Home Archived April 8, 2019

Pacific Coastal and Marine Science Center


map of GLORIA sidescan sonar data areas
Above, map showing USGS GLORIA data in and adjacent to boundaries of U.S. Exclusive Economic Zones.

*Geological Long-Range Inclined Asdic

The U.S. EEZ (Exclusive Economic Zone) was declared by Presidential Order in 1983. This area includes the sea floor extending 200 nautical miles away from all U.S. possesions and trust territories. The area included is equal to two-thirds of all U.S. lands prior to the declaration. The U.S. Geological Survey was charged with surveying this new domain.

All of the GLORIA sidescan sonar data collected by the USGS from 1984 to 1991 are now available in full processed resolution (50 m) for the following areas:


Conterminous U.S.


Central Pacific

Report and data downloads

Paskevich, V.F., Wong, F.L., O'Malley, J.J., Stevenson, A.J., and Gutmacher, C.E., 2011, GLORIA sidescan-sonar imagery for parts of the U.S. Exclusive Economic Zone and adjacent areas: U.S. Geological Survey Open-File Report 2010-1332

Web viewer and map service

For legacy information, please see USGS Open-File Report 97-540


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U.S. Department of the Interior | U.S. Geological Survey
URL: https://walrus.wr.usgs.gov/gloria/
maintained by Laura Zink Torresan
last modified 2011 (lzt)