Metadata:
  Identification_Information:
    Citation:
      Citation_Information:
        Originator: Nadine E. Golden
        Originator: Guy R. Cochrane
        Publication_Date: 2010
        Title:
chanwest_back.txt - Bathymetric sidescan sonar backscatter image for Channel West in the Nearshore Benthic Habitat Mapping Project S. California map series.
        Edition: Version 2.0, 2010
        Geospatial_Data_Presentation_Form: map
        Larger_Work_Citation:
          Citation_Information:
            Originator: Guy R. Cochrane
            Originator: Nadine Golden
            Originator: Pete Dartnell
            Originator: Donna Schroeder
            Originator: Jamie Conrad
            Originator: Andy Stevenson
            Publication_Date: 2007
            Title: Seafloor Mapping and Benthic Habitat GIS for Southern California, Volume III
            Geospatial_Data_Presentation_Form: map
        Series_Information:
          Series_Name: Open-File Report
          Issue_Identification: 2007-1271
        Publication_Information:
          Publication_Place: Santa Cruz, CA
          Publisher: U.S. Geological Survey
        Online_Linkage: http://pubs.usgs.gov/of/2007/1271/

 Description:
    Abstract:
       Bathymetric sidescan sonar data of the nearshore seafloor (0 to 100 m water depths) of the Santa Barbara Channel area collected in 2005. A 234 kHz Interferometric Submetix Swath Bathy Sonar System; SEA Swath Processor, v. 2.05, SEA Grid Processor v. 2.05, was used for geophysical surveying. The 2005 survey was navigated with a CodaOctopus, Model F180, Differential Global Positioning System (DGPS). A KVH Industries Inc. azimuth digital gyro-compass provided ship headings with 0.5 degree accuracy. Navigation data were recorded using Yo-Nav version 1.19 (Gann, 1992). This is one of a collection of digital files of a geographic information system of spatially referenced data related to the USGS Coastal and Marine Geology Program Nearshore Benthic Habitat Mapping Project.  See <http://walrus.wr.usgs.gov/nearshorehab> for more information.

 Purpose:
        These data are intended for science researchers, students, policy
        makers, and the general public.  The data can be
        used with geographic information systems (GIS) software
        to display geologic and oceanographic information.

      Supplemental_Information:
        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 ArcInfo format, this metadata file may include some
        ArcInfo-specific terminology.

    Time_Period_of_Content:
      Time_Period_Information:
        Range_of_Dates/Times:
          Beginning_Date: 20050808
          Ending_Date: 20050827
      Currentness_Reference: ground condition

    Status:
      Progress: Complete
      Maintenance_and_Update_Frequency: As needed

    Spatial_Domain:
      Bounding_Coordinates:
        West_Bounding_Coordinate: -119.643628
        East_Bounding_Coordinate: -119.471725
        North_Bounding_Coordinate: 34.390598
        South_Bounding_Coordinate: 34.320467

    Keywords:
      Theme:
        Theme_Keyword_Thesaurus: None
        Theme_Keyword: bathymetry
        Theme_Keyword: sidescan sonar
        Theme_Keyword: remote-sensing
        Theme_Keyword: MIPS
        Theme_Keyword: U.S. Geological Survey
        Theme_Keyword: USGS
        Theme_Keyword: Coastal and Marine Geology Program
        Theme_Keyword: CMGP
      Theme:
        Theme_Keyword_Thesaurus: ISO 19115 Topic Category
        Theme_Keyword: geoscientificinformation
        Theme_Keyword: imagereyBaseMapsEarthCover
        Theme_Keyword: oceans
        Theme_Keyword: elevation
      Place:
        Place_Keyword_Thesaurus: None
        Place_Keyword: Channel Islands National Marine Sanctuary
      Place:
        Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
        Place_Keyword: Santa Barbara
        Place_Keyword: Ventura
        Place_Keyword: Santa Barbara Channel
        Place_Keyword: Channel Islands
        Place_Keyword: California



    Access_Constraints: None

    Use_Constraints:
      Public domain data from the U.S. government is freely redistributable
      with proper metadata and source attribution.
      Please recognize the U.S. Geological Survey (USGS)
      as the source of this information.

    Point_of_Contact:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: Guy R. Cochrane
          Contact_Organization: U.S. Geological Survey, Coastal and Marine Geology
        Contact_Position: Geophysicist
        Contact_Address:
          Address_Type: mailing and physical address
          Address: USGS Pacific Science Center, 400 Natural Bridges Drive
          City: Santa Cruz
          State_or_Province: CA
          Postal_Code: 95060-5792
          Country: USA
        Contact_Voice_Telephone: (831) 427-4754
        Contact_Facsimile_Telephone: (831) 427-4748
        Contact_Electronic_Mail_Address: gcochrane@usgs.gov

    Browse_Graphic:
      Browse_Graphic_File_Name: images/chanwest_back.jpg
      Browse_Graphic_File_Description:
        Image showing coverage of
        Channel West backscatter data ArcInfo format.
      Browse_Graphic_File_Type: JPEG


    Native_Data_Set_Environment:
      SunOS, 5.7, sun4u UNIX
      Windows XP Professional, v. 2002, service pack 2
      SEA Grid Processor v. 2.051
      ArcGIS version 9.1


  Data_Quality_Information:

    Logical_Consistency_Report: Logical Consistency untested.

