Backscatter A (8101): Offshore of Point Reyes, California, 2010

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Abstract/Contents

Abstract
This layer is a georeferenced raster image containing acoustic-backscatter data for the offshore region of Point Reyes, California. The map that show these data are published in Open-File Report 2015-1114, "California State Waters Map Series—Offshore of Point Reyes, 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.The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information.

Description

Type of resource cartographic, software, multimedia
Form Raster Dataset
Place Santa Cruz, California, US
Publisher Geological Survey (U.S.)
Date valid 2007 - 2010
Publication date 2014
Language English
Digital origin born digital
Map data Scale not given. ; Custom projection W 123°5ʹ24ʺ--W 122°53ʹ24ʺ/N 38°6ʹ--N 37°56ʹ24ʺW 123°5ʹ41ʺ--W 122°53ʹ33ʺ/N 38°5ʹ54ʺ--N 37°56ʹ19ʺ, Scale not given ; EPSG::4326

Creators/Contributors

Creator Erdey, Mercedes D.
Creator Kvitek, Rikk G.
Creator Dartnell, Peter
Creator Pacific Coastal and Marine Science Center
Creator Golden, Nadine E.

Subjects

Subject Coasts
Subject Submarine topography
Subject Submarine geology
Subject Ocean bottom
Subject Seismic reflection method
Subject California
Subject Marin County (Calif.)
Subject Drakes Bay (Calif.)
Subject Pacific Ocean
Subject 2007-2010
Subject Imagery and Base Maps
Subject Oceans
Subject Environment
Subject Geoscientific Information
Genre Geospatial data
Genre Cartographic dataset

Bibliographic information

Supplemental information None
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/ys639zk8349

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. and Kvitek, R.G. (2014). Backscatter A (8101): Offshore of Point Reyes, California, 2010. California State Waters Map Series Data Catalog: U.S. Geological Survey Data Series 781. Available at: http://purl.stanford.edu/ys639zk8349.

Collection

California State Waters Map Series Data Catalog

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