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JI_250M_LCC_WGS84.TIF - Johnston Atoll U.S. EEZ GLORIA sidescan-sonar composite mosaic (LCC, 250 m, WGS84)

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: July 16, 2025 | Last Modified: 20211111
In 1984, the U.S. Geological Survey (USGS), Office of Marine Geology, launched a program using the Geological LOng-Range Inclined Asdic (GLORIA) sidescan-sonar system to study the entire U.S. Exclusive Economic Zone (EEZ). From December 1990 through February 1991, the USGS and IOS (Institute of Oceanographic Sciences, U.K.) scientists conducted three surveys within the Johnston Atoll U.S. EEZ surrounding Johnston Island. The surveys during that time period, and conducted in succession from 6 December 1990 to 21 February 1991, focused on the U.S. Exclusive Economic Zone surrounding the Johnston Atoll. The results of these surveys were 16 digital mosaics of approximately a 2 degree by 2 degree area with a 50-meter pixel resolution.

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ACOUSTIC RECEIVERS Akau Island CMGP Central Pacific Ocean Coastal and Marine Geology Program EEZ Exclusive Economic Zone Exclusive Economic Zone (EEZ) GLORIA GLORIA > Geological Long-Range Inclined ASDIC GeoTIFF image Geological LOng-Range Inclined Asdic Hawaii Ecoregion Hikina Island Johnston Atoll EEZ Johnston Atoll Exclusive Economic Zone Johnston Island Marine Basin Floor Marine Oceanic Ocean > Pacific Ocean Ocean > Pacific Ocean > Central Pacific Ocean Oceans > Ocean Acoustics > Acoustic Reflectivity SIDE-SCAN SONAR Sand Island U.S. Geological Survey USGS USGS:c9010756-a57a-40f3-9ea1-53fa3554600b WCMG Western Coastal and Marine Geology acoustic reflectivity backscatter distributions field activity number F-1-91-CP field activity number F-13-90-CP field activity number F-2-91-CP 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

Complete Metadata

@id http://datainventory.doi.gov/id/dataset/6ba2bdfe3ecedabd7450e08854b1406e
bureauCode 
[
  "010:12"
]
identifier USGS:c9010756-a57a-40f3-9ea1-53fa3554600b
spatial -173.239755,12.914067,-164.701869,21.081851
theme 
[
  "geospatial"
]

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