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Seafloor mapping and benthic habitat GIS for southern California, volume III

Open-File Report 2007-1271

By:
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Abstract

From August 8-27, 2005, more than 75 km of the continental shelf (Fig. 1) in water depths of 20-70m southeast of Santa Barbara, were surveyed during the USGS cruise S-1-05-SC (http://walrus.wr.usgs.gov/infobank/s/s105sc/html/s-1-05-sc.meta.html). Both Interferometric sonar and 14 hours of both vertical and oblique georeferenced submarine digital video were collected to (1) obtain geophysical data (bathymetry and acoustic reflectance), (2) examine and record geologic characteristics of the sea floor, and (3) construct maps of seafloor geomorphology and habitat distribution. Substrate distribution is predicted using a modified version of Cochrane and Lafferty (2002) video-supervised statistical classification of sonar data that includes derivatives of bathymetry data. Specific details of the methods can be found in the meatadata of the bathymetry data file. Substrates observed are predominantly sand with some rock. Rocky substrates were restricted primarily to an east-west trending bathymetric high 2,000 m north of oil platforms.


This is an updated report (version 2.0) from the earlier 2007-1271 (version 1.0) open-file report. This updated report re-releases the data files in UTM, zone 11, WGS84 coordinates. Also, the bathymetry data has been corrected for a vertical offset discovered in the earlier 2007-1271 (version 1.0) report.

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Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Seafloor mapping and benthic habitat GIS for southern California, volume III
Series title:
Open-File Report
Series number:
2007-1271
Edition:
Version 2.0
Year Published:
2007
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Contributing office(s):
Coastal and Marine Geology Program
Description:
HTML Document
Time Range Start:
2005-08-08
Time Range End:
2005-08-27
Country:
United States
State:
California
Online Only (Y/N):
Y
Additional Online Files(Y/N):
Y