GAK_Q50.TIF - Gulf of Alaska U.S. EEZ GLORIA sidescan-sonar data mosaic (20 of 30) (LCC, 50 m, WGS84)

• Main Author: U.S. Geological Survey
• Format: Dataset
• Language: unknown
• Published: USGS Science Data Catalog 2011
• Subjects: U.S. Geological Survey; USGS; Coastal and Marine Geology Program; CMGP; Western Coastal and Marine Geology; WCMG; Geological LOng-Range Inclined Asdic; GLORIA; GeoTIFF image; grey scale image; backscatter; acoustic reflectivity; marine geology; sidescan-sonar mosaic; Exclusive Economic Zone; EEZ; Infobank identifier F-8-88-AA; Infobank identifier F-1-86-GA; Infobank identifier F-6-89-GA; Infobank identifier F-7-89-EG; Infobank identifier F-9-88-WG; oceans; geoscientificInformation; imageryBaseMapsEarthCover; Oceans > Ocean Acoustics > Acoustic Reflectivity; ACOUSTIC RECEIVERS; GLORIA > Geological Long-Range Inclined ASDIC; SIDE-SCAN SONAR; distributions; physical habitats and geomorphology; seabed; Exclusive Economic Zone (EEZ); sidescan sonar; marine geophysics; image mosaics; sea-floor characteristics; sea-floor acoustic reflectivity; Alaska; Gulf of Alaska; Aleutian Trench; Aleutian Abyssal Plain; Surveyor Channel; Chirikof Channel; Kodiak-Bowie seamount chain; Alaskan Abyssal Plain; Yakutat Margin; British Columbia Margin; Queen Charlotte Fault; Ocean > Pacific Ocean; Ocean > Pacific Ocean > North Pacific Ocean; Ocean > Pacific Ocean > North Pacific Ocean > Gulf Of Alaska; Bowie Seamount; Pacific; Queen Charlotte; Kodiak; Yakutat
• Online Access: https://search.dataone.org/view/4f646ed8-6bd6-4d1e-8f20-e4ce38b5e43b

GLORIA data for the Gulf of Alaska Exclusive Economic Zone (EEZ) were acquired during five cruises over a four year period. The first cruise conducted in 1986 (F-1-86-GA) surveyed an area of the north-central mosaic area and covered an area of approximately 40,000 square kilometers (sq km). The second two cruises (F-8-88-AA, F-9-88-WG) were conducted in 1988. One of the 1988 cruises (F-8-88-AA) focused on a survey of the Aleutian Arc. The eastern most portion of that survey extended outside of the Aleutian Arc survey area and covered an area of approximately 52,000 square kilometers (sq km) of seafloor on the western edge of the Gulf of Alaska. The final two cruises (F-6-89-GA, F-7-89-EG) were completed in 1989. 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 seafloor. Thirty digital mosaics with a 50-meter pixel resolution were completed for the region.