Peter Dartnell Jared W. Kluesner 20200625 GeoTIFF data release DOI:10.5066/P9W449LP Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P9W449LP Alicia F. Balster-Gee Jared W. Kluesner Daniel S. Brothers Peter Dartnell Alexis L. Wright Joel H. Edwards 2020 data release DOI:10.5066/P9W449LP Pacific Coastal and Marine Science Center, Santa Cruz, CA U.S. Geological Survey https://doi.org/10.5066/P9W449LP These metadata describe bathymetry data collected during an October 2016 multibeam-echosounder survey of the northern portion of the Santa Barbara Channel, California. Data were collected and processed by the the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) with fieldwork activity number 2016-666-FA. The bathymetry data are provided as a GeoTIFF image. Data were acquired to support USGS geologic hazards projects to aide hazard assessment within the Santa Barbara Basin. High-resolution multichannel minisparker seismic-reflection, multibeam-bathymetry, and acoustic backscatter data were collected to investigate the causes and consequences of submarine landslides in the Santa Barbara Basin. These data are intended for science researchers, students, policy makers, and the general public. These data can be used with geographic information systems or other software to identify bathymetric features. These data are not intended to be used for navigation. Additional information about the field activity from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2016-666-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in Esri format, this metadata file may include some Esri-specific terminology. 20160910 20161005 ground condition at time data were collected. Complete As needed -120.23 -119.85 34.42 34.32 USGS Metadata Identifier USGS:5ebedb3e82ce476925e5de5c ISO 19115 Topic Category geoscientificInformation elevation USGS Thesaurus bathymetry bathymetry measurement sea-floor characteristics geospatial datasets marine geophysics multibeam sonar Data Categories for Marine Planning Bathymetry and Elevation Marine Realms Information Bank (MRIB) keywords seabed field observation None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Pacific Coastal and Marine Science Center PCMSC Geographic Names Information System (GNIS) Santa Barbara Channel State of California Pacific Ocean Channel Islands State of California Isla Vista Gaviota City of Goleta City of Santa Barbara Coal Oil Point Point Conception None USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originators of the dataset and in products derived from these data. This information is not intended for navigation purposes. U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov https://www.sciencebase.gov/catalog/file/get/5ebedb3e82ce476925e5de5c?name=2016-666-FA_Bathymetry_Grid.png&allowOpen=true Location map of the bathymetry grid PNG Caris HIPS and SIPS (ver. 9) and ArcMap (ver. 10.3.1) on a Windows 7 computer. Not applicable for raster data. No formal logical accuracy tests were conducted Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. The USGS research vessel Parke Snavely was outfitted with an Applanix POS-MV position and motion compensation system. This system has post-processed horizontal positional accuracy of about 0.1 m and roll and pitch accuracies of about 0.02 degrees (https://www.applanix.com/downloads/products/specs/posmv/POS-MV-WaveMaster-II.pdf). Accuracies of final products may be lower due to water depth and total propagated uncertainties of the mapping systems, which include sonar system, position and motion compensation system, and navigation, as well as data processing that includes sounding cleaning, gridding, and datum transformations. The USGS research vessel Parke Snavely was outfitted with an Applanix POS-MV position and motion compensation system. This system has post-processed vertical accuracy of about 0.2 m (https://www.applanix.com/downloads/products/specs/posmv/POS-MV-WaveMaster-II.pdf). Accuracies of final products may be lower due to water depth and total propagated uncertainties of the mapping systems, which include sonar system, position and motion compensation system, and navigation, as well as data processing that includes sounding cleaning, gridding, and datum transformations. In 2016 the USGS research vessel Parke Snavely collected bathymetry data in the northern Santa Barbara Channel region, California using a Reson 7111 multibeam echosounder. Scientists at the USGS Pacific Coastal and Marine Science Center processed the bathymetry data post-cruise. The survey line files were imported into Caris HIPS and SIPS software (version 11) for processing. Post-processed Applanix POS-MV attitude data (SBET) were merged with each line file. Water column sound velocity data that was collected throughout the survey was applied to the bathymetry data. The data were cleaned of obvious bad soundings and the soundings were gridded into 5-m surface. The surface was exported as XYZ ASCII file (x-coordinate, y-coordinate, depth) in UTM, zone 10, WGS84 coordinates vertically referenced to the WGS84 ellipsoid. The XYZ files were transformed to UTM, zone 10, NAD83, NAVD88 values using the V-Datum software. The XYZ file was gridded into a new surface using Fledermaus software, exported as an ASCIIRaster file and imported into a Geographic Information System (GIS). The surface was then exported as a TIFF file in UTM zone 10, NAD83, NAVD88. 2018 Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. 20201019 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Performed minor edits to the metadata to correct typos. No data were changed. 20211013 U.S. Geological Survey Susan A. Cochran Geologist Mailing and Physical

2885 Mission Street

Santa Cruz CA 95060 831-460-7545 scochran@usgs.gov Raster Grid Cell 2676 6782 1 Universal Transverse Mercator 11 0.9996 -117.00000 0.00000 500000.0 0.00 coordinate pair 5.0 5.0 Meters D WGS 1984 WGS 1984 6378137.00 298.257223563 North America Vertical Datum 1988 0.1 meters Explicit elevation coordinate included with horizontal coordinates value elevation in meters relative to NAVD-88 Producer defined The complete 2016 5-m resolution grid "2016-666-FA_bathymetry_5m_WGS84_UTM11_NAVD88.tif" was originally archived as a TIFF image with the following attributes. >Cell size = 5.0 >Number of rows = 2676 >Number of columns = 6782 > >Data type = floating point > >Boundary >Xmin = 755639 >Xmax = 789549 >Ymin = 3800462 >Ymax = 3813842 > >Statistics >Minimum value = -549.7 >Maximum value = -74.5 >Mean = -318.1 >Standard deviation = 139.3 > >Coordinate system description >Projection UTM >Zone 11 >Datum D WGS 1984 >Vertical Reference WGS1984 >Units meter U.S. Geological Survey U.S. Geological Survey - ScienceBase Mailing and Physical

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 1-888-275-8747 sciencebase@usgs.gov These data are available in GeoTIFF format, including a tif world file (.tfw) and CSDGM FGDC-compliant metadata. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. GeoTIFF ArcMap (version 10.3.1) Downloadable zip file contains the TIFF (.tif) version of the bathymetry data and a projection file (.tfw). WinZip 31.94 https://www.sciencebase.gov/catalog/file/get/5ebedb3e82ce476925e5de5c https://www.sciencebase.gov/catalog/item/5ebedb3e82ce476925e5de5c https://doi.org/10.5066/P9W449LP Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download the zipped file of bathymetry geotiff, metadata, and a browse graphic. The second link points to a landing page with all of the files related to the backscatter data. The third link points to the landing page for the entire data release, including links to pages of the various data files. None. The downloadable data file has been compressed with the "zip" command and can be unzipped with Winzip (or other tool) on Windows systems. To utilize these data, the user must have software capable of uncompressing the WinZip file and importing and viewing a GeoTIFF file. 20211013 U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998