    Completeness_Report:
      Please see the Methods section of http://pubs.usgs.gov/of/2007/1271/ for
      information about omissions, selection criteria, generalization,
      definitions used, and other rules used to derive the data set.

    Positional_Accuracy:
      Horizontal_Positional_Accuracy:
        Horizontal_Positional_Accuracy_Report: On the order of 10 meters.

    Lineage:
      Process_Step:
        Process_Description:
          Started with SXP files that were the output from A 468 kHz Interferometric Submetix
          Swath Bathy Sonar System. Based on the Julian date at original data collection,
          individually imported each raw backscatter file into "SEA Swath Processor Real-Time Software System."
          Configured the way the data was processed in "SEA Swath Processor" by inputting adjustment and offset information,         such as ship's motion, tides, velocity of sound, and relative sensor positions.
        Process_Date: 20060702
      Process_Step:
        Process_Description:
          Used the "SonarWiz.MAP Sonar File Manager" tool: check and correct the navigation data.
          Manually "bottom-tracked" each line.
          Applied signal processing functions by setting the Automatic Gain Control (AGC), Beam Angle Correction (BAC),
          project sonar data using sensor headings.
          Individually exported the line as a GeoTif file.
        Process_Date: 200060705
      Process_Step:
        Process_Description:
          Looped through the directory of GeoTif files and convert GeoTif to ArcGIS raster format.
          Removed "NoData" raster cells using the ArcGIS Con statement; and projected the data to WGS 1984 UTM Zone 11.
          >
          >  **** Ascii to ArcRaster & Project Pyramids (Python Script)****
          >  # ---------------------------------------------------------------------------
          >  # ascii_to_arcraster_project_pyramids_stand_alone.py
          >          # Created on: Tuesday Oct 04 2006
          >  # Nadine Golden
          >  # ---------------------------------------------------------------------------
          >
          >  # Import system modules
          >  import glob, sys, string, os, win32com.client
          >
          >  # Create the Geoprocessor object
          >  gp = win32com.client.Dispatch("esriGeoprocessing.GpDispatch.1")
          >
          >  # Load required toolboxes...
          >  gp.AddToolbox("E:/ArcGIS/ArcToolbox/Toolboxes/Data Management Tools.tbx")
          >  gp.AddToolbox("E:/ArcGIS/ArcToolbox/Toolboxes/Conversion Tools.tbx")
          >
          >  files = glob.glob("F:/test/grids/*asc")
          >  for file in files:
          >      (basename, ext) = os.path.splitext(file)
          >      ingrid = file
          >      outgrid = basename + "tmp"
          >      os.system("scii_to_arcraster_project_pyramids_stand_alone.py %s %s" % (ingrid, outgrid))
          >
          >      # Process: ASCII to Raster...
          >      gp.ASCIIToRaster_conversion(ingrid, outgrid, "INTEGER")
          >
          >  ##    # Process: Define Projection...
          >  ##    gp.DefineProjection_management(outgrid,                                                                     "PROJCS['NAD_1983_UTM_Zone_11N',GEOGCS['GCS_North_American_1983',DATUM['D_North_American_1983',
          >            SPHEROID['GRS_1980',6378137.0,298.257222101]],
          >            PRIMEM['Greenwich',0.0],
          >            UNIT['Degree',0.0174532925199433]],
          >            PROJECTION['Transverse_Mercator'],
          >            PARAMETER['False_Easting',500000.0],
          >            PARAMETER['False_Northing',0.0],
          >            PARAMETER['Central_Meridian',-117.0],
          >            PARAMETER['Scale_Factor',0.9996],
          >            PARAMETER['Latitude_Of_Origin',0.0],
          >            UNIT['Meter',1.0]]")
          >
          >      # Process: Project Raster...
          >      finalgrid = basename
          >      gp.ProjectRaster_management(outgrid, finalgrid,                 "PROJCS['WGS_1984_UTM_Zone_11N',GEOGCS['GCS_WGS_1984',DATUM['D_WGS_1984',
          >          SPHEROID['WGS_1984',6378137.0,298.257223563]],
          >          PRIMEM['Greenwich',0.0],
          >          UNIT['Degree',0.0174532925199433]],
          >          PROJECTION['Transverse_Mercator'],
          >          PARAMETER['False_Easting',500000.0],
          >          PARAMETER['False_Northing',0.0],
          >          PARAMETER['Central_Meridian',-117.0],
          >          PARAMETER['Scale_Factor',0.9996],
          >          PARAMETER['Latitude_Of_Origin',0.0],
          >          UNIT['Meter',1.0]];
          >          -10000 -10000 100000;0 100000;0 100000", "NEAREST", "1")
          >
          >      # Process: Build Pyramids...
          >      gp.BuildPyramids_management(finalgrid)
          >
          >      # Clean up the mess
          >      gp.Delete(outgrid)
        Process_Date: 200060705
      Process_Step:
        Process_Description:
          Looped through the directory arcgrids and normalized the backscatter values using the Python script "RasterStats.py."
          >
          >  **** Rasters Statistics for Normalizing Data (Python Script)****
          >  # ---------------------------------------------------------------------------
          >  # RasterStats.py
          >  # To Calculate the mean value of a raster
          >  # Created on: Thursday Oct 20, 2006
          >  # Nadine Golden
          >  # ---------------------------------------------------------------------------
          >
          >  # Import system modules
          >  import sys, string, os, win32com.client
          >
          >  # Create the Geoprocessor object
          >  gp = win32com.client.Dispatch("esriGeoprocessing.GpDispatch.1")
          >
          >  # Check out any necessary licenses
          >  gp.CheckOutExtension("spatial")
          >
          >  # Load required toolboxes...
          >  gp.AddToolbox("E:/ArcGIS/ArcToolbox/Toolboxes/Spatial Analyst Tools.tbx")
          >  gp.AddToolbox("E:/ArcGIS/RasterStatsTool/RasterStatistics.tbx")
          >
          >  #Directory of grids
          >  gp.Workspace = "F:\\test"
          >  rasterlist = gp.ListRasters()
          >  name = rasterlist.Next()
          >  while name:
          >      print name
          >
          >      # Process: RasterBand Statistics...
          >      mean = gp.RasterBandStatistics(name, "MEAN")
          >
          >      print mean
          >
          >      # Process: Minus...
          >      (indir,basename) = os.path.split(name)
          >      outgrid = os.path.join("F:\\test\\Normalized", basename)
          >      gp.Minus_sa(name, mean, outgrid)
          >
          >      print outgrid
          >
          >      name = rasterlist.Next()
        Process_Date: 200060715
      Process_Step:
        Process_Description:
          In ArcGIS, imported lines according to track line number and mosaiced adjacent backscatter lines.
          Mosaicing was done by manually drawing a mask around the best possible data for each line and
          it's overlapping lines. Best possible data was determined subjectively and included the least
          no data values as possible in the overlapping areas.
        Process_Date: 20060722
 Process_Step:
        Process_Description:
          Projected chanwest_back file available at http://pubs.usgs.gov/of/2007/1271/ from UTM, zone 10N, WGS84 coordinates to UTM, zone 11N, WGS84 coordinates.
        Process_Date: 2010

