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2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, and 2022. United States. National Oceanic and Atmospheric Administration. This line shapefile represents existing and planned electric transmission lines through 2022 in the New England coastal region (United States). A t... United States. National Oceanic and Atmospheric Administration.
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. A caldera is a large, generally circular depre... Geological Survey (U.S.) and National Atlas of the United States.
2005. Geological Survey (U.S.). This map layer contains locations and information on faults and associated folds, in the United States, that are believed to be sources of signific... National Atlas of the United States.
2005. Geological Survey (U.S.). This line shapefile represents railroads in the conterminous United States and Alaska at 1:2,000,000. This is a replacement for the December 1998 m... Geological Survey (U.S.).
2010. United States. National Oceanic and Atmospheric Administration, United States. Department of Commerce, United States. National Ocean Service, and Coastal Services Center (U.S.). This line shapefile depicts the location of submarine cables as defined by the NOAA Electronic Navigation Charts and the NOAA Raster Nautical Chart... Coastal Services Center (U.S.).