Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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1.
Raster

1:100,000 Digital Raster Graphics for Delaware

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

2.
Raster

1:100,000 Digital Raster Graphics for Maryland

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

3.
Raster

1:100,000 Digital Raster Graphics for Virginia

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

4.
Raster

1:100,000 Digital Raster Graphics for West Virginia

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

5.
Raster

1:24,000 - 7.5 minute digital elevation models (DEM) for the District of Columbia (30 meter)

2000. U.S. Geological Survey. Digital Elevation Model (DEM) is the terminology adopted by the USGS to describe terrain elevation data sets in a digital raster form. The standard...

6.
Raster

1:24,000 - 7.5 minute digital elevation models (DEM) for Virginia (30 meter)

2000. U.S. Geological Survey. Digital Elevation Model (DEM) is the terminology adopted by the USGS to describe terrain elevation data sets in a digital raster form. The standard...

7.
Raster

1:24,000 - 7.5 minute Digital Raster Graphics for Maryland

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

8.
Raster

1:24,000 - 7.5 minute Digital Raster Graphics for New Jersey

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

9.
Raster

1:24,000 - 7.5 minute Digital Raster Graphics for the District of Columbia

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

10.
Raster

1:24,000 - 7.5 minute Digital Raster Graphics for West Virginia

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

11.
Raster

1:24,000 -7.5 minute digital elevation models (DEM) for West Virginia (30 meter)

2000. U.S. Geological Survey. Digital Elevation Model (DEM) is the terminology adopted by the USGS to describe terrain elevation data sets in a digital raster form. The standard...

12.
Raster

1:250,000 Digital Raster Graphics for Delaware

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

13.
Raster

1:250,000 Digital Raster Graphics for Maryland

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

14.
Raster

1:250,000 Digital Raster Graphics for Virginia

2000. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

15.
Raster

1:250,000 Digital Raster Graphics for West Virginia

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

16.
1:250k Digital Raster Graphic - Collars Removed: Minnesota

1:250k Digital Raster Graphic - Collars Removed: Minnesota

1998. U.S. Geological Survey and Minnesota DNR. A digital raster graphic (DRG) is a scanned image of an U.S. Geological Survey (USGS) standard series topographic map, including all map collar inf...

17.
Aerial Imagery: Hennepin County, Minnesota, 1940

Aerial Imagery: Hennepin County, Minnesota, 1940

1940. Hennepin County Geographic Information Systems. Rectified black and white aerial imagery of portions of Hennepin County captured during the summer of 1940.

18.
Aerial Imagery: Hennepin County, Minnesota, 1953

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.

19.
Aerial Imagery: Hennepin County, Minnesota, 1957

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.

20.
Aerial Imagery: Hennepin County, Minnesota, 1964

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.

21.
Aerial Imagery: Hennepin County, Minnesota, 1969

Aerial Imagery: Hennepin County, Minnesota, 1969

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

22.
Aerial Imagery: Hennepin County, Minnesota, 1988

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.

23.
Aerial Imagery: Hennepin County, Minnesota, 1989

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.

24.
Aerial Imagery: Hennepin County, Minnesota, 2000

Aerial Imagery: Hennepin County, Minnesota, 2000

2000. Hennepin County Geographic Information Systems. True color aerial orthophotography of Hennepin County captured during the spring of 2000.

25.
Aerial Imagery: Hennepin County, Minnesota, 2002

Aerial Imagery: Hennepin County, Minnesota, 2002

2002. Hennepin County Geographic Information Systems. True color aerial orthophotography of Hennepin County captured during the spring of 2002.

26.
Aerial Imagery: Hennepin County, Minnesota, 2004

Aerial Imagery: Hennepin County, Minnesota, 2004

2004. Hennepin County Geographic Information Systems. True color aerial orthophotography of Hennepin County captured during the spring of 2004.

27.
Aerial Imagery: Hennepin County, Minnesota, 2005

Aerial Imagery: Hennepin County, Minnesota, 2005

2005. Hennepin County Geographic Information Systems. True color aerial orthophotography of Hennepin County captured in 2005 by the USDA Farm Service Agency.

