Identification_Information:
  Citation:
    Citation_Information:
      Originator: Page C. Valentine
      Publication_Date: 2005
      Title: slope:  Sea floor slope analysis for the Stellwagen Bank National Marine Sanctuary region.
      Edition: 1.0
      Geospatial_Data_Presentation_Form: raster digital data
      Series_Information:
        Series_Name: Scientific Investigations Map
        Issue_Identification: 2840
      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/sim/2005/2840/data/slope/slope.zip
      Larger_Work_Citation:
        Citation_Information:
          Originator: Page C. Valentine, editor
          Publication_Date: 2005
          Title: Sea floor image maps showing topography, sun-illuminated topography, backscatter intensity, ruggedness, slope, and the distribution of boulder ridges and bedrock outcrops in the Stellwagen Bank National Marine Sanctuary region off Boston, Massachusetts
          Edition: 1.0
          Series_Information:
            Series_Name: Scientific Investigations Map
            Issue_Identification: 2840
          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/sim/2005/2840/
  Description:
    Abstract: The slope analysis of the Stellwagen Bank National Marine Sanctuary region off Boston, Massachusetts was performed using the slope tool in the Spatial Analyst extension in ArcGIS 8.3.  The slope tool calculates the maximum rate of change in elevation over a pixel and its eight neighbors for a surface.  The slope calculations were carried out for the bathymetric grids of the seafloor of this region.
    Purpose: The slope analysis provides an interpretation of the seabed features in the highly variable geomorphology of the Stellwagen Bank National Marine Sanctuary region.  The seabed geometry is variable due to its glacial origin and is important to the region's wide range of habitats and high biodiversity.
  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 2005
    Currentness_Reference: publication date
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: As needed
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -70.600077
      East_Bounding_Coordinate: -70.033436
      North_Bounding_Coordinate: 42.800106
      South_Bounding_Coordinate: 42.083366
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: General
      Theme_Keyword: Geographic Information Systems
      Theme_Keyword: GIS
      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: topographic data
      Theme_Keyword: sea floor topography
      Theme_Keyword: bathymetry
      Theme_Keyword: slope
      Theme_Keyword: sea floor features
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: oceans and estuaries
      Theme_Keyword: imageryBaseMapsEarthCover
      Theme_Keyword: geoscientificInformation
      Theme_Keyword: elevation
    Place:
      Place_Keyword_Thesaurus: General
      Place_Keyword: Massachusetts
      Place_Keyword: MA
      Place_Keyword: Stellwagen Bank National Marine Sanctuary
      Place_Keyword: SBNMS
      Place_Keyword: Shallow EEZ
      Place_Keyword: EEZ
      Place_Keyword: Gulf of Maine
      Place_Keyword: Atlantic Ocean
      Place_Keyword: Boston
  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.

    Not to be used for navigational purposes.
  Point_of_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Page C. Valentine
        Contact_Organization: U.S. Geological Survey
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 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)457-2239
      Contact_TDD/TTY_Telephone: (508)457-2239
      Contact_Facsimile_Telephone: (508)457-2310
      Contact_Electronic_Mail_Address: pvalentine@usgs.gov
  Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535
Data_Quality_Information:
  Lineage:
    Process_Step:
      Process_Description: The slope tool in Spatial Analyst 8.3 was used to determine the slope for the bathymetric grid.  This tool calculates the maximum rate of change in elevation over each pixel and its eight neighbors.
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Raster
  Raster_Object_Information:
    Raster_Object_Type: Grid Cell
    Row_Count: 6201
    Column_Count: 3631
    Vertical_Count: 1
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Map_Projection:
        Map_Projection_Name: Mercator
        Mercator:
          Standard_Parallel: 41.650000
          Longitude_of_Central_Meridian: -70.316667
          False_Easting: 0.000000
          False_Northing: 0.000000
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: row and column
        Coordinate_Representation:
          Abscissa_Resolution: 13.000000
          Ordinate_Resolution: 13.000000
        Planar_Distance_Units: meters
    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
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Page C. Valentine
        Contact_Organization: U.S. Geological Survey
      Contact_Position: Research Geologist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 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 x2239
      Contact_Facsimile_Telephone: (508) 457-2310
      Contact_Electronic_Mail_Address: pvalentine@usgs.gov
  Resource_Description: Downloadable Data
  Distribution_Liability:
    Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data.
    
    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: ARCG
        Transfer_Size: 85.859
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://pubs.usgs.gov/sim/2005/2840/data/slope/slope.zip
        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) ArcInfo GRID format.  The user must have software capable of importing and processing the data file.
Metadata_Reference_Information:
  Metadata_Date: 20050822
  Metadata_Review_Date: 20050822
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey
        Contact_Person: Page C. Valentine
      Contact_Position: Research Geologist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 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 x2239
      Contact_Facsimile_Telephone: (508) 457-2310
      Contact_Electronic_Mail_Address: pvalentine@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
