Open-File Report 2014–1018
SI to Inch/Pound
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 (NAD 83); horizontal information in geographic coordinates is referenced to the World Geodetic System 1984 (WGS 84). 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].
BASE - bathymetry adjusted for statistical error
DGPS - differential global positioning system
FAQ - frequently asked questions
GCS - Geographic Coordinate System
GIS - geographic information system
HTML - Hyperlink Text Markup Language
kHz - kilohertz
µm - micrometer
MBES - multibeam echosounder
MLLW - mean lower low water
NAD 83 - North American Datum of 1983
NOAA - National Oceanic and Atmospheric Administration
RV - research vessel
SEABOSS - Seabed Observation and Sampling System
s - second
USGS - U.S. Geological Survey
UTM - Universal Transverse Mercator
WGS 84 - World Geodetic System of 1984
XML - Extensible Markup Language