Preliminary hard and soft bottom seafloor substrate map derived from an unsupervised classification of gridded backscatter and bathymetry derivatives at Ofu and Olosega Islands, Territory of American Samoa, USA.
Preliminary hard and soft seafloor substrate map derived from an unsupervised classification of multibeam backscatter and bathymety derivatives at Ofu and Olosega Islands, Territory of American Samoa, USA . The dataset was derived using Reson 8101 backscatter data, bathymetric variance and bathymetric rugosity. The sonar frequency is 240 kHz for the Reson 8101 backscatter data, which were resampled to a 5 m grid cell size prior to the classification. Limited seafloor photographs for groundtruthing are available for Ofu and Olosega Islands 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.
Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | non-public |
| contactPoint |
{
"fn": "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)",
"@type": "vcard:Contact",
"hasEmail": "mailto:nmfs.pic.credinfo@noaa.gov"
}
|
| describedByType | application/octet-steam |
| description | Preliminary hard and soft seafloor substrate map derived from an unsupervised classification of multibeam backscatter and bathymety derivatives at Ofu and Olosega Islands, Territory of American Samoa, USA . The dataset was derived using Reson 8101 backscatter data, bathymetric variance and bathymetric rugosity. The sonar frequency is 240 kHz for the Reson 8101 backscatter data, which were resampled to a 5 m grid cell size prior to the classification. Limited seafloor photographs for groundtruthing are available for Ofu and Olosega Islands 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. |
| distribution |
[
{
"@type": "dcat:Distribution",
"mediaType": "placeholder/value",
"downloadURL": "http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_ofu_geomorph.htm",
"describedByType": "application/octet-steam"
}
]
|
| identifier | oo_5m_hardsoft |
| issued | 2010-10-13T00:00:00.000+00:00 |
| keyword |
[
"CoRIS_Metadata",
"Benthic Habitat Mapping and Characterization in the Pacific Islands Region",
"467",
"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",
"Geographic Information > Habitats",
"Ofu Island",
"Olosega Island",
"American Samoa",
"United States of America",
"OCEAN BASIN > Pacific Ocean > Manu'a Group > Ofu (14S169W0002)",
"COUNTRY/TERRITORY > United States of America > American Samoa > Ofu Island > Ofu (14S169W0002)",
"OCEAN BASIN > Pacific Ocean > Manu'a Group > Olosega (14S169W0016)",
"COUNTRY/TERRITORY > United States of America > American Samoa > Olosega Island > Olosega (14S169W0016)",
"AmSam"
]
|
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2010-10-13T00:00:00.000+00:00 |
| publisher |
{
"name": "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)",
"@type": "org:Organization"
}
|
| rights | otherRestrictions, unclassified |
| spatial | -169.583687,-14.203385,-169.705274,-14.133505 |
| temporal | 2005-04-06T00:00:00+00:00/2008-05-28T00:00:00+00:00 |
| title | Preliminary hard and soft bottom seafloor substrate map derived from an unsupervised classification of gridded backscatter and bathymetry derivatives at Ofu and Olosega Islands, Territory of American Samoa, USA. |
