5-Meter Shaded Relief Multibeam Bathymetry Image (Grayscale): Portuguese Ledge, Monterey Bay, California, 2008

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Abstract/Contents

Abstract: This raster dataset is a 5-meter resolution grayscale GeoTIFF image containing multibeam bathymetry data for the Portuguese Ledge region of Monterey Bay, California. The surveys for Portuguese Ledge were conducted on June 14 & 16, 2008. This layer was created as part of the California Seafloor Mapping Project.
Purpose: Marine data offered here represent the efforts of a comprehensive state waters mapping program for California launched by the California State Coastal Conservancy, Ocean Protection Council, Department of Fish and Game, and the NOAA National Marine Sanctuary Program. The ultimate goal is the creation of a high-resolution 1:24,000 scale geologic and habitat base map series covering all of California's 14,500 km2 state waters out to the 3 mile limit, and support of the state's Marine Life Protection Act Initiative (MLPA) goal to create a statewide network of Marine Protected Areas (MPAs). This statewide project requires, involves and leverages expertise from industry, resource management agencies and academia. The tiered mapping campaign involves the use of state-of-the-art sonar, LIDAR (aerial laser) and video seafloor mapping technologies; computer aided classification and visualization; expert geologic and habitat interpretations codified into strip maps spanning California's land/sea boundary; and the creation of an online, publicly accessible data repository for the dissemination of all mapping products.

Type of resource	cartographic, software, multimedia
Form	GeoTIFF
Place	Seaside, California, US
Publisher	Seafloor Mapping Lab
Date valid	2008
Publication date	2010
Language	English
Digital origin	born digital
Map data	Scale not given. ; EPSG::26910 W 122°1ʹ55ʺ--W 121°55ʹ18ʺ/N 36°43ʹ36ʺ--N 36°40ʹ25ʺW 122°1ʹ55ʺ--W 121°55ʹ17ʺ/N 36°43ʹ36ʺ--N 36°40ʹ25ʺ, Scale not given ; EPSG::4326

Creator	Seafloor Mapping Lab

Supplemental information	MBES and side scan data for the South Monterey Bay region were acquired using a 200 KHz/ 400 KHz Reson 7125 sonar aboard the R/V VenTresca by the Seafloor Mapping Lab at California State University Monterey Bay. Prior to data collection, a series of planned survey lines were created using the survey navigation and planning software Hypack 2008 from Hypack, Inc. An Applanix POS/MV 320 v4 system was used to provide position and attitude data during data collection and accounted for vessel motion such as heave, pitch, and roll (position accuracy ± 2m, pitch, roll and heading accuracy ±0.02°, heave accuracy ± 5% or 5cm) with input from a Cnav® enabled NAVCON 2050 GPS. KGPS altitude data were used to account for tide cycle fluctuations and sound velocity profiles were collected with an Applied Microsystems SVPlus sound velocimeter. Data acquisition, post-processing, and final products derived from multibeam bathymetry data were handled by the Seafloor Mapping Lab at CSUMB.
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/sk620xk5169

Use and reproduction: These data are licensed by Stanford Libraries and are available to Stanford University affiliates only. Affiliates are limited to current faculty, staff and students. Non affiliates seeking access should contact the publisher directly. These data may not be reproduced or used for any purpose without permission.
Copyright: Copyright ownership resides with the originator.

Preferred citation: Seafloor Mapping Lab. (2010) 5-Meter Shaded Relief Multibeam Bathymetry Image (Grayscale): Portuguese Ledge, Monterey Bay, California, 2008. Seafloor Mapping Lab. Available at: http://purl.stanford.edu/sk620xk5169

California Seafloor Mapping Project

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