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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ArcGIS REST Services Directory for Lucas County, Ohio

1998-present. ArcGIS REST site referencing layers for parcels, boundaries, transportation, hydrology, utilities, and more. Also contains references to elevation ...

3.
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Block Groups: Michigan, 1990

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

4.
BWCA boundary based on the 1978 legislation: Minnesota

BWCA boundary based on the 1978 legislation: Minnesota

1978. Minnesota Department of Natural Resources (DNR). 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 Block Groups 1990: Philadelphia, Pennsylvania, United States

1990. City of Philadelphia. This layer is not created by the City of Philadelphia but is provided for mapping purposes. For further information about this layer, see the docum...

6.
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Census Tracts 1990: Philadelphia, Pennsylvania, United States

1990. City of Philadelphia. This layer is not created by the City of Philadelphia but is provided for mapping purposes. For further information about this layer, see the docum...

7.
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Census Tracts By Population - 1990: Washington, D.C.

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

8.
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Census Tracts: Michigan, 1990

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

9.
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Census Tracts: Washington, D.C., 1950

1950. City of Washington, DC. Census Year 1950 Census Tracts. The dataset contains polygons representing CY 1950 census tracts, created as part of the D.C. Geographic Informatio...

10.
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Chesapeake Bay region state boundaries

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

11.
Congressional District Boundaries, 1994: Minnesota

Congressional District Boundaries, 1994: Minnesota

1994. Minnesota Legislative Coordinating Commission. This is a polygon data set of historical 1994 Congressional District Boundaries. It displays district number, member, area, population and well as ...

12.
Polygon

Congressional Districts: Minnesota, 1994

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

13.
Counties and Minor Civil Divisions (Cities and Townships), 1990: Minnesota

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

1990. 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...

14.
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...

15.
County Council Districts, Historic: Howard County, Maryland, 1990

County Council Districts, Historic: Howard County, Maryland, 1990

1990. Historic Howard County Council Districts based on the 1990 Census Data and Howard County Redistricting. This data was replaced by the 2000 Council ...

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Downtown Development Comprehensive Plan: District of Columbia

1984. City of Washington, DC. The DC Comprehensive Plan document (1984) identifies the Downtown Development areas as a key part of the District's Central Employment Area. It is ...

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GIS Downloads for Putnam County, Ohio

1995-present. Putnam County GIS Office. Website containing downloadable shapefiles for parcels, addresses, transportation, boundaries, hydrology, geology, and more. Also contains 1995-201...

18.
Historic County Boundaries and Total Population: United States, 1950

Historic County Boundaries and Total Population: United States, 1950

1950. Minnesota Population Center. This boundary file contains historic county boundaries for which the U.S. Census Bureau tabulated data and was produced by the Minnesota Population...

19.
Historic County Boundaries and Total Population: United States, 1960

Historic County Boundaries and Total Population: United States, 1960

1960. Minnesota Population Center. This boundary file contains historic county boundaries for which the U.S. Census Bureau tabulated data and was produced by the Minnesota Population...

20.
Historic County Boundaries and Total Population: United States, 1970

Historic County Boundaries and Total Population: United States, 1970

1970. Minnesota Population Center. This boundary file contains historic county boundaries for which the U.S. Census Bureau tabulated data and was produced by the Minnesota Population...