  Spatial_Data_Organization_Information:
    Direct_Spatial_Reference_Method: Raster
    Raster_Object_Information:
      Raster_Object_Type: Pixel
      Row_Count: 7308
      Column_Count: 7325

Spatial_Reference_Information:
    Horizontal_Coordinate_System_Definition:
      Planar:
        Map_Projection:
          Map_Projection_Name: WGS_1984_UTM_Zone_11N
          Polar_Stereographic:
            Straight-Vertical_Longitude_from_Pole: -117
            Standard_Parallel: 0.999600
            False_Easting: 500000.000
            False_Northing: 0.000
        Planar_Coordinate_Information:
          Planar_Coordinate_Encoding_Method: coordinate pair


  Distribution_Information:
    Distributor:
      Contact_Information:
        Contact_Organization_Primary:
          Contact_Organization: U.S. Geological Survey, Coastal and Marine Geology
          Contact_Person: Guy R. Cochrane
        Contact_Position: Geophysicist
        Contact_Address:
          Address_Type: mailing and physical address
          Address: USGS Pacific Science Center, 400 Natural Bridges Drive
          City: Santa Cruz
          State_or_Province: CA
          Postal_Code: 95060-5792
          Country: USA
        Contact_Voice_Telephone: (831) 427-4754
        Contact_Facsimile_Telephone: (831) 427-4748
        Contact_Electronic_Mail_Address: gcochrane@usgs.gov

    Distribution_Liability:
      Although this data set has been used by the USGS,
      no warranty, expressed or implied, is made by the USGS
      as to the accuracy of the data and/or related materials.
      The act of distribution shall not constitute any such warranty,
      and no responsibility is assumed by the USGS
      in the use of these data or related materials.

      Any use of trade, product, or firm names is
      for descriptive purposes only and does not imply
      endorsement by the U.S. Government.

 Metadata_Reference_Information:
    Metadata_Date: 2010
    Metadata_Contact:
      Contact_Information:
        Contact_Organization_Primary:
          Contact_Organization: U.S. Geological Survey, Coastal and Marine Geology
          Contact_Person: Peter Dartnell
        Contact_Position: Physical Scientist
        Contact_Address:
          Address_Type: mailing and physical address
          Address: USGS 345 Middlefield Rd
          City: Menlo Park
          State_or_Province: CA
          Postal_Code: 94025
          Country: USA
        Contact_Voice_Telephone: (650)329-5460
        Contact_Electronic_Mail_Address: pdartnell@usgs.gov

    Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
    Metadata_Standard_Version: FGDC-STD-001-1998