Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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61.
Aeromagnetic map of Minnesota, southwestern region, Plate 2

Aeromagnetic map of Minnesota, southwestern region, Plate 2

1989. Chandler, Val W. Total magnetic intensity anomaly, contour, scale 1:250,000. Interpretation of magnetic data collected from airborne surveys, the map contours (line...

62.
Aeromagnetic map of Minnesota, St Louis county, Plate 1

Aeromagnetic map of Minnesota, St Louis county, Plate 1

1983. Chandler, Val W. Total magnetic intensity anomaly (relative to the earth's magnetic field), color coded, scale 1:250,000. Interpretation of magnetic data collected...

63.
Aeromagnetic map of Minnesota, St Louis county, Plate 2

Aeromagnetic map of Minnesota, St Louis county, Plate 2

1983. Chandler, Val W. Total magnetic intensity anomaly, contour, scale 1:250,000. Interpretation of magnetic data collected from airborne surveys, the map contours (line...

64.
Aeromagnetic map of Minnesota, west-central region, Plate 1

Aeromagnetic map of Minnesota, west-central region, Plate 1

1987. Chandler, Val W. Total magnetic intensity anomaly (relative to the earth's magnetic field), color coded, scale 1:250,000. Interpretation of magnetic data collected...

65.
Aeromagnetic map of Minnesota, west-central region, Plate 2

Aeromagnetic map of Minnesota, west-central region, Plate 2

1987. Chandler, Val W. Total magnetic intensity anomaly, contour, scale 1:250,000. Interpretation of magnetic data collected from airborne surveys, the map contours (line...

66.
Aggregate resources inventory, Twin Cities Metropolitan Area, Minnesota, IC-20, Plate 1

Aggregate resources inventory, Twin Cities Metropolitan Area, Minnesota, IC-20, Plate 1

1984. Meyer, Gary N. and Jirsa, Mark A. Sand and gravel aggregate resources, geologic map units, seven county metropolitan area, Minnesota, scale 1:250,000.

67.
Aggregate resources inventory, Twin Cities Metropolitan Area, Minnesota, IC-20, Plate 2

Aggregate resources inventory, Twin Cities Metropolitan Area, Minnesota, IC-20, Plate 2

1984. Meyer, Gary N. and Jirsa, Mark A. Bedrock (crushed rock) aggregate resources, geologic map units, seven county metropolitan area, Minnesota, scale 1:250,000.

68.
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Agricultural security areas: Pennsylvania

1996. Penn State ORSER/ERRI. Agricultural security areas from LLRWS data.

69.
Agriculture Census: Indiana

Agriculture Census: Indiana

1997. United States Geological Survey and Bernardin-Lochmueller & Associates. USGS National Atlas metadata states "This data set portrays the National Agricultural Statistics Service, U.S. Department of Agriculture's 1997 Ce...

70.
Airdevronsix Icefalls: Antarctica

Airdevronsix Icefalls: Antarctica

1987. Jean-Claude M. Thomas. Projection: Lambert Conformal Conic Projection - Standard Parallels -76°40' and -79°20'; Series: USGS Satellite Image Maps.

71.
Vector Created with Sketch.

Airports: Centre County, Pennsylvania

1995. Point Feature Class - It was originally captured as part of the 1995 Aerial Imagery project completed by Kimball.

72.
Alexandra Mountains: Antarctica

Alexandra Mountains: Antarctica

1969. Projection: Lambert Conformal Conic Projection: Standard Parallels -76°40' and -79°20'; Series: USGS 1:250,000 Topographic Reconnaissance Series.

73.
Alexandra Mountains: Antarctica

Alexandra Mountains: Antarctica

1977. Wade; Cathey; Oldham. Projection: Lambert Conformal Conic Projection: Standard Parallels -76°40' and -79°20'; Series: USGS 1:250,000 Geologic Reconnaissance Series.

74.
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Alleys: Washington, D.C., 1999

1999. Alley centerlines captured in 1999. Contract NCPC 93-02. This document describes the planimetric map production for the 350 tiles located in Washin...

75.
Vector Created with Sketch.

Ambient and fixed station network groundwater monitoring point data (1985 - 1998): Pennsylvania

1999. Pennsylvania Department of Environmental Protection. This coverage represents the point locations and data for 1,106 groundwater quality monitoring points sampled under the PA DEP Fixed Station Networ...

76.
Antarctic Exploration and Claims: As of 1 February 1956: Antarctica

Antarctic Exploration and Claims: As of 1 February 1956: Antarctica

1956. Downloaded from CIA Flickr page: https://www.flickr.com/photos/ciagov/albums/72157674885572481/with/30252922504/; Series: CIA Declassified Maps.

77.
Vector Created with Sketch.

Archived Land Use Land Cover 1973: Maryland

1973. This is a MD iMAP hosted service. Find more information on http://imap.maryland.gov. This layer contains land use land cover information for the ye...

78.
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Archived Submerged Aquatic Vegetation - SAV 1984: Maryland

1984. This is a MD iMAP hosted service. Find more information on http://imap.maryland.gov. The Chesapeake Bay SAV Coverage was mapped from 1:24,000 black...

79.
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Archived Submerged Aquatic Vegetation - SAV 1985: Maryland

1985. This is a MD iMAP hosted service. Find more information on http://imap.maryland.gov. The Chesapeake Bay SAV was mapped from 1:24,000 black and whit...

80.
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Archived Submerged Aquatic Vegetation - SAV 1986: Maryland

1986. This is a MD iMAP hosted service. Find more information on http://imap.maryland.gov. The Chesapeake Bay SAV was mapped from 1:24,000 black and whit...