Peter Dartnell David Finlayson James Conrad Guy Cochrane Samuel Johnson 2010 Raster Open-File Report 2009-1289 Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://pubs.usgs.gov/of/2009/1289/data.html https://pubs.usgs.gov/of/2009/1289/ https://doi.org/10.3133/ofr20091289 Peter Dartnell David Finlayson James Conrad Guy Cochrane Samuel Johnson 2010 1.0 Open-File Report 2009-1289 Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.3133/ofr20091289 https://pubs.usgs.gov/of/2009/1289/index.html Bathymetry data were collected by the U.S. Geological Survey in July 2008 in the northern Santa Barbara Channel in southern California. Data were collected aboard the R/V Parke Snavely, during USGS Field Activity S-9-08-SC, using a bathymetric sidescan system. These data are intended for science researchers, students, policy makers, and the general public. The data can be used with geographic information systems (GIS) or other software to display the bathymetry data. 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=S808SC Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 20080708 20080723 ground condition Complete None planned -120.5000000 -120.0000000 34.50000000 34.25000000 USGS Metadata Identifier USGS:c3cb419d-a370-422e-a7cc-fe0f46fe2ee4 ISO 19115 Topic Category elevation imageryBaseMapsEarthCover geoscientificInformation Data Categories for Marine Planning Bathymetry and Elevation USGS Thesaurus bathymetry bathymetry measurement sea-floor characteristics geospatial datasets marine geophysics multibeam sonar Marine Realms Information Bank (MRIB) keywords acoustic methods None water depth ocean floor topography 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 Refugio Beach El Capitan Beach Santa Barbara State of California 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 originator 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 http://pubs.usgs.gov/of/2009/1289/images/usgs2008_clrbathy.pdf Map showing shaded relief bathymetry, northern Santa Barbara Channel (16 Mb) PDF Not applicable for raster data. Unspecified Complete 0.5 meters 0.05 percent of the water depth. The bathymetry data were collected using 234.5 kHz SEA (AP) Ltd. SWATHplus-M phase-differencing sidescan sonar aboard the USGS R/V Parke Snavely. The survey vessel was equipped with a CodaOctopus F190 attitude and position system. This system combines Real Time Kinematic (RTK) Global Positioning System (GPS) data (2 centimeter error ellipse) with inertial motion measurements so that high-precision position and attitude corrections are fed in real-time to the sonar acquisition equipment. Up to 10 pings per second are transmitted with each ping consisting of 2048 samples per side (port and starboard). The returned samples are projected to the seafloor using a ray-tracing algorithm working with the previously measured sound velocity profiles. A series of statistical filters are applied to the raw samples that discriminate the seafloor returns from other unintended targets in the water column. Finally, the processed data are stored, line-by-line in processed trackline files. The individual soundings stored in the processed trackline files were combined into a 2-m resolution rasters in the Grid Processor software. The 2-m binned elevation values were exported from Grid Processor as an XYZ point cloud. The WGS84 (G1150) ellipsoidal coordinates of the survey were transformed into NAD83 (CORS96) ellipsoidal coordinates using a 7-parameter Helmert transformation available in the CS2CS program in the Proj.4 library (Version 442 for 32-bit Windows). The seven required parameters for the procedure were calculated using an Epoch date of 8 July 2008 according to procedure outlined in Soler and Snay (2004). Finally, the resulting NAD83 (CORS96) elevation postings were transformed into NAVD 1988 using the NOAA VDatum (Version 2.2.4) with the Geoid03 model. A script divided the 2-m binned point cloud into 2 x 2 km tiles. Each tile was gridded using Surfer (Version 9.2.397) and a linear Krigging algorithm and 0.20 cm nugget (the mean standard deviation of all 2-m cells in the survey). Finally, the 2-km tiles were mosaicked into a contiguous raster and converted to an Esri GRID. 2009 David Finlayson U.S. Geological Survey Operational Geologist mailing and physical address

2885 Mission Street

Santa Cruz CA 95060 USA (831) 427-4757 dfinlayson@usgs.gov Edits were made to bring the metadata up to current PCMSC standards including adding a doi# link, correcting typos, refining keywords, and using current access and distribution liability statements. Point of Contact and Metadata Contact information sections were changed to static PCMSC contact information. No data were changed. Users are advised to compare the metadata date of this file to any similar file to ensure they are using the most recent version. 20200131 Susan A Cochran U.S. Geological Survey, Pacific Coastal and Marine Science Center mailing and physical address

2885 Mission Street

Santa Cruz CA 95060 United States 831-460-7545 scochran@usgs.gov 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 Raster Grid Cell Universal Transverse Mercator 10 0.9996 -123.00000 0.00000 500000.0 0.00 coordinate pair 2.0 2.0 Meters NAD83 NAVD88 6378137.00 0.003352811 The bathymetry data was originally archived as an ESRI grid with the following attributes: >Cell size = 2.0 >Number of rows = 6001 >Number of columns = 11001 > >Data type = floating point > >Boundary >Xmin = 755999.0 >Xmax = 778001.0 >Ymin = 3807999.0 >Ymax = 3820001.0 > >Statistics >Minimum value = -146.38 >Maximum value = -5.17 >Mean = -61.75 >Standard deviation = 24.39 > >Coordinate system description >Projection UTM >Zone 10 >Datum NAD83 >Units meters These data are published in this report in three different formats with the following attributes, >BATHY.TIFF >Imageformat = TIFF >Image type = grayscale >Image colormap = false >Image compressed = false >Image rotate = false > >Image depth = 8 >Image bands = 1 >Number of columns = 6001 >Number of rows = 11001 >Pixel size DX = 2.0 >Pixel size DY = 2.0 > >Boundary >Xmin = 755999.0 >Xmax = 778001.0 >Ymin = 3807999.0 >Ymax = 3820001.0 > >BATHY.XYZ >XYZ file (x-coord, y-coord, depth) created from the ESRI grid using the command "GRIDPOINT". > >BATHY.ASC >ASCIIRASTER files created from the ESRI grid using the command "GRIDASCII". USGS U.S. Geological Survey mailing and physical address

345 Middlefield Rd MS-532

Menlo Park CA 94025-3561 USA (650) 329-4309 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. Esri grid format 9.1 Zip file contains the bathymetry data in xyz format Winzip, 7-zip, or Winrar are free software that will open .zip files 154 https://pubs.usgs.gov/of/2009/1289/data/bathyXYZ.zip https://pubs.usgs.gov/of/2009/1289/data.html https://doi.org/10.3133/ofr20091289 Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zipped file of bathymetry data. The second link points to a page with all the data in the report. The third link points to a landing page for the Open-File Report. GeoTIFF 9.1 Zip file contains the bathymetry data in GeoTiff format Winzip, 7-zip, or Winrar are free software that will open .zip files 8 https://pubs.usgs.gov/of/2009/1289/data/bathyTIFF.zip https://pubs.usgs.gov/of/2009/1289/data.html https://doi.org/10.3133/ofr20091289 Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zipped file of bathymetry data. The second link points to a page with all the data in the report. The third link points to a landing page for the Open-File Report. Raster data format 9.1 Zip file contains the bathymetry data in ASCIIRASTER format Winzip, 7-zip, or Winrar are free software that will open .zip files 98 https://pubs.usgs.gov/of/2009/1289/data/bathyASC.zip https://pubs.usgs.gov/of/2009/1289/data.html https://doi.org/10.3133/ofr20091289 Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zipped file of bathymetry data. The second link points to a page with all the data in the report. The third link points to a landing page for the Open-File Report. None 20201019 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