NOAA TIFF Image- 0.5 meter Backscatter Mosaic of Grammanik Bank - East (St. Thomas), US Virgin Islands, Project NF-05-05, 2005, UTM 20 NAD83 NF05_USVI_GramBankSTT_Backscatter_halfmeter_Metadata eng Dataset elevation environment geoscientificInformation imageryBaseMapsEarthCover oceans Bathymetry/Topography Acoustic Backscatter Benthic Biogeography Coral GIS Habitat IOCM Integrated Ocean and Coastal Mapping MBES Mosaic Multibeam NF-05-05 NOAA NPS Nancy Foster Raster Reef Reson 8101 SWMB Seafloor Sonar US Virgin Islands USVI 2005 BIRNM BUIS Buck Island Buck Island Reef National Monument Grammanik Grammanik Bank MSR Mid Shelf Reef Salt River Salt River Bay National Historical Park and Ecological Reserve St. Croix St. Thomas VICR VIIS This image represents a 0.5 meter resolution backscatter mosaic of Grammanik Bank, south of St. Thomas, US Virgin Islands.NOAA's NOS/NCCOS/CCMA Biogeography Team, in collaboration with NOAA vessel Nancy Foster and territory, federal, and private sector partners, acquired multibeam bathymetry data in the US Virgin Islands from 2/1/05 to 2/12/05. Data was acquired with a pole-mounted Reson 8101 ER multibeam echosounder (240 kHz) and processed by a NOAA contractor using CARIS HIPS v5.4 software. Data has all correctors applied (attitude, sound velocity) and has been reduced to mean lower low water (MLLW) using final approved tides from NOAA COOPS. Data is in UTM zone 20 north, datum WGS84. The backscatter component of the bathymetry data were processed by the Hawaii Mapping Research Group (HMRG), University of Hawaii using the HAWAII MR1 Sidescan Sonar Software Suite. The data were corrected for angle varying gain, transmit power and pulse width. Electronic and acoustic noise, such as striping due to across track variations in amplitude and speckling due to transducer motion, were removed.The project was conducted to meet IHO Order 1 and 2 accuracy standards, dependant on the project area and depth. All users should individually evaluate the suitability of this data according to their own needs and standards. National Centers for Coastal Ocean Science National Centers for Coastal Ocean Science https://www.fisheries.noaa.gov/inport/item/38824 https://www.fisheries.noaa.gov/inport/item/37205 northlimit=17.789306; eastlimit=-64.588723; southlimit=17.765934; westlimit=-64.657848; start=2005-02-01; end=2005-02-12; Please cite any use of this data. 2006-03