Identification_Information:
  Citation:
    Citation_Information:
      Originator: Bradford Butman
      Originator: Tammie Middleton
      Publication_Date: 2007
      Title: WMB_1MCTR.SHP - 1-m interval contours of smoothed multibeam bathymetry in western Massachusetts Bay map Quadrangles 1-3
      Edition: 1.0
      Geospatial_Data_Presentation_Form: vector digital data
      Series_Information:
        Series_Name: Data Series
        Issue_Identification: 99
      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/ds/99/massbay_gis/2_multibeam/bathymetry/wmb_1mctr.zip
      Online_Linkage: http://pubs.usgs.gov/ds/99/webpages/massbay.html
      Larger_Work_Citation:
        Citation_Information:
          Originator: Butman, Bradford
          Originator: Valentine, Page C.
          Originator: Middleton, Tammie J.
          Originator: Danforth, William W.
          Publication_Date: 2007
          Title: A GIS Library of Multibeam Data for Massachusetts Bay and the Stellwagen Bank National Marine Sanctuary, Offshore of Boston, Massachusetts
          Edition: 1.0
          Series_Information:
            Series_Name: Data Series
            Issue_Identification: 99
          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/ds/99/
  Description:
    Abstract:
      The U.S. Geological Survey has conducted geologic mapping to characterize the sea floor offshore of Massachusetts.  The mapping was carried out using a Simrad Subsea EM 1000 Multibeam Echo Sounder on the Frederick G. Creed on four cruises conducted between 1994 and 1998.  The mapping was conducted in cooperation with the National Oceanic and Atmospheric Administration (NOAA) and with support from the Canadian Hydrographic Service and the University of New Brunswick. 
       
      The long-term goal of this mapping effort is to produce high-resolution geologic maps and a Geographic Information System (GIS) project that presents images and grids of bathymetry, shaded relief bathymetry, and backscatter intensity data from these surveys that will serve the needs of research, management and the public.
    Purpose: This shapefile shows sea floor bathymetry as contours at 5-m intervals in western Massachusetts Bay (map Quadrangles 1 - 3).  The contours were derived from a 6-m resolution grid of multibeam data (wmb_bathy6m) that had been smoothed over a 9-cell by 9-cell rectangle using the "focalmedian" routine.
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 1994
        Ending_Date: 1998
    Currentness_Reference: publication date
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -70.882018
      East_Bounding_Coordinate: -70.600055
      North_Bounding_Coordinate: 42.624645
      South_Bounding_Coordinate: 42.203387
  Keywords:
    Theme:
      Theme_Keyword: bathymetry
      Theme_Keyword: contour
      Theme_Keyword: 1-meter contour
      Theme_Keyword: USGS Map I-2731
      Theme_Keyword: USGS Map I-2732
      Theme_Keyword: USGS Map I-2733
      Theme_Keyword: western Massachusetts Bay Quadrangle 1
      Theme_Keyword: western Massachusetts Bay Quadrangle 2
      Theme_Keyword: western Massachusetts Bay Quadrangle 3
      Theme_Keyword: polyline
      Theme_Keyword: sea floor
      Theme_Keyword: shapefile
      Theme_Keyword: Woods Hole Science Center
      Theme_Keyword: WHSC
      Theme_Keyword: Coastal and Marine Geology Program
      Theme_Keyword: CMGP
      Theme_Keyword: U.S. Geological Survey
      Theme_Keyword: USGS
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: oceans
      Theme_Keyword: oceans and estuaries
      Theme_Keyword: oceans and coastal
      Theme_Keyword: elevation
    Place:
      Place_Keyword_Thesaurus: General
      Place_Keyword: Massachusetts Bay
      Place_Keyword: western Massachusetts Bay
      Place_Keyword: Boston
      Place_Keyword: Gloucester
      Place_Keyword: Massachusetts
      Place_Keyword: Stellwagen Basin
      Place_Keyword: MWRA ocean outfall
      Place_Keyword: MWRA
      Place_Keyword: Gulf of Maine
      Place_Keyword: United States
      Place_Keyword: North Atlantic Ocean
  Access_Constraints: None
  Use_Constraints:
    These data are not to be used for navigation purposes.  Mariners should refer to the appropriate nautical chart.

    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_Organization_Primary:
        Contact_Organization: U.S. Geological Survey
        Contact_Person: Bradford Butman
      Contact_Position: Oceanographer
      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 x2212
      Contact_Facsimile_Telephone: (508) 457-2309
      Contact_Electronic_Mail_Address: bbutman@usgs.gov
      Hours_of_Service: 8 a.m. - 5 p.m.
  Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.1.1332
Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report: Data were verified by plotting over acquired bathymetric data and visually matching contours with depth values.
