Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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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...