Identification_Information:
  Citation:
    Citation_Information:
      Originator: Seth Ackerman
      Publication_Date: 2006
      Title: multibeambathybnds: Multibeam Bathymetry Boundaries from Boston Harbor and Approaches
      Geospatial_Data_Presentation_Form: vector digital data
      Series_Information:
        Series_Name: Open-File Report
        Issue_Identification: 2006-1008
      Publication_Information:
        Publication_Place: Woods Hole Science Center, Woods Hole, MA
        Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
      Online_Linkage: http://pubs.usgs.gov/of/2006/1008/gis/datazipped/mbbathybnds.zip
      Larger_Work_Citation:
        Citation_Information:
          Originator: Ackerman, S.D.
          Originator: Butman, B.
          Originator: Barnhardt, W.B.
          Originator: Danforth, W.W.
          Originator: Crocker, J.M.
          Publication_Date: 2006
          Title: High-Resolution Geologic Mapping of the Inner Continental Shelf: Boston Harbor and Approaches, Massachusetts
          Series_Information:
            Series_Name: Open-File Report
            Issue_Identification: 2006-1008
          Publication_Information:
            Publication_Place: Woods Hole Science Center, Woods Hole, MA
            Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
          Other_Citation_Details: 1 DVD-ROM
          Online_Linkage: http://pubs.usgs.gov/of/2006/1008
  Description:
    Abstract: This data is the boundary polygon for the high-resolution bathymetric measurements of the seafloor from Boston Harbor and the harbor approaches, Massachusetts. Approximately 170 km² of sidescan sonar and bathymetric data were collected by the National Oceanic and Atmospheric Administration (NOAA) Ship Whiting in 2000 and 2001 and reprocessed and gridded by the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS).
    Purpose: The geophysical dataset were collected by the National Oceanic and Atmospheric Administration (NOAA) National Ocean Service (NOS) branch as part of their periodic hydrographic mapping for nautical charting. The raw datasets were provided by NOAA to the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS) in Woods Hole, MA as part of a cooperative agreement to provide high resolution bathymetry and backscatter intensity maps and digital GIS information for resource management, scientific research, industry and the public.
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 20000919
        Ending_Date: 20011030
    Currentness_Reference: ground condition
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -71.055753
      East_Bounding_Coordinate: -70.814613
      North_Bounding_Coordinate: 42.438237
      South_Bounding_Coordinate: 42.260379
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: General
      Theme_Keyword: U.S. Geological Survey
      Theme_Keyword: USGS
      Theme_Keyword: Coastal and Marine Geology Program
      Theme_Keyword: CMGP
      Theme_Keyword: Woods Hole Science Center
      Theme_Keyword: WHSC
      Theme_Keyword: Massachusetts Office of Coastal Zone Management
      Theme_Keyword: CZM
      Theme_Keyword: Seafloor
      Theme_Keyword: Marine Geology
      Theme_Keyword: ESRI Shapefile
      Theme_Keyword: field activity serial number RAFA04019
      Theme_Keyword: Multibeam
      Theme_Keyword: Bathymetry
      Theme_Keyword: Reson SeaBat 8101
      Theme_Keyword: Reson
      Theme_Keyword: Topography
      Theme_Keyword: National Oceanic and Atmospheric Administration
      Theme_Keyword: NOAA
      Theme_Keyword: National Ocean Service
      Theme_Keyword: NOS
      Theme_Keyword: NOAA Ship Whiting
      Theme_Keyword: Hydrographic Survey
      Theme_Keyword: 32-bit floating point
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: oceans and estuaries
      Theme_Keyword: elevation
      Theme_Keyword: boundaries
    Place:
      Place_Keyword_Thesaurus: General
      Place_Keyword: Massachusetts Bay
      Place_Keyword: Atlantic Ocean
      Place_Keyword: Boston Harbor
      Place_Keyword: Nahant
      Place_Keyword: Boston
      Place_Keyword: Hull
      Place_Keyword: Hubline
      Place_Keyword: Boston Harbor Islands
    Stratum:
      Stratum_Keyword_Thesaurus: General
      Stratum_Keyword: Seafloor
  Access_Constraints: None
  Use_Constraints: Public domain data from the U.S. Government are 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: Seth Ackerman
        Contact_Organization: Massachusetts Office of Coastal Zone Management
      Contact_Position: Geologist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 384 Woods Hole Rd.
