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- Shelf Bathymetry (depth in meters), Ofu and Olosega Islands, American Samoa
Shelf Bathymetry (depth in meters), Ofu and Olosega Islands, American Samoa
Jul 6, 2010
(Last modified Jul 7, 2010)
Uploaded by
Conservation Biology Institute
- Description:
- Gridded multibeam bathymetry is integrated with bathymetry derived from multispectral 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.
Water depth is displayed in meters (m).
- Data Provided By:
- NOAA PIFSC CRED, the Pacific Islands Benthic Habitat Mapping Center and Davey Jones Locker GIS Laboratory, Oregon State University
- Content date:
- not specified
- Contact Organization:
- USGS, Anchorage, AK
- Contact Person(s):
- 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.
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About the Uploader
Conservation Biology Institute
We provide advanced conservation science, technology, and planning to empower our partners in solving the world’s critical ecological challenges
