of 1990. NOTE...

11.
County Boundaries: Illinois, 2003

County Boundaries: Illinois, 2003

1968-1979. Illinois State Geological Survey. This data set contains Illinois county boundaries in line and polygon formats. The polygon attribute data include county name and number (FIPS) des...

12.
House District Boundaries: Minnesota, 1994

House District Boundaries: Minnesota, 1994

1994. Minnesota Legislative Coordinating Commission - Geographic Information Services Office (LCC- GIS). This is a polygon data set of the 1994 Minnesota House Legislative District Boundaries. It displays district numbers. Includes house districts asso...

13.
Index of USGS 100,000 Scale Quadrangles: Indiana

Index of USGS 100,000 Scale Quadrangles: Indiana

1999. United States Geological Survey. This dataset shows the grid index of USGS 100K quadrangles. Each polygon is attributed with the official USGS quadrangle name and index number.

14.
Index of USGS 250,000 Scale Quadrangles: Indiana

Index of USGS 250,000 Scale Quadrangles: Indiana

1999. United States Geological Survey. This dataset shows the grid index of USGS 250K quadrangles. Each polygon is attributed with the official USGS quadrangle name and index number.

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Landmarks in Pennsylvania

1996. Environmental Resources Research Institute. National Park Service information used to establish landmark boundaries on 1:24,000 USGS topographic maps.

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National forests in Pennsylvania

1996. Environmental Resources Research Institute. Boundary information from the office of the Allegheny National Forest, taken from 1:24,000 USGS topographic maps.

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National parks in Pennsylvania

1996. Environmental Resources Research Institute. National Park Service list and boundaries from 1:24,000 USGS topographic maps.

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National Wildlife Preserves in Pennsylvania

1996. Environmental Resources Research Institute. Boundaries of National Wildlife Preserves in Pennsylvania. Boundaries were provided by the United States Department of the Interior, National Fish ...

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PA Explorer: Terrabyte Image: Pennsylvania

1998. Wayne Myers. The Terrabyte images are extractives from Landsat Thematic Mapper images through the SpectraPlex process. This process does not permit the full res...

20.
PLSS Indian Treaty Boundary Lines: Illinois, 2003

PLSS Indian Treaty Boundary Lines: Illinois, 2003

1968-1979. Illinois State Geological Survey. This data set contains Indian Treaty boundary lines from the Illinois Public Land Survey System. The nominal scale is 1:62,500. As of 2003, the dat...