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U.S. Geological Survey Open-File Report 2012–1004

Sea-Floor Geology in Central Rhode Island Sound South of Sakonnet Point, Rhode Island

Conversion Factors

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SI to Inch/Pound

Multiply By To obtain
millimeter (mm) 0.03937 inch (in.)
centimeter (cm) 0.3937 inch (in.)
meter (m) 3.281 foot (ft)
meter (m) 1.094 yard (yd)
kilometer (km) 0.6214 mile (mi)
kilometer (km) 0.5400 mile, nautical (nmi)
square meter (m²) 10.76 square foot (ft²)
square kilometer (km²) 0.3861 square mile (mi²)

Phi-notation (Krumbein, 1934) as used in this report is defined as Φ = -log2 (d), where d is the grain diameter in millimeters. Phi-class intervals in millimeters are given in the data dictionary in the Sediments section of this report.

The frequency of multibeam bathymetry is measured in kilohertz (kHz), 1,000 cycles per second.

Horizontal coordinate information projected in Universal Transverse Mercator (UTM) Zone 19 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) [the average of the lower low water height of each tidal day observed over the national tidal datum epoch].

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