rose_5m_hardsoft eng; USA utf8 dataset 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) 808 725-5360 808 725-5429 NOAA IRC NMFS/PIFSC/CRED 1845 WASP Blvd., Building 176 Honolulu HI 96818 nmfs.pic.credinfo@noaa.gov e-mail preferred pointOfContact 2024-12-15 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) 3 row 835 column 917 vertical 1 area World Geodetic System 1984 WGS 84 2007-08-27 revision https://epsg.org/crs_4326/WGS-84.html WGS 84 GML of World Geodetic System 1984 coordinate reference system. information resourceProvider European Petroleum Survey Group https://epsg.org/home.html European Petroleum Survey Group Geodetic Parameter Registry Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations. search publisher urn:ogc:def:crs:EPSG::4326 Preliminary hard and soft bottom seafloor substrate map (5m grid) derived from an unsupervised classification of gridded backscatter and bathymetry derivatives at Rose Atoll Lagoon, Territory of American Samoa, USA. 2011-07-29 publication 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) originator DIGITAL DATA Preliminary hard and soft seafloor substrate map derived from an unsupervised classification of multibeam backscatter and bathymetry derivatives at Rose Atoll Lagoon, Territory of American Samoa, USA. The dataset was created from gridded (5 m cell size) multibeam bathymetry derivatives collected aboard R/V AHI; 2 scales of bathymetric variance and bathymetric rugosity, and from multibeam backscatter. Backscatter data were from a 240 kHz Reson 8101 sonar, gridded at 5 m. Very limited seafloor photographs for groundtruthing are available for Rose Atoll and therefore no supervised classification was performed and we are unable to visually or empirically evaluate the accuracy of the unsupervised classification seafloor substrate map. However, in locations such French Frigate Shoals, NWHI and Tutuila, American Samoa, where ground truth data are available, the unsupervised classification method is a robust predictor of substrate type in similar depth ranges and seafloor environments. Since groundtruthing was not used to validate the unsupervised classification at Rose Atoll Lagoon extreme caution should be used when examining these data to locate habitat of biological significance. The map should be used in conjunction with bathymetric derivatives such as rugosity, slope, and Bathymetric Position Index (BPI). The hard and soft seafloor map is being used to improve sampling techniques for long-term ecosystem monitoring, to guide future ground-truthing operations and to identify coral-rich and species specific environments. This is a preliminary product and the methods used to generate the map are currently being evaluated for their accuracy. PIBHMC, CRED, PIFSC, NOAA, and JIMAR completed 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) 808 725-5360 808 725-5429 NOAA IRC NMFS/PIFSC/CRED 1845 WASP Blvd., Building 176 Honolulu HI 96818 nmfs.pic.credinfo@noaa.gov e-mail preferred pointOfContact asNeeded https://www.soest.hawaii.edu/pibhmc/amsamoa_images/Rose_5m_hardsoft_440.jpg Hard and Soft Seafloor Substrate JPEG, PDF CoRIS_Metadata theme NCEI Geoportal Filter Benthic Habitat Mapping and Characterization in the Pacific Islands Region 467 project CRCP Project EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Habitats EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Rugosity EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > geomorphology Mapping EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > Habitat Mapping theme CoRIS Theme Thesaurus Geographic Information > Habitats theme CoRIS Discovery Thesaurus OCEAN BASIN > Pacific Ocean > American Samoa > Rose Atoll (14S168W0001) COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Rose Atoll (14S168W0001) place CoRIS Place Thesaurus AmSam place CoRIS Region 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. otherRestrictions Use Constraints: 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) and School of Ocean and Earth Science and Technology (SOEST), University of Hawaii as the sources of this information. otherRestrictions Access Constraints: None unclassified Not applicable Not applicable grid eng; USA imageryBaseMapsEarthCover -168.176635 -168.131605 -14.563367 -14.525078 2006-02-10 2006-03-13 Gridded multibeam data were 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 process for deriving the 5-m gridded multibeam bathymetry is described in Rose_5m.asc.txt, available on www.soest.hawaii.edu/pibhmc. The resulting grid (rose_5m.grd) was clipped using the ESRI ArcToolbox tool 'Extract by Mask' leaving only the multibeam data collected within the lagoon and excluding the narrow band of data around the upper slopes of the atoll. Classification was carried out just for this lagoon area, as classification using the full multibeam dataset was heavily affected