        City: Woods Hole
        State_or_Province: MA
        Postal_Code: 02543-1598
        Country: USA
      Contact_Voice_Telephone: 508-548-8700 x2315
      Contact_Facsimile_Telephone: 508-457-2310
      Contact_Electronic_Mail_Address: seth.ackerman@state.ma.us
  Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722
Data_Quality_Information:
  Logical_Consistency_Report: No additional checks for topological consistency were performed on this data.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: All of the NOAA survey vessels were equipped with Trimble DSM212L Differential Global Positioning System (DGPS) receivers.  Launch 1005, which collected all of the multibeam bathymetry, was also equipped with a TSS POS/MV Model 320 (Position and Orientation System for Marine Vessels).  Standard bathymetric processing, including tide corrections, soundings accuracy, and quality control were done by the NOAA Office of Coast Survey.
    Vertical_Positional_Accuracy:
      Vertical_Positional_Accuracy_Report: Tidal datum for this project is Mean Lower Low Water (MLLW).  The tide station at Boston, MA (844-3970) was the control for the vertical datum.
  Lineage:
    Source_Information:
      Type_of_Source_Media: External Hard Drive
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 20000919
            Ending_Date: 20011030
        Source_Currentness_Reference: ground condition
      Source_Contribution: The original geophysical data for this project were collected during four hydrographic surveys conducted by NOAA NOS in 2000 and 2001 on the NOAA Ship Whiting and its launches 1005/1014.  Multibeam bathymetric data were acquired with a Reson SeaBat 8101 and sidescan sonar backscatter data were acquired with Edgetech model 272-T (100 kHz) or the Klein T-5500 (455 kHz) sonar systems.
    Process_Step:
      Process_Description: A hull-mounted Reson SeaBat 8101 acquired the shallow-water multibeam data for all four surveys.  The Reson 8101 was operated at a frequency of 240 kHz and a maximum speed of 6 knots.  The system is designed for operation in water depths of 5 to 125 m, and has a horizontal range of 75 to 500 m that depends on water depth.  Each time the system fires or "pings", it collects 101 individual soundings in a swath oriented perpendicular to the vessel track.  Acquisition was monitored in real time with the ISIS software (version 5.29) and recorded to XTF format.  NOAA Office of Coast Survey converted the XTF data to CARIS HDCS (Hydrographic Data Cleaning System) format, then processed and tide-corrected the data with CARIS HIPS (Hydrographic Information Processing System) software. The CARIS HIPS database was transferred to the USGS/CZM in 2004 for use in this project.
    Process_Step:
      Process_Description: Tide-corrected multibeam soundings were exported from CARIS HIPS at a 2-meter grid interval for each of the survey areas and reformatted for input into the Swathed processing software (University of New Brunswick Ocean Mapping Group).   The soundings were gridded using the weigh_grid routine creating 2-meter bathymetry grids.  The OMG grid format (.r4) was converted to ASCII raster format.
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Seth Ackerman
            Contact_Organization: Massachusetts Office of Coastal Zone Management
          Contact_Position: Geologist
          Contact_Address:
            Address_Type: mailing and physical address
            Address: c/o U.S. Geological Survey
            Address: 384 Woods Hole Rd.
            City: Woods Hole
            State_or_Province: MA
            Postal_Code: 02543-1598
            Country: USA
          Contact_Voice_Telephone: 508-548-8700 x2315
          Contact_Facsimile_Telephone: 508-457-2310
          Contact_Electronic_Mail_Address: seth.ackerman@state.ma.us
    Process_Step:
      Process_Description: The ASCII raster format files were each imported to ArcGIS 9.0 using ArcToolbox ("ASCII to Raster") and then merged to create a master grid of multibeam bathymetry.
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Seth Ackerman
            Contact_Organization: Massachusetts Office of Coastal Zone Management
          Contact_Position: Geologist
          Contact_Address:
            Address_Type: mailing and physical address
            Address: c/o U.S. Geological Survey
            Address: 384 Woods Hole Rd.
            City: Woods Hole
            State_or_Province: MA
            Postal_Code: 02543-1598
            Country: USA
          Contact_Voice_Telephone: 508-548-8700 x2315
          Contact_Facsimile_Telephone: 508-457-2310
          Contact_Electronic_Mail_Address: seth.ackerman@state.ma.us
    Process_Step:
      Process_Description: In ArcMap (Spatial Analyst -> Raster Calculator) evaluated the expression "bh_2mmbbath > -32" the resulting was a temporary file 'calculation' with value = 1 where the multibeam data exists.  In ArcMap (Spatial Analyst -> Convert -> Raster to Features) the temp grid 'Calculation' was converted to a polygon shapefile (Input raster: Calculation, Field: Value, Output geometry type: Polygon).