28.
Aerial Imagery: Hennepin County, Minnesota, 2006

Aerial Imagery: Hennepin County, Minnesota, 2006

2006. Hennepin County Geographic Information Systems. True color aerial orthophotography of Hennepin County captured during the spring of 2006.

29.
Aerial Imagery: Hennepin County, Minnesota, 2009

Aerial Imagery: Hennepin County, Minnesota, 2009

2009. Hennepin County Geographic Information Systems. True color aerial orthophotography of Hennepin County captured during the spring of 2009.

30.
Aerial Imagery: Hennepin County, Minnesota, 2012

Aerial Imagery: Hennepin County, Minnesota, 2012

2012. Hennepin County Geographic Information Systems. True color aerial orthophotography of Hennepin County captured during the spring of 2012.

31.
Aerial Imagery: Hennepin County, Minnesota, 2015

Aerial Imagery: Hennepin County, Minnesota, 2015

2015. Hennepin County Geographic Information Systems. True color aerial orthophotography of Hennepin County captured during the spring of 2015.

32.
Aerial Imagery: Sherburne County, Minnesota, 2014

Aerial Imagery: Sherburne County, Minnesota, 2014

2014. Sherburne County, Minnesota. Aerial imagery obtained in the spring of 2014.

33.
Aerial Imagery: Sherburne County, Minnesota, 2015

Aerial Imagery: Sherburne County, Minnesota, 2015

2015. Sherburne County, Minnesota. Digital Color orthophotography covering Sherburne County, Minnesota.

34.
Vector Created with Sketch.

Aerial Imagery: Washington County, Minnesota, 1945

Washington County Public Works. georeferenced 1945 aerials.

35.
Aerial Photo Counties: Iowa, 2016

Aerial Photo Counties: Iowa, 2016

2016. These county-wide datasets have been up-sampled to a one-meter-resolution raster, in jp2 format.

36.
Raster
37.
Raster

Aerial Photography 1996: Philadephia, Pennsylvania

1996. Philadelphia aerial photography.

38.
Raster
39.
Raster

Aerial Photography 2000: Philadephia, Pennsylvania

2000. Philadelphia aerial photography.

40.
Raster
41.
Raster

Aerial Photography 2004: Philadephia, Pennsylvania

2004. Philadelphia aerial photography.

42.
Raster
43.
Raster

Aerial Photography 2005: Philadephia, Pennsylvania

2005. Philadelphia aerial photography.

44.
Raster
45.
Raster

Aerial Photography 2008: Philadephia, Pennsylvania

2008. Philadelphia aerial photography.

46.
Raster
47.
Raster

Aerial Photography 2009: Philadephia, Pennsylvania

2009. Philadelphia aerial photography.

48.
Raster
49.
Raster

Aerial Photography 2010: Philadephia, Pennsylvania

2010. Philadelphia aerial photography.

50.
51.
Raster

Aerial Photography 2011 - Leaf On: Philadephia, Pennsylvania

2011. Philadelphia aerial photography - Leaf On.

52.
Raster
53.
Raster

Aerial Photography 2011: Philadephia, Pennsylvania

2011. Philadelphia aerial photography.

54.
Raster
55.
Raster

Aerial Photography 2012: Philadephia, Pennsylvania

2012. Philadelphia aerial photography.

56.
Raster
57.
Raster

Aerial Photography 2014: Philadephia, Pennsylvania

2014. Philadelphia aerial photography.

58.
Raster
59.
Raster

Aerial Photography 2015: Philadephia, Pennsylvania

2015. Philadelphia aerial photography.

60.
Raster
61.
Raster

Aerial Photography 2016 1m: Philadephia, Pennsylvania

2016. Philadelphia aerial photography.

62.
Raster

Aerial Photography 2016 3in - tile Index: Philadephia, Pennsylvania

2016. Philadelphia aerial photography 3 inch pixels tile index. The dataset consists of tiled orthogonal imagery produced from nadir images captured by P...

63.
Raster

Aerial Photography 2016 3in: Philadephia, Pennsylvania

2016. Philadelphia aerial photography.

64.
Raster

Aerial Photography 2017 - Mosaics: Philadephia, Pennsylvania

2017. Philadelphia aerial photography city wide mosaic. The dataset consists of tiled orthogonal imagery produced from nadir images captured by Pictometr...

