The mapping of bathymetry (or depth to the sea floor) provides base maps for USGS studies as well as for other federal, state and local agencies. Mapping the bathymetry of the coast and shallow portion of the U.S. is important because these areas are used for recreation, transportation, and waste disposal; contain most of the currently harvested fisheries resources; provide habitat for juvenile and endangered species; are valued for their aesthetics; and are most affected by human activities.Other related USGS websites: National Mapping Information
Description: Images of the sea floor off the coasts of California, Hawaii, Gulf of Mexico, and Lake Tahoe. Backscatter and swath bathymetry, regular and in 3-D! updated: 2003-10-29 pages include:
Description: Studies of sediment transport in the Grand Canyon, Arizona - using ocean research techniques to study a river system. updated: 1997-06-09 pages include:
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