Bathymetry Hillshade: Offshore of Ventura, California, 2010

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Abstract/Contents

Abstract
This layer is a georeferenced raster image containing shaded relief (hillshade) data for the offshore area of Ventura, California. The map of the area was generated from data collected by California State University, Monterey Bay (CSUMB) and by the U.S. Geological Survey (USGS). Most of the offshore area was mapped by CSUMB in the summers of 2006 and 2007, using a 244-kHz Reson 8101 multibeam echosounder. The seafloor west of Ventura Harbor was mapped by the USGS in 2006 and 2010, using 117-kHz (2006) and 234.5-kHz (2010) SEA (AP) Ltd. SWATHplus-M phase-differencing sidescan sonars. These mapping missions combined to collect bathymetry from about the 10-m isobath to beyond the 3-nautical-mile limit of California's State Waters. The map that shows these data is published in Scientific Investigations Map 3254, "California State Waters Map Series--Offshore of Ventura, California." This layer os part of USGS Data Series 781.
Purpose
In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP) to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats and geology within the 3-nautical-mile limit of California's State Waters. CSMP has divided coastal California into 110 map blocks, each to be published individually as United States Geological Survey Open-File Reports (OFRs) or Scientific Investigations Maps (SIMs) at a scale of 1:24,000. Maps display seafloor morphology and character, identify potential marine benthic habitats and illustrate both the seafloor geology and shallow (to about 100 m) subsurface geology. Data layers for bathymetry, bathymetric contours, acoustic backscatter, seafloor character, potential benthic habitat and offshore geology were created for each map block, as well as regional-scale data layers for sediment thickness, depth to transition, transgressive contours, isopachs, predicted distributions of benthic macro-invertebrates and visual observations of benthic habitat from video cruises over the entire state. This coverage can be used to to aid in assessments and mitigation of geologic hazards in the coastal region and to provide sufficient geologic information for land-use and land-management decisions both onshore and offshore. These data are intended for science researchers, students, policy makers, and the general public. This information is not intended for navigational purposes.

Description

Type of resource cartographic, software, multimedia
Form Raster Dataset
Place Santa Cruz, California, US
Publisher Geological Survey (U.S.)
Date valid 2006 - 2010
Publication date 2013
Edition 1.0
Language English
Digital origin born digital
Map data Scale not given. ; Custom projection W 119°26ʹ54ʺ--W 119°14ʹ57ʺ/N 34°22ʹ48ʺ--N 34°12ʹ54ʺW 119°26ʹ54ʺ--W 119°14ʹ57ʺ/N 34°22ʹ48ʺ--N 34°12ʹ53ʺ, Scale not given ; EPSG::4326

Creators/Contributors

Creator Kvitek, Rikk G.
Creator Phillips, Eleyne L.
Creator Cochrane, Guy R.
Creator Dartnell, Peter
Creator Pacific Coastal and Marine Science Center
Creator Seafloor Mapping Lab
Creator Golden, Nadine E.

Subjects

Subject Coasts
Subject Digital elevation models
Subject Remote sensing
Subject Bathymetric maps
Subject Geomorphology
Subject Multibeam mapping
Subject Submarine topography
Subject Ocean bottom
Subject Seismic reflection method
Subject California
Subject Ventura County (Calif.)
Subject Pacific Ocean
Subject 2006-2010
Subject Imagery and Base Maps
Subject Oceans
Genre Geospatial data
Genre Cartographic dataset

Bibliographic information

Supplemental information Information for the related USGS Pacific Coastal and Marine Science Center data collection field activities is available online: Z-2-06-SC, at <http://walrus.wr.usgs.gov/infobank/z/z206sc/html/z-2-06-sc.meta.html>; S-W1-09-SC online at <http://walrus.wr.usgs.gov/infobank/s/sw109sc/html/s-w1-09-sc.meta.html
WGS84 Cartographics This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
Location https://purl.stanford.edu/mw297gy9345

Access conditions

Use and reproduction
This item is in the public domain. There are no restrictions on use.
Copyright
This work is in the Public Domain, meaning that it is not subject to copyright.

Preferred citation

U.S. Geological Survey. (2013). Bathymetry Hillshade: Offshore of Ventura, California, 2010. California State Waters Map Series Data Catalog: U.S. Geological Survey Data Series 781. Available at: http://purl.stanford.edu/mw297gy9345.

Collection

California State Waters Map Series Data Catalog

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