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U.S. Geological Survey Open-File Report 2010–1150

Sea-Floor Geology and Topography Offshore in Eastern Long Island Sound

Conversion Factors

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SI to Inch/Pound

Multiply By To obtain
centimeter (cm) 0.3937 inch (in.)
millimeter (mm) 0.03937 inch (in.)
meter (m) 3.281 feet (ft)
kilometer (km) 0.6214 mile (mi)
kilometer (km) 0.5400 mile, nautical (nmi)
meter (m) 1.094 yard (yd)
square kilometer (km²) 0.3861 square mile (mi²)

Phi-notation (Krumbein, 1934) as used in this report is defined as: Φ = -log 2 (d), where d is the grain diameter in millimeters. Phi-class intervals in millimeters are given in the data dictionary of the Sediments section.

Current speeds are measured in knots (kn). 1 knot = 0.514 m/s.

The frequencies of sidescan sonar and multibeam bathymetry are measured in kilohertz (kHz), one thousand periods per second.

Horizontal coordinate information projected in Universal Transverse Mercator is referenced to the North American Datum of 1983 (NAD83); horizontal information in geographic coordinates is referenced to the World Geodetic System 1984 (WGS84). The vertical datum for tidal-zone measurements is mean lower low water (MLLW).

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