65.
Raster

Aerial Photography 2017 1m - tile index: Philadephia, Pennsylvania

2017. Philadelphia aerial photography 1 meter pixels tile index. The dataset consists of tiled orthogonal imagery produced from nadir images captured by ...

66.
Raster

Aerial Photography 2017 1m: Philadephia, Pennsylvania

2017. Philadelphia aerial photography 1 meter pixels. The dataset consists of tiled orthogonal imagery produced from nadir images captured by Pictometry ...

67.
Raster

Aerial Photography 2017 3in - tile index: Philadephia, Pennsylvania

2017. Philadelphia aerial photography 3 inch pixels tile index. The dataset consists of tiled orthogonal imagery produced from nadir images captured by P...

68.
Raster

Aerial Photography 2017 3in: Philadephia, Pennsylvania

2017. Philadelphia aerial photography 3 inch pixels. The dataset consists of tiled orthogonal imagery produced from nadir images captured by Pictometry I...

69.
Aerial Photography: Carver County, Minnesota, 1991

Aerial Photography: Carver County, Minnesota, 1991

1991. CarverGIS. Carver County 2011 Imagery.

70.
Aerial Photography: Carver County, Minnesota, 2005

Aerial Photography: Carver County, Minnesota, 2005

2005. CarverGIS. Carver County 2005 Aerometric Imagery.

71.
Aerial Photography: Carver County, Minnesota, 2008

Aerial Photography: Carver County, Minnesota, 2008

2008. CarverGIS. Carver County 2008 Pictometry Imagery.

72.
Aerial Photography: Carver County, Minnesota, 2011

Aerial Photography: Carver County, Minnesota, 2011

2011. CarverGIS. Carver County 2011 Pictometry Imagery.

73.
Aerial Photography: Carver County, Minnesota, 2013

Aerial Photography: Carver County, Minnesota, 2013

2013. CarverGIS. Carver County 2013 Aerometric Imagery.

74.
Aerial Photography: Carver County, Minnesota, 2017

Aerial Photography: Carver County, Minnesota, 2017

2017. CarverGIS. Carver County 2017 Pictometry Imagery.

75.
Raster

Aerial Photography Counties: Iowa, 1930s

1930. Iowa Department of Natural Resources. 1930s Aerial Photography of Iowa County dataset in a zipped file.

76.
Aerial Photography Counties: Iowa, 1950s

Aerial Photography Counties: Iowa, 1950s

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

77.
Aerial Photography Counties: Iowa, 1960s

Aerial Photography Counties: Iowa, 1960s

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

78.
Aerial Photography Counties: Iowa, 1970s

Aerial Photography Counties: Iowa, 1970s

1970. Iowa Department of Natural Resources. 1970s Aerial Photography of Iowa Each zip file contains a county raster dataset.

79.
Aerial Photography: Dakota County, Minnesota, 1927-2016

Aerial Photography: Dakota County, Minnesota, 1927-2016

1927-2016. Dakota County. Partial and County wide ortho photography at various pixel resolutions from a variety of years from 1927 - 2016. <a href="Summary.htm">Horizontal A...

80.
Aerial Photography: Dakota County, Minnesota, 2013

Aerial Photography: Dakota County, Minnesota, 2013

2013. Dakota County. County wide ortho photography at 6-inch pixel resolution. The photography was exposed on 4/29/13, 5/12/2013, 5/14/2013, 5/16/13 and 5/23/13. Rectif...

81.
Aerial Photography: Dakota County, Minnesota, 2014

Aerial Photography: Dakota County, Minnesota, 2014

2014. Dakota County. Low level (6-inch) aerial photography for Dakota County flown in Spring 2014.

82.
Aerial Photography: Dakota County, Minnesota, 2015

Aerial Photography: Dakota County, Minnesota, 2015

2015. Dakota County. Low level (6-inch) aerial photography for Dakota County flown in Spring 2015.

83.
Aerial Photography: Dakota County, Minnesota, 2016

Aerial Photography: Dakota County, Minnesota, 2016

2016. Dakota County. Low level (6-inch) aerial photography for Dakota County flown in Spring 2016.

84.
Aerial Photography Dates File: Iowa, 1930s

Aerial Photography Dates File: Iowa, 1930s

1930. Iowa Department of Natural Resources. This file contains a shapefile of the centroids of individual scanned photos, and the associated date.

