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The Massachusetts Area of Critical Environmental Concern (ACEC) Program is a list of state-designated places within the Commonwealth that receive special attention due to their natural and cultural resources. The program was established in 1975 and includes a list of thirty ACECs covering over 268,000 acres in seventy six communities throughout ...
The NWI relies on trained image analysts to identify and classify wetlands and deepwater habitats from aerial imagery. NWI started mapping wetlands at a small scale (1:250,000 map which covers an area the size of 128-1:24,000 USGS topographic maps or approximately 7,400 square miles).
Online collection of all digital USGS 1:24K scale topographic maps (as well as various other GIS data) covering the United States, available as a free download. NPScape United States Department of the Interior National Park Service NPScape is a landscape dynamics monitoring project that provides landscape-level data, tools, and evaluations for ...
The following is a list of properties managed by The Trustees of Reservations (TTOR), a non-profit land conservation and historic preservation organization dedicated to preserving natural and historical places in the Commonwealth of Massachusetts.
Currently the Wetlands Geodatabase contains over 34,500 7.5 minute map areas in a seamless ArcSDE geodatabase format. This represents wetland map data for approximately 64 percent of the conterminous U.S., 30 percent of Alaska, 100 percent of the windward islands of Hawaii, 77 percent of Puerto Rico and the U.S. Virgin Islands and, 100 percent ...
The watershed area can then be estimated using a planimeter, by overlaying graph paper and counting grid cells, or the result can be digitized for use with mapping software. The same process can be done on a computer, sketching the watershed boundary (with a mouse or stylus) over a digital copy of a topographic map. [1]
A set of searchable maps, available online to the public, zooms in on Alameda, Marin, San Francisco and San Mateo counties — the first of many jurisdictions that researchers hope will undergo ...
Massachusetts, with forests covering 3,060,000 acres (12,400 km 2) (59%) of its land area, administers more than 500,000 acres (2,000 km 2) [1] of state forest, wildlife and watershed land under the cabinet level Executive Office of Energy and Environmental Affairs.