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You searched for: Resource Type Vector data Remove constraint Resource Type: Vector data Time Period 1950-1999 Remove constraint Time Period: 1950-1999

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1.
Datasets datasets

104 State Water Plan Watersheds: Pennsylvania Datasets datasets pennsylvania-state-university

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,... The Pennsylvania State University.

3.
Datasets datasets

Active Railroads: Pennsylvania Datasets datasets pennsylvania-state-university

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. The Pennsylvania State University.

4.

Address Points: Cook County, Illinois university-of-chicago

1998. Cook_County_GIS. This feature layer contains one point for every address in Cook County.Data is updated and maintained by Cook County GIS.If you plan on downloading...

9.
Datasets datasets

Aerial Imagery Index Points: Prince George's County, Maryland, 1965 Datasets datasets university-of-maryland

1965. The Maryland-National Capital Park & Planning Commission. The Commission has purchased a set of black & white imagery paper prints for all of Prince George's County, Maryland. This GIS point layer is used ... Prince George's County, Maryland.

10.
Datasets datasets

Aerial Imagery Index Points: Prince George's County, Maryland, 1968 Datasets datasets university-of-maryland

1968. The Maryland-National Capital Park & Planning Commission. The Commission has purchased a set of black & white imagery paper prints for all of Prince George's County, Maryland. This GIS point layer is used ... Prince George's County, Maryland.