Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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You searched for: Time Period 1950-1999 Remove constraint Time Period: 1950-1999
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1. 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,...

2. [1970 census enumeration district and census tract map of Monroe County, Indiana].

1970. Title supplied by cataloger.; Blue line print.; Base map: General Highway and transportation map, Monroe County, Indiana / prepared by the Indiana ...

3. 32,000 to vote in 29 precincts here: [Bloomington, Ind.].

1966. From Daily Herald-Telephone, Bloomington, Indiana, November 4, 1966.; Map shows voting precincts inside the City of Bloomington, Indiana, and inclu...

4. 7th congressional district of Indiana, 1972.

1972. Boundaries of 7th Congressional District of Indiana in 1972 drawn on a copy of "Counties and townships" map, p. 10 of Kingsbury, Robert C., An atla...

6. Abandoned railroads of Indiana.

1960. Pen and ink.; Base map: Geological Survey (U.S.). State of Indiana, Scale 1:500,000, Washington, D.C., 1950. Scale approximately 1:2,027,520.

7. Active Railroads: Pennsylvania

1996. Environmental Resources Research Institute. Location of active rail lines in Pennsylvania, digitized from 1:24,000 USGS topographic maps on a stable mylar base.

8. Advisory Neighborhood Commission: Washington, D.C., 1990

1990. District of Columbia GIS Program. Advisory Neighborhood Commission (ANC) polygons. This dataset contains polygons representing ANC boundaries in 1990C. Office of the Chief Technolog...

9. Aerial gamma radiation in Minnesota and adjacent areas of North Dakota and South Dakota, M-83

1996. Lively, R.S. and Morey, G.B. Maps showing general Quaternary age surface geology of Minnesota and distribution of uranium, thorium and potassium-40 in surface sediments, scale ...

10. Aerial Imagery: Hennepin County, Minnesota, 1953

1953. Hennepin County Geographic Information Systems. Rectified black and white aerial imagery of Hennepin County captured during the fall of 1953.

11. Aerial Imagery: Hennepin County, Minnesota, 1957

1957. Hennepin County Geographic Information Systems. Rectified black and white aerial imagery of Hennepin County captured during the spring of 1957.

12. Aerial Imagery: Hennepin County, Minnesota, 1964

1964. Hennepin County Geographic Information Systems. Rectified black and white aerial imagery of Hennepin County captured during the fall of 1964.

13. Aerial Imagery: Hennepin County, Minnesota, 1969

1969. Hennepin County Geographic Information Systems. Rectified black and white aerial imagery of Hennepin County from 1969.

14. Aerial Imagery: Hennepin County, Minnesota, 1988

1988. Hennepin County Geographic Information Systems. Rectified black and white aerial imagery of the City of Minneapolis captured during the spring of 1988.

15. Aerial Imagery: Hennepin County, Minnesota, 1989

1989. Hennepin County Geographic Information Systems. Rectified black and white aerial imagery of western Hennepin County captured during the spring of 1989.

16. Aerial Photography 1996 - Tile Index: Philadephia, Pennsylvania

1996. Philadelphia aerial photography.

17. Aerial Photography 1996: Philadephia, Pennsylvania

1996. Philadelphia aerial photography.

18. Aerial Photography: Carver County, Minnesota, 1991

1991. CarverGIS. Carver County 2011 Imagery.

19. Aerial Photography Counties: Iowa, 1950s

1950. Iowa Department of Natural Resources. 1950s Aerial Photography of Iowa County dataset in a zipped file.

20. Aerial Photography Counties: Iowa, 1960s

1960. Iowa Department of Natural Resources. 1960s Aerial Photography of Iowa County Dataset in a zipped file.