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.

Data and Resources

Field Value
accessLevel public
bureauCode {010:12}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier USGS:881c8b04-be32-4ce8-aacd-63967d0e04c5
metadata_type geospatial
modified 20211111
old-spatial -166.307494, 50.013922, -125.485934, 60.006665
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash 08083c78e39d9bd0cbda7d6cbfe781ab7fd2624f
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-166.307494, 50.013922], [-166.307494, 60.006665], [ -125.485934, 60.006665], [ -125.485934, 50.013922], [-166.307494, 50.013922]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • 250-meter
  • abyssal-submarine-fan
  • acoustic-receivers
  • acoustic-reflectivity
  • alaska
  • alaskan-abyssal-plain
  • aleutian-abyssal-plain
  • aleutian-trench
  • amerigeo
  • amerigeoss
  • backscatter
  • british-columbia-margin
  • chirikof-channel
  • ckan
  • cmgp
  • coastal-and-marine-geology-program
  • composite-mosaic
  • continental-island-rise
  • continental-island-slope
  • distributions
  • eez
  • exclusive-economic-zone
  • exclusive-economic-zone-eez
  • geo
  • geological-long-range-inclined-asdic
  • geoscientificinformation
  • geoss
  • geotiff-image
  • gloria
  • gloria-gt-geological-long-range-inclined-asdic
  • grey-scale-image
  • gulf-of-alaska
  • gulf-of-alaska-ecoregion
  • image-mosaics
  • imagerybasemapsearthcover
  • 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-geology
  • marine-geophysics
  • marine-oceanic
  • national
  • north-america
  • north-american-pacific-fijordland-ecoregion
  • ocean-gt-pacific-ocean
  • ocean-gt-pacific-ocean-gt-north-pacific-ocean
  • ocean-gt-pacific-ocean-gt-north-pacific-ocean-gt-gulf-of-alaska
  • oceans
  • oceans-gt-ocean-acoustics-gt-acoustic-reflectivity
  • physical-habitats-and-geomorphology
  • queen-charlotte-fault
  • sea-floor-acoustic-reflectivity
  • sea-floor-characteristics
  • seabed
  • side-scan-sonar
  • sidescan-sonar
  • sidescan-sonar-mosaic
  • surveyor-channel
  • tectonic-trench
  • u-s-geological-survey
  • united-states
  • usgs
  • usgs-881c8b04-be32-4ce8-aacd-63967d0e04c5
  • wcmg
  • western-coastal-and-marine-geology
  • yakutat-margin
isopen False
license_id notspecified
license_title License not specified
maintainer Valerie Paskevich
maintainer_email whsc_data_contact@usgs.gov
metadata_created 2025-11-20T06:20:28.673376
metadata_modified 2025-11-20T06:20:28.673380
notes 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.
num_resources 1
num_tags 71
title GAK_250M_LCC_WGS84.TIF - Gulf of Alaska U.S. EEZ GLORIA sidescan-sonar composite mosaic (LCC, 250 m, WGS84)