Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA) 20110430 digital data http://www.soest.hawaii.edu/pibhmc http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_35fth_37fth.htm Gridded bathymetry (5m) of the bank environment of 35-fthm Bank and 37 fthm Bank,CNMI USA. These netCDF and ASCII grids include multibeam bathymetry from the Reson 8101 multibeam sonar aboard the NOAA Ship Oscar E. Sette collected as of May 2010 by the NOAA Coral Reef Ecosystem Division in depths between 10 and 300 meters. These netCDF and ASCII grids were created using data gathered from multibeam soundings for use as a planning and reference document. The data are also being used for benthic habitat mapping, for locating Essential Fish Habitat, and for studying geologic features of the area. Refer to supplemental information for description of instrument and survey. Multibeam data were collected aboard the NOAA Ship Oscar Elton Sette, a 224' (68 m) United States National Oceanographic and Atmospheric Administration research ship. The NOAA Ship Sette's survey sensors included a 240-kHz pole- mounted Reson 8101ER sonar, which provides bathymetry and imagery data, a TSS/Applanix POS/MV Model 320, which measures position,velocity, attitude and heading, and a Seabird SBE19 CTD used to measure sound velocity profiles. Specific equipment configurations are documented in metadata from cruise SE1002. These metadata can be accessed at: http://www.soest.hawaii.edu/pibhmc/pibhmc_cruise-catalog.htm Raster_Object_Information: 37fthm_5m Raster_Object_Type: Grid Cell Row_Count: 2769 Column_Count: 1078 Vertical_Count: 1 Raster_Object_Information: 35fthm_5m Raster_Object_Type: Grid Cell Row_Count: 1432 Column_Count: 2397 Vertical_Count: 1 20100211 20100314 ground condition Complete As needed 146.002591 146.119888 16.471340 16.233543 CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry ISO 19115 Topic Category elevation 006 CoRIS Discovery Thesaurus Geographic Information > Bathymetry None Bathymetry Multibeam sonar None Farallon de Medinilla CNMI United States of America None 35 fthm Bank CNMI United States of America None 37 fthm Bank CNMI United States of America CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Farallon de Medinilla > Farallon de Medinilla (16N145E0002) COUNTRY/TERRITORY > Northern Mariana Islands > Farallon de Medinilla > Farallon de Medinilla (16N145E0002) CoRIS Region CNMI none These data are not to be used for navigation purposes. Please acknowledge NOAA and the Joint Institute for Marine and Atmospheric Research (JIMAR) University of Hawaii as the sources of this information. Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA) mailing and physical address

1125B Ala Moana Blvd.

Honolulu HI 96814 (808) 983-3776 (808) 983-2902 pibhmc@soest.hawaii.edu e-mail preferred http://www.soest.hawaii.edu/pibhmc/CNMI_images/35fth_37fth_bank_5m_bathy_4.jpg Multibeam Bathymetry JPEG PIBHMC, CRED, PIFSC, NOAA and JIMAR Not applicable Unclassified Not applicable netCDF file created using the Generic Mapping Tools (GMT) and ArcGIS ASCII file, both created in a LINUX environment Data are collected for resource management and research purposes and are tested for internal consistency; however, no effort is made to compare these data to external references or to other published data. These data are believed to be logically consistent though no tests were performed Complete Horizontal positioning system: GPS (SPS) Horizontal position accuracy: 25 m 1 m Raw sounding resolution: Variable Multibeam swath files are acquired in the Generic Sensor Format (GSF) and are edited on a swath by swath basis using SAIC's SABER editing software. The edited swath files are then combined into a Pure File Magic (PFM) format in SABER and area based editing is performed. During processing it was necessary to change the roll bias parameter in the swath data from +0.13 to -0.1 (determined empirically)in order to reconcile adjoining swaths; this would indicate that the pole-mounted sonar shifted from the original settings determined during a patch test. The edited PFM is then exported as X,Y,Z. The resulting X,Y,Z data are then gridded using xyz2grd, a Generic Mapping Tools (GMT) algorithm that converts an ASCII or binary table to a netCDF grid file format. GMT is an open source collection of tools for manipulating geographic data sets. Grid nodes with more than one value are set to the average value and unconstrained nodes are set to NaN. Finally, the netCDF grid is clipped at a depth that minimizes data gaps for the specified grid cell size and then converted to an ArcGIS ASCII file format using LINUX/UNIX commands in combination with GMT. Additional information about GMT can be found at: www.soest.hawaii.edu/gmt and additional information about the multibeam data processing is recorded in the cruise metadata. 20110331 Raster Universal Transverse Mercator 55 .9996 -147 0 500000 0 Row and Column 5 5 meters D_WGS_1984 WGS_1984 6378137.000000 298.257224 mean lower low water 0.01 meters Attribute Values Depth values are real values based on the average of the soundings that fell within the extracted grid cells. The number of soundings per grid cell range from >1000 soundings in shallow depths to as few as 20 soundings in deeper areas. A total error budget for this survey has not been developed. Therefore, the accuracy of depth measurements should be considered to be within 1 meter. none Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA) mailing and physical address

1125B Ala Moana Blvd.

Honolulu HI 96814 (808) 983-3776 (808) 983-2902 pibhmc@soest.hawaii.edu e-mail preferred Downloadable Data These data are not to be used for navigational purposes. NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA cannot assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system. netCDF and Arc ASCII These data can be downloaded as either a 2-D binary netCDF raster grid or an ArcGIS ASCII text file. The netCDF grid is the default grid file format used by GMT (Generic Mapping Tools), which created this file. More information can be located at http://www.soest.hawaii.edu/gmt/and http://www.unidata.ucar.edu/software/netcdf/. The Arc ASCII file, for use in ESRI's (http://www.esri.com) GIS software, can be converted to an Arc Raster Grid using ArcToolbox ASCII to Raster conversion tool. ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/bathymetry/35_37fthm_5m.asc.zip None 20121214 20110502 Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA) mailing and physical address

1125B Ala Moana Blvd.

Honolulu HI 96814 (808) 983-3776 (808) 983-2902 pibhmc@soest.hawaii.edu e-mail preferred FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 Universal Time None None 20110502062632 None 20100211 20100314 http://www.coris.noaa.gov/metadata/records/html/fdm_35fth_37fth_bank_5m_bathy.html 6266