Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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421.
Raster

Imagery 2010: Allegheny County, Pennsylvania

2010. Allegheny County Division of Computer Services Geographic Information Systems Group. Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for camera lens di...

422.
Raster

Imagery 2013 - Tile Index: Allegheny County, Pennsylvania

2013. Allegheny County Division of Computer Services Geographic Information Systems Group. Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for camera lens di...

423.
Raster

Imagery 2013: Allegheny County, Pennsylvania

2013. Allegheny County Division of Computer Services Geographic Information Systems Group. Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for camera lens di...

424.
Raster

Imagery 2015 - Tile Index: Allegheny County, Pennsylvania

2015. Tile Index - Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for c...

425.
Raster

Imagery 2015: Allegheny County, Pennsylvania

2015. Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for camera lens di...

426.
Raster

Imagery 2017 - 3 inch pixels: Allegheny County, Pennsylvania

2017. Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for camera lens di...

427.
Raster

Imagery 2017 - 9 inch pixels: Allegheny County, Pennsylvania

2017. Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for camera lens di...

428.
Raster

Imagery 2017 3 inch - Tile Index: Allegheny County, Pennsylvania

2017. Tile Index - Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for c...

429.
Raster

Imagery 2017 9 inch - Tile Index: Allegheny County, Pennsylvania

2017. Tile Index - Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for c...

430.
Vector Created with Sketch.

Imagery 2017: Penn State Campus: Pennsylvania

2017. Penn State Campus Imagery (caputured in 2017) includes Agricultural Research Center at Rock Springs.

431.
Vector Created with Sketch.

Imagery Acquisition Flight Information - Control Points: Maryland

2016. ArcGIS Online for Maryland. This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.Ground control points are necessary for achieving the req...

432.
Raster

Impervious Change - Central Appalachian Forest Ecoregion: Pennsylvania

2010. This raster dataset has been created by calculating the average of impervious surface for the small watersheds for years 1985 and 2000. The differe...

433.
Raster

Impervious Change - High Allegheny Plateau Ecoregion: Pennsylvania

2010. This raster dataset has been created by calculating the average of impervious surface for the small watersheds for years 1985 and 2000. The differe...

434.
Raster

Impervious Cover - Central Appalachian Forest Ecoregion: Pennsylvania

2010. This raster dataset has been created using the attribute field "Value" from the "Impervious Surface Area for Southeast Pennsylvania, 2000" data as ...

435.
Raster

Impervious Cover - High Allegheny Plateau Ecoregion: Pennsylvania

2010. This raster dataset has been created using the attribute field "Value" from the "Impervious Surface Area for Southeast Pennsylvania, 2000" data as ...

436.
Raster

Impervious Cover Change 1985-2000: Pennsylvania

2006. This raster dataset has been created by calculating the average of impervious surface for the small watersheds for years 1985 and 2000. The differe...

437.
Raster

Impervious Cover year 1985: Pennsylvania

2006. This raster dataset has been created using the attribute field "Value" from the "Impervious Surface Area for Southeast Pennsylvania, 1985" data as ...

438.
Raster

Impervious Cover year 2000: Pennsylvania

2006. This raster dataset has been created using the attribute field "Value" from the "Impervious Surface Area for Southeast Pennsylvania, 2000" data as ...

439.
Raster

Important Bird Areas - Central Appalachian Forest Ecoregion

2010. This raster dataset has been created using the "Important Bird Areas" as originated by the Pennsylvania Audubon Society. All areas designated as co...

440.
Raster

Important Bird Areas - High Allegheny Plateau Ecoregion

2010. This raster dataset has been created using the "Important Bird Areas" as originated by the Pennsylvania Audubon Society. All areas designated as co...