GAK_250M_LCC_WGS84.TIF - Gulf of Alaska U.S. EEZ GLORIA sidescan-sonar composite mosaic (LCC, 250 m, WGS84)
The Gulf of Alaska U.S. EEZ GLORIA digital sidescan-sonar mosaic covers about 806,000 square kilometers (sq km) of sea-floor. The mosaic shows the sea-floor morphology from Uminak Pass to Dixon Entrance, from the shelf break seaward to about 400 km. An additional 70-km-wide swath was imaged along the British Columbia margin to follow the trace of the Queen Charlotte Fault south of the Dixon Entrance. Major features visible on the mosaic include continental-margin deformation structures and submarine-channel systems. As in earlier EEZ reconnaissance surveys, the USGS utilized the GLORIA (Geological LOng-Range Inclined Asdic) sidescan-sonar system to complete the geologic mapping. The collected GLORIA data were processed and digitally mosaicked to produce continuous imagery of the sea-floor. A total of 30 digital mosaics with a 50-meter pixel resolution were assembled to complete the Gulf of Alaska overview mosaic.
Complete Metadata
| accessLevel | public |
|---|---|
| bureauCode |
[
"010:12"
]
|
| contactPoint |
{
"fn": "Valerie Paskevich",
"@type": "vcard:Contact",
"hasEmail": "mailto:whsc_data_contact@usgs.gov"
}
|
| description | The Gulf of Alaska U.S. EEZ GLORIA digital sidescan-sonar mosaic covers about 806,000 square kilometers (sq km) of sea-floor. The mosaic shows the sea-floor morphology from Uminak Pass to Dixon Entrance, from the shelf break seaward to about 400 km. An additional 70-km-wide swath was imaged along the British Columbia margin to follow the trace of the Queen Charlotte Fault south of the Dixon Entrance. Major features visible on the mosaic include continental-margin deformation structures and submarine-channel systems. As in earlier EEZ reconnaissance surveys, the USGS utilized the GLORIA (Geological LOng-Range Inclined Asdic) sidescan-sonar system to complete the geologic mapping. The collected GLORIA data were processed and digitally mosaicked to produce continuous imagery of the sea-floor. A total of 30 digital mosaics with a 50-meter pixel resolution were assembled to complete the Gulf of Alaska overview mosaic. |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "Original Metadata",
"format": "XML",
"mediaType": "text/xml",
"description": "The metadata original format",
"downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.881c8b04-be32-4ce8-aacd-63967d0e04c5.xml"
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|
| identifier | http://datainventory.doi.gov/id/dataset/USGS_881c8b04-be32-4ce8-aacd-63967d0e04c5 |
| keyword |
[
"250-meter",
"ACOUSTIC RECEIVERS",
"Abyssal/Submarine Fan",
"Alaska",
"Alaskan Abyssal Plain",
"Aleutian Abyssal Plain",
"Aleutian Trench",
"British Columbia Margin",
"CMGP",
"Chirikof Channel",
"Coastal and Marine Geology Program",
"Continental/Island Rise",
"Continental/Island Slope",
"EEZ",
"Exclusive Economic Zone",
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"GLORIA",
"GLORIA > Geological Long-Range Inclined ASDIC",
"GeoTIFF image",
"Geological LOng-Range Inclined Asdic",
"Gulf of Alaska",
"Gulf of Alaska Ecoregion",
"Infobank identifier F-1-86-GA",
"Infobank identifier F-6-89-GA",
"Infobank identifier F-7-89-EG",
"Infobank identifier F-8-88-AA",
"Infobank identifier F-9-88-WG",
"Kodiak-Bowie seamount chain",
"Lambert Conformal Conic",
"Marine Basin Floor",
"Marine Oceanic",
"North American Pacific Fijordland Ecoregion",
"Ocean > Pacific Ocean",
"Ocean > Pacific Ocean > North Pacific Ocean",
"Ocean > Pacific Ocean > North Pacific Ocean > Gulf Of Alaska",
"Oceans > Ocean Acoustics > Acoustic Reflectivity",
"Queen Charlotte Fault",
"SIDE-SCAN SONAR",
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"U.S. Geological Survey",
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"WCMG",
"Western Coastal and Marine Geology",
"Yakutat Margin",
"acoustic reflectivity",
"backscatter",
"composite mosaic",
"distributions",
"geoscientificInformation",
"grey scale image",
"image mosaics",
"imageryBaseMapsEarthCover",
"marine geology",
"marine geophysics",
"oceans",
"physical habitats and geomorphology",
"sea-floor acoustic reflectivity",
"sea-floor characteristics",
"seabed",
"sidescan sonar",
"sidescan-sonar mosaic"
]
|
| modified | 2021-11-11T00:00:00Z |
| publisher |
{
"name": "U.S. Geological Survey",
"@type": "org:Organization"
}
|
| spatial | -166.307494, 50.013922, -125.485934, 60.006665 |
| theme |
[
"Geospatial"
]
|
| title | GAK_250M_LCC_WGS84.TIF - Gulf of Alaska U.S. EEZ GLORIA sidescan-sonar composite mosaic (LCC, 250 m, WGS84) |
