Hard-Soft Seafloor Classification, 40m - Swains, American Samoa

Preliminary hard and soft seafloor substrate map derived from an unsupervised classification of multibeam backscatter and bathymetry derivatives at Swains Island, American Samoa. The dataset was created from gridded (40 m cell size) multibeam bathymetry derivatives collected aboard R/V AHI, and NOAA ship Hi'ialakai; two scales of bathymetric variance and bathymetric rugosity. Backscatter data were from a 300 kHz Simrad EM300 and a 240 kHz Reson 8101 sonar, gridded at 5 m. Very limited seafloor photographs for groundtruthing are available for Swains Island 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 Swains Island 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).

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2021-03-30

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Distributor Pacific Islands Benthic Habitat Mapping Center (PIBHMC)
Point of Contact Pacific Islands Benthic Habitat Mapping Center (PIBHMC)
pibhmc@soest.hawaii.edu
Online Resource
Originator Pacific Islands Benthic Habitat Mapping Center (PIBHMC)
pibhmc@soest.hawaii.edu
Online Resource
Publisher Pacific Islands Ocean Observing System (PacIOOS)
info@pacioos.org
Online Resource
Dataset Point of Contact Pacific Islands Ocean Observing System (PacIOOS)
info@pacioos.org
General Documentation

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Associated Documentation Pacific Islands Ocean Observing System (PacIOOS)
Date(s) creation: 2016-01-25
issued: 2016-01-25
revision: 2016-01-25
creation: 2016-01-25
issued: 2016-01-25
revision: 2016-01-25
creation: 2016-01-25
issued: 2016-01-25
revision: 2016-01-25
creation: 2016-01-25
issued: 2016-01-25
revision: 2016-01-25
Purpose PacIOOS provides timely, reliable, and accurate ocean information to support a safe, clean, productive ocean and resilient coastal zone in the U.S. Pacific Islands region.
Use Limitations The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, University of Hawaii, PacIOOS, NOAA, State of Hawaii nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.
Spatial Bounding Box Coordinates N: -10.876° S: -11.211° E: -170.861° W: -171.28°
Theme keywords GCMD Science Keywords
  • Earth Science > Land Surface > Geomorphology > Coastal Landforms/Processes
  • Earth Science > Oceans > Bathymetry/Seafloor Topography > Hard Seafloor Substrate
  • Earth Science > Oceans > Bathymetry/Seafloor Topography > Soft Seafloor Substrate
Data Center keywords GCMD Data Center Keywords
  • PacIOOS > Pacific Islands Ocean Observing System
Place keywords GCMD Location Keywords
  • Ocean > Pacific Ocean > South Pacific Ocean > Polynesia > American Samoa > Swains
Project keywords GCMD Project Keywords
  • PacIOOS > Pacific Islands Ocean Observing System
Use Constraints The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, University of Hawaii, PacIOOS, NOAA, State of Hawaii nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.
Lineage Statement 2016-01-25T00:00:00Z OGC web services (WMS and WFS) enabled by PacIOOS via GeoServer. Original data from source provider may have been reformatted, reprojected, or adjusted in other ways to optimize these capabilities.
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