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) 20110429 raster digital data http://www.soest.hawaii.edu/pibhmc http://www.soest.hawaii.edu/pibhmc/pibhmc_pria_wak_geomorph.htm Slope is derived from gridded (10 m cell size) multibeam bathymetry, collected aboard NOAA ship Hi'ialakai and R/V AHI. Cell values reflect the maximum rate of change (in degrees) in elevation between neighboring cells derived with the ArcGIS Spatial Analyst extension. This data set is for Wake Island, West Central Pacific. The data were derived in support of NOAA 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 (~20m - 150m) benthic habitats for different organisms that inhabit coral reef ecosystems. Multibeam data were collected aboard the NOAA Ship Hi'ialakai, a 218' United States National Oceanographic and Atmospheric Administration research ship. The NOAA Ship Hiialakai's survey sensors include a 30 kHz Simrad EM300 sonar and a 300 kHz Simrad EM3002d sonar, which provide bathymetry and imagery data, a TSS/Applanix POS/MV Model 320, which measures position,velocity, attitude and heading, and a Seabird SBE 9/11 plus CTD used to measure sound velocity profiles. Multibeam data were also collected 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 R/V AHI's survey sensors include a 240 kHz RESON 8101-ER sonar providing bathymetry and imagery data, a TSS/Applanix POS/MV Model 320 which measures position, velocity, attitude and heading, and a Seabird SBE 19 CTD used to measure sound velocity profiles. The metadata for the bathymetry is documented in the product metadata, Wake_10m.asc.txt. 20070419 20070509 ground condition Complete As needed 166.582 166.667 19.337 19.240 CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > geomorphology Mapping EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Slope CoRIS Discovery Thesaurus Geographic Information > Habitats ISO 19115 Topic Category imageryBaseMapsEarthCover 010 CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Wake Atoll (19N167E0001) OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Wake Atoll > Wake Atoll (19N167E0001) CoRIS Region PRIA 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, and the Joint Institute for Marine and Atmospheric Research (JIMAR) and School of Ocean and Earth Science and Technology (SOEST), 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) 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 http://www.soest.hawaii.edu/pibhmc/PRIAs_images/Wake_10m_Slope_440.jpg Gridded Bathymetry JPG NOAA PIFSC CRED and the Pacific Islands Benthic Habitat Mapping Center, JIMAR and SOEST Not applicable Unclassified Not applicable 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 The Spatial Analyst extension was used in ArcMap 9.3 to derive slope from the gridded (5m) bathymetry. Spatial Analyst --> Surface Analysis --> Slope using the following parameters: Input surface: Wake_10m; Output measurement: Degree; Z factor: 1; Output cell size: 5 20110120 Raster Grid Cell 1084 1103 1 Universal Transverse Mercator 58 0.9996 165 0 500000 0 Row and Column 10 10 meters D_WGS_1984 WGS_1984 6378137.000000 298.257224 none 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. Arc ASCII Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCIItoRaster). ftp://ftp.soest.hawaii.edu/pibhmc/website/data/pria/benthichabitatlayers/Wake_10m_Slope.zip None 20121217 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 20110502051335 None 20070419 20070509 http://www.coris.noaa.gov/metadata/records/html/wake_10m_slope.html 6259