  Logical_Consistency_Report: These data are logically consistent.
  Completeness_Report: The multibeam bathymetric data, on which these contours are based, were corrected for tidal elevation during the survey using sea level measured at the NOAA Boston tide gage.  This assumes that the tidal elevation and phase are the same as Boston across the survey area.  Further processing to correct for the spatial and temporal changes in tidal elevation across the survey area may be undertaken at a later time.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: These data were navigated with a Differential Global Positioning System (DGPS); they are accurate to +/- 3 meters, horizontally.
    Vertical_Positional_Accuracy:
      Vertical_Positional_Accuracy_Report: These data have been corrected for vessel motion (roll, pitch, heave, yaw) and tidal offsets, and referenced to mean lower low water.  The theoretical vertical resolution of the Simrad EM-1000 multibeam echosounder is 1 % of water depth, approximately 0.3 - 1.0 m within the study area.
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: U.S. Geological Survey
          Publication_Date: 2007
          Title: WMB_BATHY6M - 6-m resolution grid of multibeam bathymetry of western Massachusetts Bay map Quadrangles 1-3
          Edition: 1.0
          Geospatial_Data_Presentation_Form: raster digital data
          Series_Information:
            Series_Name: Data Series
            Issue_Identification: 99
          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/ds/99/massbay_gis/2_multibeam/grids/wmb_bathy6m.zip
          Larger_Work_Citation:
            Citation_Information:
              Originator: Butman, Bradford
              Originator: Valentine, Page C.
              Originator: Middleton, Tammie J.
              Originator: Danforth, William W.
              Publication_Date: 2007
              Title: A GIS Library of Multibeam Data for Massachusetts Bay and the Stellwagen Bank National Marine Sanctuary, Offshore of Boston, Massachusetts
              Edition: 1.0
              Series_Information:
                Series_Name: Data Series
                Issue_Identification: 99
              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/ds/99/
      Type_of_Source_Media: disc
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 1994
            Ending_Date: 1998
        Source_Currentness_Reference: ground condition
      Source_Citation_Abbreviation: wmb_bathy6m; Butman and others (2007)
      Source_Contribution: Composite raster grid data of the 6-m multibeam bathymetry for western Massachusetts Bay
    Process_Step:
      Process_Description: Bathymetric contours at 1-m intervals were derived from a 6-m resolution grid of multibeam bathymetry using the "latticecontour" routine.  The 6-m grid (wmb_bathy6m) was smoothed over a 9-cell by 9-cell rectangle using the "focalmedian" function in ARCGRID.  The contours were converted to a shapefile in ArcGIS.
      Source_Used_Citation_Abbreviation: wmb_bathy6m; Butman and others (2007)
      Process_Date: 200702
      Source_Produced_Citation_Abbreviation: wmb_1mctr.shp
      Source_Produced_Citation_Abbreviation: wmb_1mctr.dbf
      Source_Produced_Citation_Abbreviation: wmb_1mctr.shx
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: William Danforth
            Contact_Organization: U.S. Geological Survey
          Contact_Position: Operational Geologist
          Contact_Address:
            Address_Type: mailing and physical address
            Address: 384 Woods Hole Road
            City: Woods Hole
            State_or_Province: MA
            Postal_Code: 02543-1598
            Country: USA
          Contact_Voice_Telephone: (508) 548-8700 x2274
          Contact_Facsimile_Telephone: (508) 457-2310
          Contact_Electronic_Mail_Address: bdanforth@usgs.gov
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Vector
  Point_and_Vector_Object_Information:
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: String
      Point_and_Vector_Object_Count: 9712
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Geographic:
      Latitude_Resolution: 0.000000
      Longitude_Resolution: 0.000000
      Geographic_Coordinate_Units: Decimal degrees
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1983
      Ellipsoid_Name: Geodetic Reference System 80
      Semi-major_Axis: 6378137.000000
      Denominator_of_Flattening_Ratio: 298.257222
  Vertical_Coordinate_System_Definition:
    Depth_System_Definition:
      Depth_Datum_Name: Mean lower low water
      Depth_Resolution: 0.5
      Depth_Distance_Units: Meters
      Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: wmb_1mctr
    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: FNODE_
      Attribute_Definition: internal number of the start x,y coordinate pair for the arc
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 0
          Enumerated_Domain_Value_Definition: integer
    Attribute:
      Attribute_Label: TNODE_
      Attribute_Definition: internal number of the end x,y coordinate pair for the arc
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 0
          Enumerated_Domain_Value_Definition: integer
    Attribute:
      Attribute_Label: LPOLY_
      Attribute_Definition: internal number of the polygon to the left of the arc
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 0
          Enumerated_Domain_Value_Definition: integer
    Attribute:
      Attribute_Label: RPOLY_
      Attribute_Definition: internal number of the polygon to the right of the arc
