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) 20081130 raster digital data http://www.soest.hawaii.edu/pibhmc BPI Structures are derived from two scales of a focal mean analysis on bathymetry and slope. The grid is based on gridded (10 m cell size) multibeam bathymetry, collected aboard NOAA Ship Hi'ialakai and R/V AHI, and it was created using the Benthic Terrain Modeler (http://www.csc.noaa.gov/products/btm/). Cell values represent one of 14 classes in an index of seafloor terrains. This data set is for the shelf and slope environments of Farallon de Pajaros Island. As part of the northern islands of the Mariana Islands archipelago, the island's offshore shelf is above -60m. A deep shelf (below -60m) northeast of the island may be reminiscent of a second and recently active volcanic cone. The data were derived in support of Coral Reef Conservation Program goals. Goal 1 is to map all U.S. Coral Reef Ecosystems. This data set specifically addresses Objective 1 and 4: to develop high-resolution benthic maps and to characterize priority deep water reefs and associated habitats. This derivative of bathymetry provides a GIS layer that may be used for benthic and essential fish habitat characterization, and for the study of geologic features. By combining the dataset with bathymetry, backscatter, other derivatives, and in situ data, they collectively compose benthic habitat maps which are designed to be used to understand and predict moderate depth (~10m to 800m) benthic habitats for coral reef ecosystems. Gridded multibeam data were collected aboard the Hi'ialakai, a 218' United States National Oceanographic and Atmospheric Administration (NOAA) research ship, and aboard the R/V AHI (Acoustic Habitat Investigator), a 25' survey launch owned and operated by the NOAA Pacific Islands Fisheries Science Center in Honolulu, HI. The metadata for the bathymetry is documented in the product metadata, uracas_10m.txt. (http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_bathy.htm) References: Lundblad et al., 2006, A benthic terrain classification scheme for American Samoa, Marine Geodesy, 29(2):89 - 111. http://www.csc.noaa.gov/products/btm/ The terrestrial elevation data shown in the map for this data set are a United States Geological Survey Digital Elevation Models. 20070525 20070608 ground condition Complete As needed 144.865 144.929 20.570 20.519 CoRIS Discovery Thesaurus Geographic Information > Habitats ISO 19115 Topic Category imageryBaseMapsEarthCover 010 CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetric Position Index Structures EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > geomorphology Mapping None Bathymetric Position Index Structures Bathymetry Multibeam sonar None Farallon de Pajaros Uracas Island Commonwealth of the Northern Mariana Islands United State of America CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Farallon de Pajaros > Farallon de Pajaros (20N144E0001) COUNTRY/TERRITORY > Northern Mariana Islands > Farallon de Pajaros > Farallon de Pajaros (20N144E0001) CoRIS Region CNMI None These data are not to be used for navigation purposes. Please acknowledge the NOAA Pacific Islands Fisheries Science Center (PIFSC) Coral Reef Ecosystem Division (CRED) and the Pacific Islands Benthic Habitat Mapping Center (PIBHMC), and the Joint Institute for Marine and Atmospheric Research (JIMAR) as the sources of this information. http://www.soest.hawaii.edu/pibhmc/CNMI_images/FDP_10m_BPIstructures_445.jpg Gridded Bathymetry Derivative JPG NOAA PIFSC CRED PIBHMC and JIMAR Not applicable Unclassified Not applicable ArcGIS ASCII file, derived from bathymetry and slope in ArcGIS 9.3 (Spatial Analyst and Benthic Terrain Modeler) 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 C/A Horizontal position accuracy: 25 meters Range resolution of sonar: varies with depth Raw sounding resolution: varies with depth Vertical accuracy of gridded product ~ 1% of water depth Bathymetric Position Index Structures were derived from the gridded multibeam bathymetry (uracas_10m) using the Benthic Terrain Modeler (BTM). The BTM (written for ArcGIS 8.x or 9.x) may be downloaded from http://dusk2.geo.orst.edu/djl/samoa/tools.html. BPI Structures are derived from two scales of a focal mean analysis on bathymetry and slope. After testing multiple scale factors at other northern islands within CNMI and applying them to Farallon de Pajaros, two scales (50 and 250) best identified fine scale structures for Farallon de Pajaros Island while minimizing noise and optimizing possible reef structures. In order to promote effective and accurate comparisons of islands, the same scale factors were used for the islands within CNMI and Guam. The Terrain Classification Builder (part of the BTM) was used to create the zone and structure grids. Three ranges of slope define flats, slopes, and near vertical: x < 5; 5 < x < 70; x > 70. Depth bounds separated flat structures into shelf (0 to -60m) and deep shelf (-60m to -1000m) environments. The same depths were used for all of the northern islands within CNMI. 20081123 Raster Grid Cell 560 659 1 Universal Transverse Mercator 55 0.9996 147 0 500000 0 Row and Column 10 10 meters D_WGS_1984 WGS_1984 6378137.000000 298.257224 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) John Rooney 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. Arc ASCII Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCIItoRaster). http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_fdp_geomorph.htm None 20121214 20090916 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 20090916072926 None 20070525 20070608 http://www.coris.noaa.gov/metadata/records/html/fdp_10m_bpistructures.html 4088