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.).
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2014. Nature Conservancy (U.S.). This point shapefile contains site locations from the National Register of Historic Places in Maine, Massachusetts and Rhode Island within 10km of ... Northeast Regional Ocean Council.
2014. SeaPlan. This polygon shapefile represents eelgrass beds in the Northeastern United States. Eelgrass (Zostera marina) beds are critical wetlands components ... Northeast Regional Ocean Council.
1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, and 2013. Nature Conservancy (U.S.). This shellfish habitat layer was derived from datasets from Maine, Massachusetts and New Hampshire state GIS resources. Shapefiles downloaded/provi... Northeast Ocean Data.
2013. United States. National Oceanic and Atmospheric Administration, Coastal Services Center (U.S.), United States. Department of Commerce, and United States. National Ocean Service. This polygon shapefile represents danger zones and restricted areas in the Northeastern United States. Danger Zone - A defined water area (or areas... Coastal Services Center (U.S.).
176. Atlantic coast
Bathymetry shown by soundings and isolines, relief shown by hachures and spot heights. Includes notes on buoys, tides, soundings and authorities. I... United States Coast and Geodetic Survey.
1847. Mitchell, S. Augustus (Samuel Augustus), 1792-1868. Longitude in degrees west from Greenwich and east from Washington, D.C.; latitude in degrees north from equator.; Colored by county; borders of sta... S.A . Mitchell (Philadelphia, Pa).
178. A new and accurate map of the colony of Massachusets [sic] Bay in North America, from a late survey
1780. Scale approximately 1:920,000.; 1 map; 25 x 31 cm Massachusetts--Maps--Early works to 1800.
2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, and 2016. Gap Analysis Program (U.S.). This polygon shapefile contains combined PAD-US Fee and Easements features for Massachusetts. The USGS Protected Areas Database of the United State... Gap Analysis Program (U.S.).
2000. U.S. Census Bureau. Geography Division. This polygon shapefile represents the elementary school district boundaries in Massachusetts. School districts are geographic entities within which... U.S. Census Bureau. Geography Division.