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]. AbbreviationsBASE - 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 |