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41. Airports of the United States, 2012
2012. Geological Survey (U.S.). This point shapefile includes airports in the United States, Puerto Rico and the U.S. Virgin Islands. The data were derived from an extract of the ... Geological Survey (U.S.).
42. An accurate map of Rhode Island, part of Connecticut and Massachusets [sic] : shewing Admiral Arbuthnot's station in blocking up Admiral Ternay
Lodge, John, -1796. Covers Rhode Island, the eastern half of Connecticut, southeastern Massachusetts as far east as Falmouth and Martha's Vineyard, and eastern Long Is... London : J. Bew, 1780.
43. Anchorages, Northeast United States, 2013
2013. Baldwin Group. This polygon shapefile represents anchorages in the Northeastern United States. The areas described are designated as special anchorage areas for p... Coastal Services Center (U.S.).
44. Anchor's Weigh, Admiral's Hill, Chelsea, MA. master site plan /
The Architectural Team, Inc.,.
45. Anchor's Weigh, Admiral's Hill, Chelsea, MA. master site plan /
The Architectural Team, Inc.,.
46. Aquaculture, Northeast United States, 2014
2013. SeaPlan. This polygon shapefile represents aquaculture regions in the northeastern United States. Aquaculture in the northeast region is a diverse, vibrant ... Northeast Ocean Data.
47. Areas and Facies Types of Metamorphism: Geology of the Conterminous United States, 2005
2005. King, Philip B., Arndt, Raymond E., Schruben, Paul G., Bawiec, Walter J., and Beikman, Helen M. This line shapefile shows the outlines of major calderas and impact structures in the United States. This layer is part of the Geologic Map of the ... Geological Survey (U.S.).
48. Areas of cut & fill at Columbia Point : Columbia Point feasibility study FS - 89 /
Boston Redevelopment Authority, cartographer, issuing body. Boston Redevelopment Authority,.
49. Average rentals per block /
Somerville (Mass.). City Planning Board, cartographer, issuing body. [City Planning Board],.
50. Bailey's Ecoregions and Subregions of the United States, 2004
2004. United States. Forest Service. This polygon shapefile is commonly called Bailey's ecoregions and shows ecosystems of regional extent in the United States, Puerto Rico, and the U.... National Atlas of the United States.