by artifacts within this narrow band of data. The process for deriving the gridded multibeam backscatter is described in rose-8101-bs-1m.grd.txt. These data are gridded at 1m. Prior to classification the backscatter data were re-gridded at 5m, using the resample tool in the Arc Toolbox. The rugosity data used in this classification is also available on the same website, metadata describing the process of producing the rugosity grid is described in Rose_5m_rugosity.txt. The bathymetric variance grids were generated for use in the classification process and are not served separately. See the process description portion of this document for additional informaiton about how the variance and unsupervised layers were derived. A second classification was carried out using data collected on the slopes surrounding the atoll, and these are served separately on www.soest.hawaii.edu/pibhmc. Metadata for this second classification product is described in Rose_40m_hardsoft.txt. Entity and Attribute Overview: none Entity and Attribute Detail Citation: none Arc ASCII 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) 808 725-5360 808 725-5429 NOAA IRC NMFS/PIFSC/CRED 1845 WASP Blvd., Building 176 Honolulu HI 96818 nmfs.pic.credinfo@noaa.gov e-mail preferred distributor None ftp://ftp.soest.hawaii.edu/pibhmc/website/data/amsamoa/benthichabitatlayers/Rose_5m_HardSoft.zip download dataset Horizontal Positional Accuracy Report Horizontal positioning system: GPS (SPS) Horizontal position accuracy: 25 meters Vertical Positional Accuracy Report 1 m Range resolution of sonar ~1.25 cm Raw sounding resolution: Variable Vertical accuracy of gridded product: 1% of water depth Complete These data are believed to be logically consistent though no tests were performed Processing steps used to generate the backscatter, bathymetry, and bathymetric rugosity grids used in the unsupervised classification process are described in their own metadata that can be found at www.soest.hawaii.edu/pibhmc. Bathymetric variance was calculated from the 5 m multibeam bathymetry in a two-step process using ArcMap Version 9.2. The first step involved calculating the standard deviation of the bathymetry layer using the Neighborhood Statistic tool from the Spatial Analyst pull-down menu in ArcMap Version 9.2. Rectangular neighborhood settings were set to a height and width of 3 grid cells to create a small-scale variance layer. The standard deviation output was then squared using the ArcMap Raster Calculater tool. A large-scale variance layer was also generated using a rectangular neighborhood height and width of 5 grid cells. The fine-scale variance is useful for defining small features that may indicate the presence of sediment ripples or possible coral-rich areas whereas the large-scale variance is useful for defining seafloor ridges, pinnacles, and significant changes in slope. Bathymetric variance proved to be a useful tool in previous efforts to map seafloor habitats by Dartnell and Gardner (2004). Their publication can be downloaded from www.soest.hawaii.edu/pibhmc/pibhmc_documentation.htm. Bathymetric rugosity was calculated using the ArcGIS Benthic Terrain Modeler (D.J. Wright et al., 2005) accessible at https://coast.noaa.gov/digitalcoast//tools/btm/index.html. The layers were then opened as ESRI GRIDS in the image processing software package ENVI (Environment for Visualizing Images) Version 4.3. A multi-band images were then created with the backscatter, small- and large-scale variance, and rugosity. A mask was also created in ENVI for the dataset. Image classification was performed on the multi-band image using the K-Means unsupervised classification method, which calculates initial class means evenly distributed in the data space and then iteratively clusters the pixels into the nearest class using a minimum distance technique. More information about K-Means algorithm can be found in the ENVI documentation available at www.ittvis.com/envi/. The number of classes was set to two and all other options were set to default. Class color mapping was performed on the resulting classified images. The substrate types of hard and soft were assigned based on a visual interpretation of backscatter intensity and corresponding classes. 2011-02-21T00:00:00 otherRestrictions Metadata Access Constraints: None otherRestrictions Metadata Use Constraints: None annually This metadata was automatically generated from the FGDC Content Standards for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2016-01-11 version of the FGDC RSE to ISO 19115-2 transform. Translated from FGDC 2025-03-24T18:07:51.166Z Last Metadata Review Date: 2011-08-30 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) 808 725-5360 808 725-5429 NOAA IRC NMFS/PIFSC/CRED 1845 WASP Blvd., Building 176 Honolulu HI 96818 nmfs.pic.credinfo@noaa.gov e-mail preferred pointOfContact