Metadata:
Identification_Information:
    Citation:
      Citation_Information:
        Originator: Nadine E. Golden
        Originator: Guy R. Cochrane
        Publication_Date: 2007
        Title:
          chancen_bath.txt - Bathymetric sidescan sonar data of Channel Central
          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/chancen_bath.jpg
      Browse_Graphic_File_Description:
        Image showing coverage of
        Channel Central bathymetry 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

    Cross_Reference:
      Citation_Information:
        Originator: U.S. Geological Survey, Coastal and Marine Geology Program
        Publication_Date: 2007
        Title: InfoBank
        Online_Linkage: http://walrus.wr.usgs.gov/infobank/s/s105sc/html/s-1-05-sc.meta.html
    Cross_Reference:
      Citation_Information:
        Originator: Guy Cochrane, U.S. Geological Survey, Coastal and Marine Geology Program
        Publication_Date: 200510
        Title:
          Sonar Survey of Sea-Floor Habitats
          Southeast of Santa Barbara, California
          in Sound Waves Monthly Newsletter,
          Coastal Science & Research News from Across the USGS
        Online_Linkage:
          http://soundwaves.usgs.gov/2005/10/fieldwork2.html


  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 2 meters.

    Lineage:
      Process_Step:
        Process_Description:
          Started with text files that were the output from A 234 kHz Interferometric Submetix
          Swath Bathy Sonar System.
        Process_Date: 20060702
      Process_Step:
        Process_Description:
          >Ran Python script, "Bathy Processor v1.5", designed to filter the bathymetry text file
          >
          >  ****Bathy_Proc (Python Script)****
          >  #!/usr/bin/python
          >  # Process bathymetry for P1-06-MB
          >  # Once this stabalizes, I will code into either a batch file or something more robust
          >  import os, glob, sys, time
          >
          >  # Configure Directories
          >  SCRIPT_DIR = "E:/subx_filters"
          >  TXT_DIR = "D:/S205SC/Bathy/TXT"
          >  GRID_DIR = "D:/S205SC/Bathy/asciigrids"
          >
          >  # Trackline Filtering Parameters
          >  MAX_SWATH_MULTIPLE = 4.0  # Trim depth samples > MAX * Water Depth (trims far-field noise)
          >  MIN_SWATH_MULTIPLE = 0.0  # Trim depth samples < MIN * Water Depth (trims nadir noise)
          >
          >  ROLL_BEAMS = 150          # Number of beams to average to eliminate roll artifacts
          >  NOISE_BEAMS = 300         # Number of beams to average to eliminate along-track noise
          >
          >  # Output Grid Parameters
          >  GRID_RESOLUTION = 1                  # Output grid resolution
          >  SEARCH_RADIUS = GRID_RESOLUTION + 5  # Search radius for samples while gridding
          >
          >  # Get the files for processing
          >  files = glob.glob("%s/*txt" % TXT_DIR)
          >
          >  # Get the total size of the input files to estimate processing progress
          >  bytes_total = sum([os.path.getsize(x) for x in files])
          >  bytes_sofar = 0
          >
          >  for i, file in enumerate(files):
          >      time_start = time.time()
          >      (indir, infile) = os.path.split(file)
          >      (basename, ext) = os.path.splitext(infile)
          >
          >      print
          >      print "-------------------------------------------------------------------------"
          >      print "Begin Processing line: %s (%d of %d)" % (basename, i+1, len(files))
          >      print
          >
          >      if not os.path.exists(basename[0:9]):
          >          print "Step 1 of 8: converting file to binary format..."
          >          outfile = basename + ".bin"
          >          os.system('python %s/seaconvert.py -bnxzad -o %s %s' % (SCRIPT_DIR, outfile, file))
          >
          >          print "Step 2 of 8: trimming beams..."
          >          infile = outfile
          >          outfile = basename + ".bin.flt"
          >          os.system('python -u %s/trim.py -d%f -n%f %s > %s' % (SCRIPT_DIR, MAX_SWATH_MULTIPLE, MIN_SWATH_MULTIPLE, infile, outfile))
          >          os.remove(infile)
          >
          >          print "Step 3 of 8: removing roll artifacts..."
          >          infile = outfile
          >          outfile = basename + ".bin.flt.roll"
          >          os.system('python -u %s/deroll.py %s %d > %s' % (SCRIPT_DIR, infile, ROLL_BEAMS, outfile))
          >          os.remove(infile)
          >
          >          print "Step 4 of 8: removing system noise..."
          >          infile = outfile
          >          outfile = basename + ".bin.flt.roll.noise"
          >          os.system('python -u %s/denoise.py %s %d > %s' % (SCRIPT_DIR, infile, NOISE_BEAMS, outfile))
          >          os.remove(infile)
          >
          >          print "Step 5 of 8: calculate spatial extent of line..."
          >          infile = outfile
          >          outfile = basename + ".region"
          >          os.system('gmtset D_FORMAT %.2f')
          >          os.system('gmtconvert %s -bi6 -F1,2 -bo > temp1' % infile)
          >          os.system('minmax -bi2 -I%d temp1 > %s' % (GRID_RESOLUTION, outfile))
          >          os.remove('temp1')
          >
          >          print "Step 6 of 8: gridding line..."
          >          Rfile = basename + ".region"
          >          infile = basename + ".bin.flt.roll.noise"
          >          outfile = basename + ".nc"
          >          region = open(Rfile).readline().strip()
          >          os.system('gmtconvert %s -bi6 -F1,2,3 -bo > temp1' % (infile))
          >          os.system('blockmean -I%d %s -C -bi3 -bo temp1 > temp2' % (GRID_RESOLUTION, region))
