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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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3.75-Minute Quarter Quadrangle Boundary: Pennsylvania

2003. Pennsylvania Spatial Data Access. Index of USGS quarter-quadrangles (3.75 minute) covering Pennsylvania. The polygons are attributed with information pertaining to the USGS/PaGS Dig...

3.
Access Across America: Transit Data, 2014

Access Across America: Transit Data, 2014

2014. Owen, Andrew and Levinson, David M. This data was created as part of a study that examined the accessibility to jobs by transit in 46 of the 50 largest (by population) metropolitan ar...

4.
Access Across America: Walk Data, 2014

Access Across America: Walk Data, 2014

2014. Owen, A., Levinson, D., and Murphy, B. These data were created as part of a study that examined the accessibility to jobs by walking in the 53 largest (by population) metropolitan areas ...

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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.

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Bedrock Geology: Illinois, 2005

2005. Illinois State Geological Survey. This feature dataset shows the distribution and extent of the bedrock geologic units within the State of Illinois, as depicted on the map Bedrock G...

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Bedrock Geology of Illinois - Geologic Units, 2004

1996. Illinois State Geological Survey. This feature class shows the distribution and extent of the bedrock geologic units within the State of Illinois, as depicted on the Geologic Map of...

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Breeding Bird Atlas 2 - Grid: Pennsylvania

2004. This Website provides an interface for PA Breeding Bird Atlas staff and volunteers to find survey blocks, enter their findings and view results. I ...

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Breeding Bird Atlas 2 - Regions: Pennsylvania

2004. This Website provides an interface for PA Breeding Bird Atlas staff and volunteers to find survey blocks, enter their findings and view results. I ...

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Buildings: Penn State Campus: Pennsylvania

2018. Buildings polygons were originally created in 1998 using planimetric mapping. Roof outlines are depicted as if they were on the ground. In 2004 Bui...

19.
Buried Bedrock Surface: Illinois, 2004

Buried Bedrock Surface: Illinois, 2004

1994. Herzog, B.L.. B.J. Stiff, C.A. Chenoweth, K.L. Warner, J.B. Sievering, C. Avery. The Buried Bedrock Surface of Illinois map represents the first revision of the bedrock topography map since the second edition was published by th...

20.
C-04 Geologic atlas of Hennepin County, Minnesota

C-04 Geologic atlas of Hennepin County, Minnesota

1989. Balaban, N.H and Minnesota Geological Survey. 9 pls. Scale 1:100,000 and smaller. Pl. 1, data-base; pl. 2, bedrock geology, pl. 3, surficial geology; pl. 4, bedrock topography and depth to bedr...