Identification_Information:
  Citation:
    Citation_Information:
      Originator: U.S. Geological Survey
      Publication_Date: 2007
      Title: APBAY2M_BATH.tif- 2m GeoTIFF of Swath Bathymetry of Apalachicola Bay, Florida
      Edition: 1.0
      Geospatial_Data_Presentation_Form: remote-sensing image
      Series_Information:
        Series_Name: Open-File Report
        Issue_Identification: 2006-1381
      Publication_Information:
        Publication_Place: Woods Hole Science Center, Woods Hole, Massachusetts
        Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
      Online_Linkage: http://pubs.usgs.gov/of/2006/1381/GIS/raster/bath/ApBay2m_Bath.zip
      Larger_Work_Citation:
        Citation_Information:
          Originator: David C. Twichell
          Originator: Brian D. Andrews
          Originator: H. Lee Edmiston
          Originator: William R. Stevenson
          Publication_Date: 2007
          Title: Geophysical Mapping of oyster habitats in a shallow estuary; Apalachicola Bay, Florida
          Edition: 1.0
          Series_Information:
            Series_Name: Open-File Report
            Issue_Identification: 2006-1381
          Publication_Information:
            Publication_Place: Woods Hole Science Center, Woods Hole, Massachusetts
            Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
          Online_Linkage: http://pubs.usgs.gov/of/2006/1381/
  Description:
    Abstract:
      These data were collected under a cooperative mapping program between the U.S. Geological Survey (USGS), the National Oceanic and Atmospheric Administration Coastal Services Center (NOAA\CSC), and the Apalachicola National Estuarine Research Reserve (NERR). The primary objectives of this program were to collect marine geophysical data to develop a suite of seafloor maps to better define the extent of oyster habitats, the overall seafloor geology of the bay and provide updated information for management of this resource. In addition to their value for management of the bay's oyster resources, the maps also provide a geologic framework for scientific research and the public.

      High-resolution bathymetry, backscatter intensity, and seismic profile data were collected over 230 square kilometers of the floor of the bay. The study focused on the Apalachicola Bay and Western St. George Sound portions of the estuary mostly in depths > 2.0 meters.
    Purpose: This image represents high-resolution bathymetric soundings of the bottom of Apalachicola Bay, Florida. This image covers approximately 145 square kilometers of portions of Apalachicola Bay between 0m -16.0m deep.
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 20050405,20060602
        Ending_Date: 20050405,20060603
    Currentness_Reference: ground condition
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -85.100148
      East_Bounding_Coordinate: -84.870076
      North_Bounding_Coordinate: 29.735565
      South_Bounding_Coordinate: 29.587799
  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: Seafloor
      Theme_Keyword: Marine Geology
      Theme_Keyword: GeoTIFF
      Theme_Keyword: field activity serial number 05001
      Theme_Keyword: field activity serial number 06001
      Theme_Keyword: Swath Bathymetry
      Theme_Keyword: Interferometric Sonar
      Theme_Keyword: color-encoded bathymetry
      Theme_Keyword: pseudo-colored encoded bathymetry
      Theme_Keyword: seafloor mapping
      Theme_Keyword: geologic mapping
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: oceans and estuaries
      Theme_Keyword: elevation
      Theme_Keyword: imageryBaseMapsEarthCover
    Place:
      Place_Keyword_Thesaurus: General
      Place_Keyword: Apalachicola Bay
      Place_Keyword: Florida
      Place_Keyword: Apalachicola National Estuarine Research Reserve
      Place_Keyword: Gulf of Mexico
      Place_Keyword: United States
    Stratum:
      Stratum_Keyword_Thesaurus: General
      Stratum_Keyword: Seafloor
    Temporal:
      Temporal_Keyword_Thesaurus: General
      Temporal_Keyword: 2005
      Temporal_Keyword: 2006
  Access_Constraints: None
  Use_Constraints:
    Data are not intended for navigational use.

    These data should not be used at resolutions for which it is not intended.

    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: Brian Andrews
        Contact_Organization: U.S. Geological Survey
      Contact_Position: Geographer
      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 x2348
      Contact_Facsimile_Telephone: 508-457-2310
      Contact_Electronic_Mail_Address: bandrews@usgs.gov
  Browse_Graphic:
    Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2006/1381/GIS/thumbnails/ApBay2m_Bathtiff.jpg
    Browse_Graphic_File_Description: color coded image
    Browse_Graphic_File_Type: JPEG
  Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350
Data_Quality_Information:
  Logical_Consistency_Report: These data have not been quantitatively compared to previous hydrographic data, although they generally agree with qualitative comparison of published NOAA charts
  Completeness_Report: This GeoTIFF image is an image representation of the raster grid (apbay2mbath) for the Apalachicola Bay portion of the study area.  Bathymetric tie lines were collected and used for qualitative assessment but were not included in the final grids or GeoTIFF.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
    Vertical_Positional_Accuracy:
  Lineage:
    Process_Step:
      Process_Description:
        Bathymetric data were corrected for variations in the speed of sound throughout the water column; sound velocity profiles were acquired throughout the survey area using an Applied MicroSystems SVPlus Sound Velocimeter. These data were downloaded and reformatted to the required format needed for use within University of New Brunswick's Ocean Mapping Group (OMG) SwathEd multibeam processing software. The raw Submetrix 2000 Series data were "unraveled" and reformatted into the OMG format. This process creates several files on disk: 

