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Open-File Report 2015-1149

Sea-Floor Morphology and Sedimentary Environments in Southern Narragansett Bay, Rhode Island

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Conversion Factors, Datum, and Abbreviations

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 kilometer (km²) 247.1 acre
square kilometer (km²) 0.3861 square mile (mi²)
centimeter per second (cm/s) 0.03281 foot per second (ft/s)
milligram (mg) 0.00003527 ounce, avoirdupois (oz)

Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:


Horizontal coordinate information projected in Universal Transverse Mercator (UTM) zone 19 is referenced to the North American Datum of 1983 (NAD 83); horizontal information in geographic coordinates is referenced to the World Geodetic System 1984 (WGS 84). Vertical datum for tidal-zone measurements is mean lower low water (MLLW).

Altitude, as used in this report, refers to distance above the vertical datum.

Supplemental Information

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” of the Sediments section of this report.

The frequency of multibeam bathymetry is measured in hertz (Hz), one period per second.


ASCII - American Standard Code for Information Interchange
BAG - bathymetric attributed grid
CARIS - Computer Aided Resource Information System
DGPS - differential global positioning system
GCS - Geographic Coordinate System
GeoTIFF - geospatial tagged image file format
GIS - geographic information system
HIPS - Hydrographic Information Processing System
HTML - hypertext markup language
MBES - multibeam echosounder
NGDC - National Geophysical Data Center
NOAA - National Oceanic and Atmospheric Administration
RV - research vessel
SEABOSS - Seabed Observation and Sampling System
USGS - U.S. Geological Survey
XML - extensible markup language

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