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Seth Ackerman
            Contact_Organization: Massachusetts Office of Coastal Zone Management
          Contact_Position: Geologist
          Contact_Address:
            Address_Type: mailing and physical address
            Address: c/o U.S. Geological Survey
            Address: 384 Woods Hole Rd.
            City: Woods Hole
            State_or_Province: MA
            Postal_Code: 02543-1598
            Country: USA
          Contact_Voice_Telephone: 508-548-8700 x2315
          Contact_Facsimile_Telephone: 508-457-2310
          Contact_Electronic_Mail_Address: seth.ackerman@state.ma.us
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Vector
  Point_and_Vector_Object_Information:
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 444
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Grid_Coordinate_System:
        Grid_Coordinate_System_Name: Universal Transverse Mercator
        Universal_Transverse_Mercator:
          UTM_Zone_Number: 19
          Transverse_Mercator:
            Scale_Factor_at_Central_Meridian: 0.999600
            Longitude_of_Central_Meridian: -69.000000
            Latitude_of_Projection_Origin: 0.000000
            False_Easting: 500000.000000
            False_Northing: 0.000000
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: coordinate pair
        Coordinate_Representation:
          Abscissa_Resolution: 0.000032
          Ordinate_Resolution: 0.000032
        Planar_Distance_Units: meters
    Geodetic_Model:
      Horizontal_Datum_Name: D_WGS_1984
      Ellipsoid_Name: WGS_1984
      Semi-major_Axis: 6378137.000000
      Denominator_of_Flattening_Ratio: 298.257224
  Vertical_Coordinate_System_Definition:
    Depth_System_Definition:
      Depth_Datum_Name: Mean lower low water
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: multibeambathybnds
    Attribute:
      Attribute_Label: FID
      Attribute_Definition: Internal feature number.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated.
    Attribute:
      Attribute_Label: Shape
      Attribute_Definition: Feature geometry.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Coordinates defining the features.
    Attribute:
      Attribute_Label: ID
      Attribute_Definition: Multibeam area id number
    Attribute:
      Attribute_Label: Shape_Area
      Attribute_Definition: Area of feature in meters squared.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Positive real numbers that are automatically generated.
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Seth Ackerman
        Contact_Organization: Massachusetts Office of Coastal Zone Management
      Contact_Position: Geologist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: c/o U.S. Geological Survey
        Address: 384 Woods Hole Rd.
        City: Woods Hole
        State_or_Province: MA
        Postal_Code: 02543-1598
        Country: USA
      Contact_Voice_Telephone: 508-548-8700 x2315
      Contact_Facsimile_Telephone: 508-457-2310
      Contact_Electronic_Mail_Address: seth.ackerman@state.ma.us
  Resource_Description: Downloadable Data
  Distribution_Liability:
    Although this data set has been used by the U.S. Geological Survey (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.
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: Shapefile
        Format_Version_Number: ArcGIS 9.x
        Format_Specification: ESRI Polygon Shapefile
        File_Decompression_Technique: no compression applied
        Transfer_Size: 0.982
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: <http://pubs.usgs.gov/of/2006/1008/gis/datazipped/mbbathybnds.zip>
              Network_Resource_Name: <http://pubs.usgs.gov/of/2006/1008/html/appendix1.html>
              Network_Resource_Name: <http://pubs.usgs.gov/of/2006/1008/gis/OFR_2006_1008/shapes/>
        Offline_Option:
          Offline_Media: DVD-ROM
          Recording_Format: UDF
    Fees: None
  Technical_Prerequisites: These data are available in Environmental Systems Research Institute (ESRI) Shapefile format. The user must have software capable of importing and processing the data file.
Metadata_Reference_Information:
  Metadata_Date: 20060720
  Metadata_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Seth Ackerman
        Contact_Organization: Massachusetts Office of Coastal Zone Management
      Contact_Position: Geologist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: c/o U.S. Geological Survey
        Address: 384 Woods Hole Rd.
        City: Woods Hole
        State_or_Province: MA
        Postal_Code: 02543-1598
        Country: USA
      Contact_Voice_Telephone: 508-548-8700 x2315
      Contact_Facsimile_Telephone: 508-457-2310
      Contact_Electronic_Mail_Address: seth.ackerman@state.ma.us
  Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
  Metadata_Time_Convention: local time
  Metadata_Access_Constraints: None
  Metadata_Use_Constraints: None
  Metadata_Extensions:
    Online_Linkage: http://www.esri.com/metadata/esriprof80.html
    Profile_Name: ESRI Metadata Profile