          >          os.remove('temp1')
          >          os.system('nearneighbor -G%s -I%d -bi3 -N4 -R -S%d temp2' % (outfile, GRID_RESOLUTION, SEARCH_RADIUS))
          >          os.remove('temp2')
          >          os.remove(infile)
          >          os.remove(Rfile)
          >
          >          print "Step 7 of 8: convert line to ESRI ASCII Grid format..."
          >          infile = basename + ".nc"
          >          outfile = GRID_DIR + "/" + basename + ".asc"
          >          os.system('grdmath %s 100 MUL RINT = temp.nc' % (infile))
          >          os.system('grd2xyz temp.nc -E > %s' % (outfile))
          >          os.remove('temp.nc')
          >          os.remove(infile)
          >
          >          print "Step 8 of 8: convert line to ESRI Raster format..."
          >          infile = GRID_DIR + "/" + basename + ".asc"
          >          outfile = GRID_DIR + "/" + basename
          >          #os.system('ascii2arc.py %s %s' % (infile, outfile))
          >          os.system("ascii_to_arcraster_project_pyramids.py %s %s" % (infile, outfile))
          >          os.remove(infile)
          >
          >      # Calculate Estimated time remaining
          >      time_stop = time.time()
          >      if time_stop == time_start:
          >          time_stop = time_start + 1
          >      bytes_file = os.path.getsize(file)
          >      bytes_sofar = bytes_sofar + bytes_file
          >      bytes_permin = float(bytes_file) / (time_stop - time_start) * 60.0
          >
          >      bytes_remaining = bytes_total - bytes_sofar
          >      time_remaining = bytes_remaining / bytes_permin
          >
          >      percent_complete = float(bytes_sofar) / float(bytes_total) * 100
          >
          >      # End this line
          >      print
          >      print "Line Completed.  Completed: %.0f%%, Est. Time Remaining: %.0f minutes" % (percent_complete, time_remaining)
          >      print "-------------------------------------------------------------------------"
          >      print
          >
        Process_Date: 20060722
      Process_Step:
        Process_Description:
          >Ran Python script, "ascii2arc", designed to convert ASCII grids to ESRI ArcGrid fromat
          >
          >  ****ascii2arc Script)****
          >  # ---------------------------------------------------------------------------
          >  # ascii_to_arcraster_project_pyramids.py
          >  # Created on: Mon Oct 02 2006 01:45:01 PM
          >  # Nadine Golden
          >  # Usage: ascii2arc.py <temp1_txt> <Output_raster>
          >  # ---------------------------------------------------------------------------
          >
          >  # 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.SetProduct("ArcInfo")
          >  gp.AddToolbox("E:/Mapping/ArcGIS/ArcToolbox/Toolboxes/Data Management Tools.tbx")
          >  gp.AddToolbox("E:/Mapping/ArcGIS/ArcToolbox/Toolboxes/Conversion Tools.tbx")
          >
          >  # Get script arguments...
          >  if len(sys.argv) < 3:
          >      print >> sys.stderr, "ascii_to_arcraster_project_pyramids.py: error1: not enough arguments"
          >      sys.exit(1)
          >
          >  # Convert ascii grid to arc grid
          >  ingrid = sys.argv[1]
          >  outgrid = sys.argv[2]
          >  (tail, head) = os.path.split(ingrid)
          >  (root, ext) = os.path.splitext(head)
          >
          >  if len(root) > 13:
          >      print >> sys.stderr, "ascii2arc.py: error 1: Grid name exceeds 13 characters: %s" % root
          >      sys.exit(1)
          >
          >  gp.Workspace = tail
          >  gp.ScratchWorkspace = tail
          >  #print "Workspace:", gp.Workspace
          >
          >  tmpgrid = tail + "/temp"
          >
          >  # Check to see if temp already exists and delete it if necessary
          >  if os.path.exists(tmpgrid):
          >      gp.Delete(tmpgrid)
          >  #print "ingrid1: %s outgrid1: %s" % (ingrid, tmpgrid)
          >  gp.ASCIIToRaster_conversion(ingrid, tmpgrid, "INTEGER")
          >
          >  # Process: Project Raster...
          >  ingrid = tmpgrid
          >  outgrid = tail + "/" + root
          >  if os.path.exists(outgrid):
          >      gp.Delete(outgrid)
          >  gp.ProjectRaster_management(ingrid, outgrid,
          >      "PROJCS['WGS_1984_UTM_Zone_10N',
          >          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',-123.0],
          >          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(outgrid)
          >
          >  # Clean up the mess
          >  if os.path.exists(tmpgrid):
          >      gp.Delete(tmpgrid)
          >
        Process_Date: 20060722
      Process_Step:
        Process_Description:
          In ArcGIS, imported lines output from "Bathy_Proc" according to track line number and mosaiced
          adjacent bathymetry lines using the "blend" option on the ArcGIS Raster "Merge" Tool.
        Process_Date: 20060810
      Process_Step:
        Process_Description:
          In ArcGIS, imported lines according to track line number and mosaiced adjacent bathymetry 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: 20060812
  Process_Step:
        Process_Description:
          Projected chancen_bath file available at http://pubs.usgs.gov/of/2007/1271/ from UTM, zone 10N, WGS84 coordinates to UTM, zone 11N, WGS84 coordinates and added a value of 3.6 m to the bathymetry data to account for a vertical offset.
        Process_Date: 2010


  Spatial_Data_Organization_Information:
    Direct_Spatial_Reference_Method: Raster
    Raster_Object_Information:
      Raster_Object_Type: Pixel
      Row_Count: 15638
      Column_Count: 7390

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