Bathymetry Hillshade: Offshore of San Francisco, California, 2008

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Abstract/Contents

Abstract
This layer is a georeferenced raster image containing shaded relief (hillshade) data for the offshore area of San Francisco, California. The bathymetric and shaded relief maps of the area were generated from data collected by Fugro Pelagos and by California State University, Mapping was completed between 2004 and 2008, using a combination of 400-kHz Reson 7125 and 244-kHz Reson 8101 multibeam echosounders. These mapping missions combined to collect bathymetry (sheets 1, 2) from about the 10-m isobath to beyond the 3-nautical-mile limit of California's State Waters. A large portion of this map area was re-mapped in 2009, however the older bathymetry data were used in this map due to co-registered, acoustic backscatter data. A map that shows these data is published in Open-File Report 2015-1068, "California State Waters Map Series--Offshore of San Francisco, California." This layer is 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 2004 - 2008
Publication date 2014
Edition 1.0
Language English
Digital origin born digital
Map data Scale not given. ; Custom projection W 122°37ʹ4ʺ--W 122°24ʹ57ʺ/N 37°51ʹ26ʺ--N 37°41ʹ49ʺW 122°37ʹ4ʺ--W 122°24ʹ56ʺ/N 37°51ʹ26ʺ--N 37°41ʹ49ʺ, Scale not given ; EPSG::4326

Creators/Contributors

Creator Bretz, Carrie K.
Creator Dartnell, Peter
Creator Kvitek, Rikk G.
Creator Seafloor Mapping Lab
Creator Pacific Coastal and Marine Science Center
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 San Mateo County (Calif.)
Subject San Francisco (Calif.)
Subject Marin County (Calif.)
Subject Pacific Ocean
Subject San Francisco Bay (Calif.)
Subject 2004-2008
Subject Imagery and Base Maps
Subject Oceans
Subject Elevation
Genre Geospatial data
Genre Cartographic dataset

Bibliographic information

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/rc243mn3658

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

Dartnell, P., Kvitek, R.G., and Bretz, C.K. (2014). Bathymetry Hillshade: Offshore of San Francisco, California, 2008. California State Waters Map Series Data Catalog: U.S. Geological Survey Data Series 781. Available at: http://purl.stanford.edu/rc243mn3658.

Collection

California State Waters Map Series Data Catalog

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