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    • Mosaic of gridded multibeam bathymetry and bathymetry derived from multispectral IKONOS satellite imagery of Ofu and Olosega Islands, Territory of American Samoa, USA

    Metadata Updated: January 31, 2026

    Gridded multibeam bathymetry is integrated with bathymetry derived from multipectral IKONOS satellite data. Gridded (5 m cell size) multibeam bathymetry collected aboard NOAA Ship Hiialaka'i and R/V AHI. Bathymetry values shallower than 25 m were derived by gauging the relative attenuation of blue and green spectral radiance as a function of depth. A multiple linear regression analysis of linearized blue and green band spectral values against depth determined the variables of y-intercept, blue slope and green slope values. Variables then used in multivariate slope intercept formula to derive depth. Variables were adjusted to improve the statistical accuracy and spatial coverage of the final derived bathymetry product. Digital image processing to derive depths conducted with the ENVI 4.3 software program while data editing and integration was performed using ArcGIS 9.3. This data set is for the shelf environment of Ofu and Olosega Islands, American Samoa.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date December 15, 2024
    Metadata Created Date January 31, 2026
    Metadata Updated Date January 31, 2026
    Reference Date(s) December 3, 2008 (publication)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from CoRIS FGDC Metadata

    Other Data Resources

    Graphic Preview

    Gridded Bathymetry

    Additional Metadata

    Resource Type Dataset
    Metadata Date December 15, 2024
    Metadata Created Date January 31, 2026
    Metadata Updated Date January 31, 2026
    Reference Date(s) December 3, 2008 (publication)
    Responsible Party NOAA PIFSC CRED PIBHMC and DJLab OSU (Point of Contact)
    Contact Email
    Guid oo_dbmb_mos4_metadata
    Access Constraints Use Constraints: These data are not to be used for navigation purposes. Please acknowledge NOAA Pacific Islands Fisheries Science Center, the Joint Institute for Marine and Atmospheric Research (JIMAR) University of Hawaii and Davey Jones Locker GIS Laboratory Oregon State University as the sources of this information., Access Constraints: None
    Bbox East Long -169.583687
    Bbox North Lat -14.133505
    Bbox South Lat -14.203385
    Bbox West Long -169.705274
    Coupled Resource
    Frequency Of Update asNeeded
    Graphic Preview Description Gridded Bathymetry
    Graphic Preview File https://www.soest.hawaii.edu/pibhmc/amsamoa_images/OfuOlo_bathymetry_mb&IKONOS_445.jpg
    Graphic Preview Type jpeg
    Harvest Object Id 553259c4-c004-4d2a-84ca-d224cd0943a8
    Harvest Source Id d96f14c5-3e35-4b0a-a3b8-9392afeb50fa
    Harvest Source Title CoRIS FGDC Metadata
    Licence 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.
    Lineage
    Metadata Language eng; USA
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-169.705274, -14.203385], [-169.583687, -14.203385], [-169.583687, -14.133505], [-169.705274, -14.133505], [-169.705274, -14.203385]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System urn:ogc:def:crs:EPSG::4326
    Spatial Harvester True
    Temporal Extent Begin 2002-04-07
    Temporal Extent End 2004-02-12

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