Return to search results
Preliminary hard and soft bottom seafloor substrate map derived from an unsupervised classification of gridded backscatter and bathymetry derivatives at French Frigate Shoals, Northwest Hawaiian Islands, USA
Preliminary hard and soft seafloor substrate map derived from an unsupervised classification of multibeam backscatter and bathymety derivatives at French Frigate Shoals, Northwestern Hawaiian Islands, USA. The dataset was derived using a combination of Simrad em3002d and Reson 8101 backscatter, bathymetric variance and bathymetric rugosity. The sonar frequencies are 300 kHz and 240 kHz for the em3002d and the 8101 data respectively and all data were resampled to 5 m grid cell size prior to the classification. Initial supervised classifications of the backscatter data into hard and soft seafloor substrates, using seafloor photographs for groundtruthing and to define regions of interest, were used to define unsupervised class types and to visually evaluate the accuracy of the unsupervised classification seafloor substrate map.
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 French Frigate Shoals, Northwestern Hawaiian Islands, USA. The dataset was derived using a combination of Simrad em3002d and Reson 8101 backscatter, bathymetric variance and bathymetric rugosity. The sonar frequencies are 300 kHz and 240 kHz for the em3002d and the 8101 data respectively and all data were resampled to 5 m grid cell size prior to the classification. Initial supervised classifications of the backscatter data into hard and soft seafloor substrates, using seafloor photographs for groundtruthing and to define regions of interest, were used to define unsupervised class types and to visually evaluate the accuracy of the unsupervised classification seafloor substrate map. |
| distribution |
[
{
"@type": "dcat:Distribution",
"mediaType": "placeholder/value",
"downloadURL": "https://www.soest.hawaii.edu/pibhmc/cms/data-by-location/northwest-hawaiian-islands/french-frigate-shoals/geomorphology/",
"describedByType": "application/octet-steam"
}
]
|
| identifier | ffs_5m_hardsoft |
| issued | 2009-09-01T00:00:00.000+00:00 |
| keyword |
[
"CoRIS_Metadata",
"Benthic Habitat Mapping and Characterization - Northwestern and Main Hawaiian Islands",
"1217",
"Geographic Information > Habitats",
"EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Hard Seafloor Substrate",
"EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Soft Seafloor Substrate",
"Hard bottom",
"Soft bottom",
"Unsupervised Classification",
"Acoustic Imagery",
"Multibeam Backscatter",
"Backscatter",
"Bathymetry",
"Multibeam sonar",
"Substrate",
"French Frigate Shoals",
"Hawaii",
"Northwestern Hawaiian Islands",
"United States of America",
"OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > French Frigate Shoals (24N166W0001)",
"COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > French Frigate Shoals (24N166W0001)",
"NWHI"
]
|
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2009-09-01T00:00:00.000+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 | -166.20088,23.649073,-166.39134,23.870576 |
| 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 French Frigate Shoals, Northwest Hawaiian Islands, USA |
