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LA County Bathymetry Data

The USGS developed a number of valuable bathymetric datasets off the coast of Los Angeles County in 1996 that we have loaded into our repository, and are made available here.  The datasets include:

  • Source backscatter data
  • 50 foot contours
  • Bathymetry data in DEM format
  • Hillshade
  • Bathymetric Relief

For more details please visit: https://walrus.wr.usgs.gov/pacmaps/la-index.html

Original Data can be accessed here: http://pubs.usgs.gov/of/2002/0162/intro.html#intro

Download the data

All of the data has been added to a File Geodatabase: USGS_BATHYMETRY (zipped file geodatabase)

Data Images

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Background

The Los Angeles, California Margin was mapped using multibeam echosounders during three separate surveys (Figure 1). In 1996, the USGS surveyed the shelf and slope in Santa Monica Bay from Pt. Dume to south of the Palos Verdes Peninsula. The mapping was accomplished using a Kongsberg Simrad EM1000 multibeam sonar system that provided high-quality bathymetry and quantitative backscatter. In 1998, the USGS continued the mapping to the south and surveyed the outer shelf, slope, and proximal basin off Long Beach and Newport using a Kongsberg Simrad EM300 multibeam sonar system. In 1999, the Los Angeles Margin mapping was completed with the surveying of the inner Long Beach shelf from the Palos Verdes Peninsula, south to Newport. This survey used a dual Kongsberg Simrad EM3000D multibeam sonar system.

These three surveys were conducted to support USGS projects studying marine pollution and geohazards along the Los Angeles Margin.

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Data Field Descriptions

See metadata


GIS Source Information
Database Name: eGIS_Elevation
Feature Class Name: USGS_BACKSCATTER, USGS_BATHYMETRY_CONTOURS_50FT, USGS_BATHYMETRY_DATA, USGS_BATHYMETRY_HILLSHADE, USGS_BATHYMETRY, RELIEF
Feature Dataset Name (if applicable):
Reference Date: 1996
Accuracy: Other
Update Frequency: Unknown
Access Constraints:None

Contact Information
Robert Rosenbauer
Center Director
US Geological Survey
Pacific Coastal and Marine Science Center
400 Natural Bridges Drive

Santa Cruz, CA 95060
brosenbauer@usgs.gov
(831) 460-7401

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