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 0
          Enumerated_Domain_Value_Definition: integer
    Attribute:
      Attribute_Label: LENGTH
      Attribute_Definition: length of the arc
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.6359
          Range_Domain_Maximum: 2252.3253
          Attribute_Units_of_Measure: meters
    Attribute:
      Attribute_Label: CONTOUR
      Attribute_Definition: depth in meters of bathymetric contour
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 5
          Range_Domain_Maximum: 86
          Attribute_Units_of_Measure: meters
          Attribute_Measurement_Resolution: 1
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Bradford Butman
        Contact_Organization: U.S. Geological Survey
      Contact_Position: Oceanographer
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 384 Woods Hole Road
        City: Woods Hole
        State_or_Province: Massachusetts
        Postal_Code: 02543-1598
        Country: USA
      Contact_Voice_Telephone: (508) 548-8700 x2212
      Contact_Facsimile_Telephone: (508) 457-2309
      Contact_Electronic_Mail_Address: bbutman@usgs.gov
      Hours_of_Service: 8 a.m. to 5 p.m. EST
  Resource_Description: Downloadable Data
  Distribution_Liability:
    Although these data have been used by the U.S. Geological Survey (USGS), U.S. Department of the Interior (DOI), no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data.  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: SHP
        Format_Version_Number: 3.3
        Format_Specification: ESRI polyline shapefile
        Format_Information_Content: Zip archive file containing the follow items. The SHP file contains the geospatial data. The SHX file contains the index of the geospatial data. The DBF file contains the attribute data in dBase format. The PRJ file contains the coordinate system information (optional). The AVL file contains the legend information (optional). The SBN and SBX files contain the spatial index of the geospatial data (optional). The XML file contains the metadata describing the data set "data set name".shp.xml.  An ASCII version of the metadata file.  A browse graphic showing the data layer coverage and extent (optional).
        File_Decompression_Technique: zip archive
        Transfer_Size: 22.428
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://pubs.usgs.gov/ds/99/massbay_gis/2_multibeam/bathymetry/wmb_1mctr.zip
          Access_Instructions: Data may be downloaded via the World Wide Web.
        Offline_Option:
          Offline_Media: DVD-ROM
          Recording_Capacity:
            Recording_Density: 4.75
            Recording_Density_Units: Gbytes
          Recording_Format: UDF
    Fees: None
  Technical_Prerequisites: These data are available in Environmental Systems Research Institute (ESRI) shapefile format.  The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file.  In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of the importing data.  A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com.
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey Information Services
      Contact_Address:
        Address_Type: mailing address
        Address: Box 25286 Denver Federal Center
        City: Denver
        State_or_Province: Colorado
        Postal_Code: 80225-0046
        Country: USA
      Contact_Voice_Telephone: (303) 202-4700
      Contact_Facsimile_Telephone: (303) 202-4188
      Hours_of_Service: 8 a.m. to 5 p.m. Mountain Time
  Resource_Description: Downloadable Data
  Distribution_Liability:
    Although these data have been used by the U.S. Geological Survey (USGS), U.S. Department of the Interior (DOI), no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data.  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: SHP
        Format_Version_Number: 3.3
        Format_Specification: ESRI polyline shapefile
        Format_Information_Content: Zip archive file containing the follow items. The SHP file contains the geospatial data. The SHX file contains the index of the geospatial data. The DBF file contains the attribute data in dBase format. The PRJ file contains the coordinate system information (optional). The AVL file contains the legend information (optional). The SBN and SBX files contain the spatial index of the geospatial data (optional). The XML file contains the metadata describing the data set "data set name".shp.xml.  An ASCII version of the metadata file.  A browse graphic showing the data layer coverage and extent (optional).
        File_Decompression_Technique: zip archive
        Transfer_Size: 22.428
    Fees: None
  Technical_Prerequisites: These data are available in Environmental Systems Research Institute (ESRI) shapefile format.  The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file.  In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of the importing data.  A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com.
Metadata_Reference_Information:
  Metadata_Date: 20070327
  Metadata_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Bradford Butman
        Contact_Organization: U.S. Geological Survey
      Contact_Position: Oceanographer
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 384 Woods Hole Road
        City: Woods Hole
        State_or_Province: MA
        Postal_Code: 02543-1598
        Country: USA
      Contact_Voice_Telephone: (508) 548-8700 x2212
      Contact_Facsimile_Telephone: (508) 457-2310
      Contact_Electronic_Mail_Address: bbutman@usgs.gov
  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
