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You searched for: Genre Geospatial data Remove constraint Genre: Geospatial data 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 penn-state

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.
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Active Railroads: Pennsylvania penn-state

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.

16.

Agriculture Census: Indiana purdue

1997. United States Geological Survey and Bernardin-Lochmueller & Associates. USGS National Atlas metadata states "This data set portrays the National Agricultural Statistics Service, U.S. Department of Agriculture's 1997 Ce...

18.
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Airports: Centre County, Pennsylvania penn-state

1995. Centre County Government. Point Feature Class - It was originally captured as part of the 1995 Aerial Imagery project completed by Kimball.

20.
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Alleys: Washington, D.C., 1999 maryland

1999. City of Washington, DC. Alley centerlines captured in 1999. Contract NCPC 93-02. This document describes the planimetric map production for the 350 tiles located in Washin...