Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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101.
Raster

Chesapeake Bay Watershed Land Cover Data Series 1992

1992. 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...

102.
Raster

Chesapeake Bay Watershed Land Cover Data Series 2001

2001. 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...

103.
Raster

Chesapeake Bay Watershed Land Cover Data Series 2006

2006. 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...

104.
CIR Aerial Photography Counties: Iowa, 1980s

CIR Aerial Photography Counties: Iowa, 1980s

1980. Iowa Department of Natural Resources. 1980s Color-Infra-Red Aerial Photography of Iowa Each zip file contains a County-wide dataset.

105.
Vector Created with Sketch.

CIR Aerial Photography Dates: Iowa, 1980s

1980. Iowa Department of Natural Resources. This data has centroids and dates of individual images used.

106.
Raster

CIR Orthoimages - (State Plane): Lancaster County, Pennsylvania

2012. Color InfraRed (CIR) Orthoimages State Plane for Lancaster County, Pennsylvania 2012.

107.
Raster

CIR Orthoimages - (UTM): Lancaster County, Pennsylvania

2012. Lancaster County. Color InfraRed (CIR) Orthoimages State Plane for Lancaster County, Pennsylvania 2012.

108.
Raster

CIR Orthoimages: Lancaster County, Pennsylvania

2012. Lancaster County. Color InfraRed (CIR) Orthoimages State Plane for Lancaster County, Pennsylvania 2012.

109.
Polygon

City Boundary: Ann Arbor, Michigan, 2015

2015. Scott Harrod and City of Ann Arbor. Polygons defining the boundary of the city of Ann Arbor.

110.
Polygon

City Owned Parcels: Ann Arbor, Michigan, 2015

2015. City of Ann Arbor - Community Services and City of Ann Arbor. Polygon parcels of land owned by the City of Ann Arbor near or in the City Boundary.

111.
Color Infra Red Aerial Photography Web Service: Iowa, 2007-2010

Color Infra Red Aerial Photography Web Service: Iowa, 2007-2010

2007-2010. Iowa Department of Natural Resources. All 3 photo periods are included: 2007, 2009, 2010.

112.
Composite Image Service WMS: Minnesota

Composite Image Service WMS: Minnesota

2016. Minnesota Geospatial Information Office. The goal of the Composite Image Service is to provide a single layer image service that automatically switches to an appropriate set of air photos ...

113.
Raster

Conservation Resources: Pennsylvania

2006. Natural Lands Trust with input data from PA DEP. This raster dataset is a compilation of three groups of data including Aquatic Resources, Terrestrial Resources, and Rarity. Several data sets were...

114.
Raster

Contiguous Grasslands: Pennsylvania

2006. Natural Lands Trust with input data from PA DEP. This raster dataset has been created using 'Pennsylvania Land Cover dated 1992' developed by the EROS Data Center for EPA Federal Region III (see m...

115.
Raster

Contiguous Scrub Transitional: Pennsylvania

2006. Natural Lands Trust with input data from PA DEP. This raster dataset has been created using 'Pennsylvania Land Cover dated 1992' developed by the EROS Data Center for EPA Federal Region III (see m...

116.
Vector Created with Sketch.

Contours: Allegheny County, Pennsylvania

2006. Allegheny County Division of Computer Services Geographic Information Systems Group. Contour data was created as a result of a county flyover in the spring of 2004. Contours were created from a DTM Feature Dataset, upgraded by Baker...

117.
Raster

County-wide Mosaics of 7.5 Minute USGS Topographic Maps: Iowa

2018. Iowa Department of Natural Resources. Topographic Maps Each zip file contains a MrSid compressed image of the topographic quads of a certain Iowa county.

118.
Mixed

Cropland Data Layer: Minnesota, 2006

2006. National Agricultural Statistics Service (NASS), United States Department of Agriculture (USDA). The United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS) Cropland Data Layer (CDL) is a raster, geo-refe...

119.
Mixed

Cropland Data Layer: Minnesota, 2007

2007. National Agricultural Statistics Service (NASS), United States Department of Agriculture (USDA). The United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS) Cropland Data Layer (CDL) is a raster, geo-refe...

120.
Mixed

Cropland Data Layer: Minnesota, 2008

2008. National Agricultural Statistics Service (NASS), United States Department of Agriculture (USDA). The United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS) Cropland Data Layer (CDL) is a raster, geo-refe...