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|State||Coast/area ratio (ft/mi2) Method 1|
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Published July 24th, 2017
Two separate measurements are used: method 1 only includes states with ocean coastline and excludes tidal inlets; method 2 includes Great Lake coastline and the extra length from tidal inlets. For example, method 2 counts the Great Bay as part of New Hampshire's coastline, but method 1 does not. The figures suffer from the inaccuracy inherent in all attempts at measuring coastlines but are nevertheless useful for comparison. The data for method 1 were retrieved from a CRS Report for Congress using data from U.S. Department of Commerce, National Oceanic and Atmospheric Administration, The Coastline of the United States, 1975. This is based on measurements made using large-scale nautical charts. The figure for Connecticut was arrived at separately and may not reflect the correct comparative distance. These numbers exclude the Great Lakes coastlines. The data for method 2 are from a list maintained by the Office of Ocean and Coastal Resource Management of the National Oceanic and Atmospheric Administration (NOAA). The state coastline lengths were computed by an unspecified method that includes tidal areas not included in the first method. These numbers also include the Great Lakes coastlines.