        1) bathymetric soundings
        2) raw sidescan backscatter
        3) navigation
        4) parameter files describing the configuration of the system (i.e. offsets between motion reference unit and GPS antenna, etc). This process also incorporates the sound velocity profiles in order to properly trace the rays given the structure of the water column.
      Process_Date: 200612
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Brian Andrews
            Contact_Organization: U.S. Geological Survey
          Contact_Position: Geographer
          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 x2348
          Contact_Facsimile_Telephone: 508-457-2310
          Contact_Electronic_Mail_Address: bandrews@usgs.gov
    Process_Step:
      Process_Description: The OMG formatted bathymetric data were then graphically edited using the SwathEd multibeam processing software. This enabled editing on a "ping-by-ping" basis, both in the across- and along-track dimension. Spurious or erroneous data were removed. The navigation data were also graphically examined for each line of data.
      Process_Date: 200612
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Brian Andrews
            Contact_Organization: U.S. Geological Survey
          Contact_Position: Geographer
          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 x2348
          Contact_Facsimile_Telephone: 508-457-2310
          Contact_Electronic_Mail_Address: bandrews@usgs.gov
    Process_Step:
      Process_Description: Soundings were corrected to mean lower low water (MLLW) using high-resolution Real-Time Kinematic Global Positioning System (RTKGPS) measurements. The one second RTK data were smoothed in MatLab using a 3rd order polynomial and then merged with each line file in SwathEd.
      Process_Date: 200612
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Brian Andrews
            Contact_Organization: U.S. Geological Survey
          Contact_Position: Geographer
          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 x2348
          Contact_Facsimile_Telephone: 508-457-2310
          Contact_Electronic_Mail_Address: bandrews@usgs.gov
    Process_Step:
      Process_Description:
        Soundings data were gridded using the weigh_grid routines from SwathEd. Soundings were corrected to mean lower low water during the weigh_grid operation using the real time kinematic Differential Global Positioning navigation files.

        The final weigh_grid parameters used were:
        weigh_grid -omg -coeffs -butter -lambda 5 -cutoff 20  

        Max_incidence angle was not used on most lines as it allowed using sounding from the entire swath. Only lines from rough days when the vessel heave was large were gridded with a small incidence angle to maximize the good data from adjacent lanes and reduce the noisy data.
      Process_Date: 200612
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Brian Andrews
            Contact_Organization: U.S. Geological Survey
          Contact_Position: Geographer
          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 x2348
          Contact_Facsimile_Telephone: 508-457-2310
          Contact_Electronic_Mail_Address: bandrews@usgs.gov
    Process_Step:
      Process_Description: Final SwathEd *r4 grid was imported to IVS Dmagic and converted to a *dtm and *.geo file. A suitable color ramp and hillshade parameters were applied creating a *shade file. IVS shade file (.shade) was then converted to an 8 Bit unsigned integer GeoTIFF using IVS ImageViewer.
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Brian Andrews
            Contact_Organization: U.S. Geological Survey
          Contact_Position: Geographer
          Contact_Address:
            Address_Type: mailing and physical address
            Address: 384 Woods Hole Road
            City: Woods Hole
            State_or_Province: MA
            Postal_Code: 02543-1598
          Contact_Voice_Telephone: 508-548-8700 x 2348
          Contact_Facsimile_Telephone: 508-457-2310
          Contact_Electronic_Mail_Address: bandrews@usgs.gov
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Raster
  Raster_Object_Information:
    Raster_Object_Type: Pixel
    Row_Count: 8000
    Column_Count: 11000
    Vertical_Count: 1
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Grid_Coordinate_System:
        Grid_Coordinate_System_Name: Universal Transverse Mercator
        Universal_Transverse_Mercator:
          UTM_Zone_Number: 16
          Transverse_Mercator:
            Scale_Factor_at_Central_Meridian: 0.999600
            Longitude_of_Central_Meridian: -87.000000
            Latitude_of_Projection_Origin: 0.000000
            False_Easting: 500000.000000
            False_Northing: 0.000000
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: row and column
        Coordinate_Representation:
          Abscissa_Resolution: 2.000000
          Ordinate_Resolution: 2.000000
        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
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Attribute values
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Band_1
    Attribute:
      Attribute_Label: ObjectID
      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: Value
    Attribute:
      Attribute_Label: Count
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Brian Andrews
        Contact_Organization: U.S. Geological Survey
      Contact_Position: Geographer
      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 x2348
      Contact_Facsimile_Telephone: 508-457-2310
      Contact_Electronic_Mail_Address: bandrews@usgs.gov
  Resource_Description: Downloadable Data
  Distribution_Liability:
    Although this dataset 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: TIFF
        Format_Version_Number: ArcGIS 9.2
        Format_Specification: GeoTIFF
        Format_Information_Content: File contains GeoTIFF of color coded depth values in the St. George Sound survey area.
        File_Decompression_Technique: zip
        Transfer_Size: 335.878
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://pubs.usgs.gov/of/2006/1381/GIS/raster/bath/ApBay2m_Bath.zip
          Access_Instructions: Data can be downloaded via the World Wide Web (WWW)
        Offline_Option:
          Offline_Media: DVD-ROM
          Recording_Capacity:
            Recording_Density: 4.75
            Recording_Density_Units: Gbytes
          Recording_Format: UDF
          Compatibility_Information: None
    Fees: None
  Technical_Prerequisites: These data are available in GeoTIFF format.  The user must have software capable of viewing a GeoTIFF data file.
Metadata_Reference_Information:
  Metadata_Date: 20070827
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey
        Contact_Person: Brian Andrews
      Contact_Position: Geographer
      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 x2348
      Contact_Facsimile_Telephone: 508-457-2310
      Contact_Electronic_Mail_Address: bandrews@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