Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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61.
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.

62.
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Agricultural security areas: Pennsylvania

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

63.
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...

64.
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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.

65.
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Alexandra Mountains: Antarctica

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

66.
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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.

67.
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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...

68.
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Annual Average Daily Traffic (AADT) Turning Traffic 1999: Iowa

1999. Iowa Department of Transportation. Iowa turning traffic data (AADT) for intersections on the primary, secondary and municipal roadway systems for 1999. The state is divided into 4 qu...

69.
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Annual Average Daily Traffic (AADT) Turning Traffic: Iowa, 1998

1998. Iowa Department of Transportation. Iowa turning traffic data (AADT) for intersections on the primary, secondary and municipal roadway systems for 1998. The state is divided into 4 qu...

70.
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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.

71.
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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...

72.
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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...

73.
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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...

74.
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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...

75.
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Archived Submerged Aquatic Vegetation - SAV 1987: Maryland

1987. 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...

76.
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Archived Submerged Aquatic Vegetation - SAV 1989: Maryland

1989. 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...

77.
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Archived Submerged Aquatic Vegetation - SAV 1990: Maryland

1990. 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...

78.
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Archived Submerged Aquatic Vegetation - SAV 1991: Maryland

1991. 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...

79.
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Archived Submerged Aquatic Vegetation - SAV 1992: Maryland

1992. 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 1993: Maryland

1993. 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...