85.
Vector Created with Sketch.

Aerial Photography Dates: Iowa, 1950s

1950. Iowa Department of Natural Resources. Zipped file Contains a dateset of the centroids, with dates, of the individual images used.

86.
Vector Created with Sketch.

Aerial Photography Dates: Iowa, 1960s

1960. Iowa Department of Natural Resources. This dataset is centroids with dates of the individual images used.

87.
Vector Created with Sketch.

Aerial Photography Dates: Iowa, 1970s

1970. Iowa Department of Natural Resources. This shapefile has centroids with dates of all images used in this dataset.

88.
Aerial Photography, Fall: Dakota County, Minnesota, 2017

Aerial Photography, Fall: Dakota County, Minnesota, 2017

2017. Dakota County. County wide ortho photography at 6-inch pixel resolution in County Coordinates. The photography was exposed on 11/08/17, 11/09/2017, 11/18/2017 and...

89.
Aerial Photography, Leaf-on: Dakota County, Minnesota, 2016

Aerial Photography, Leaf-on: Dakota County, Minnesota, 2016

2016. Dakota County. Ayres Associates provided Dakota County with low level (6-inch) digital, color orthoimagery services in 2016. The aerial imagery was collected on A...

90.
Raster

Aerial Photography: Mifflin County, Pennsylvania

1995. Mifflin County - Laura H. McLaughlin. Aerial Orthophotograph taken on April 5, 1995.

91.
Andreas Atlas Counties: Iowa, 1875

Andreas Atlas Counties: Iowa, 1875

1875. Iowa Department of Natural Resources. 1875 Andreas Atlas of Iowa Each zip file contains a county raster dataset.

92.
Raster

Aquatic Resources Combined - Central Appalachian Forest Ecoregion: Pennsylvania

2010. Natural Lands Trust. This raster dataset is a compilation of several data sets that have been combined to create an overall aquatic resources conservation value raster ...

93.
Raster

Aquatic Resources Combined - High Allegheny Plateau Ecoregion: Pennsylvania

2010. Natural Lands Trust. This raster dataset is a compilation of several data sets that have been combined to create an overall aquatic resources conservation value raster ...

94.
Vector Created with Sketch.

Base Flood Elevation: Carver County, Minnesota

CarverGIS. 2010 FEMA DFIRM base flood elevations.

95.
Mixed

Basemap Service: Minnesota

2014. Minnesota Department of Agriculture. This map service is intended as a suitable general, theme-agnostic basemap that can be overlain on top of aerial photography or other opaque layers...

96.
Raster

Bird Habitat - Central Appalachian Forest Ecoregion: Pennsylvania

2010. Natural Lands Trust. This raster dataset has been created using the original data 'Pennsylvania conservation gap avian habitat models' as originated by the Environmenta...

97.
Raster

Bird Habitat - High Allegheny Plateau Ecoregion: Pennsylvania

2010. Natural Lands Trust. This raster dataset has been created using the original data 'Pennsylvania conservation gap avian habitat models' as originated by the Environmenta...

98.
Vector Created with Sketch.

Blocks: Allegheny County, Pennsylvania

2002. Allegheny County Division of Computer Services Geographic Information Systems Group. Derived from original MAPINDX: Map Index Sheets from Block and Lot Grid of Property Assessment and based on aerial photography, showing 1983 datum ...

99.
Polygon

Buildings Sauk County, Wisconsin, YE2016

2016. Sauk County Land Information/GIS Department. This polygon data layer represents buildings in Sauk County, Wisconsin at year-end 2016. It is a feature class within the geodatabase, Sauk_Buildin...

100.
Raster

Chesapeake Bay Watershed Land Cover Data Series 1984

1984. U.S. Geological Survey. To better understand how the land is changing and to relate those changes to water quality trends, the USGS funded the production of a Chesapeake B...