Identification_Information:
  Citation:
    Citation_Information:
      Originator: U.S. Geological Survey
      Publication_Date: 2007
      Title: ABMOS_GEOG.TIF - 1m Sidescan-Sonar Mosaic 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/sidescan/ABMos_geog.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 a 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 in mostly in depths > 2.0 meters.
    Purpose: These data are high-resolution acoustic backscatter measurements of the bottom of Apalachicola Bay Florida. This raster covers approximately 141 square kilometers of portions of Apalachicola Bay.
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 20050405,20060529
        Ending_Date: 20050405,20060627
    Currentness_Reference: ground condition
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -85.100153
      East_Bounding_Coordinate: -84.870099
      North_Bounding_Coordinate: 29.735570
      South_Bounding_Coordinate: 29.587814
  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 image
      Theme_Keyword: field activity serial number 05001
      Theme_Keyword: field activity serial number 06001
      Theme_Keyword: Sidescan
      Theme_Keyword: Sidescan-Sonar
      Theme_Keyword: Klein 3000
      Theme_Keyword: grey-scale image
      Theme_Keyword: gray-scale image
      Theme_Keyword: backscatter imagery
      Theme_Keyword: seafloor mapping
      Theme_Keyword: geologic mapping
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: oceans and estuaries
      Theme_Keyword: imageryBaseMapsEarthCover
      Theme_Keyword: geoscientificInformation
    Place:
      Place_Keyword_Thesaurus: General
      Place_Keyword: Apalachicola Bay
      Place_Keyword: Florida
      Place_Keyword: Apalachicola National Estuarine Research Reserve
      Place_Keyword: United States
      Place_Keyword: Gulf of Mexico
    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/apbaymos1m.jpg
    Browse_Graphic_File_Description: gray scale image of backscatter values
    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
  Cross_Reference:
    Citation_Information:
      Originator: Danforth, W.W.
      Publication_Date: 1997
      Title: Xsonar/ShowImage: a complete system for rapid sidescan-sonar processing and display
      Edition: 1.0
      Series_Information:
        Series_Name: Open-File Report
        Issue_Identification: 97-686
      Publication_Information:
        Publication_Place: Woods Hole Science Center, Woods Hole, Massachusetts
        Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
      Larger_Work_Citation:
        Citation_Information:
          Originator: Danforth, W.W.
          Publication_Date: 1997
          Title: Xsonar/ShowImage: A complete system for rapid sidescan-sonar processing and display
  Cross_Reference:
    Citation_Information:
      Originator: Paskevich, V.F.
      Publication_Date: 1992
      Title: Digital mapping of sidescan-sonar data with the Woods Hole Image Processing System
      Edition: 1.0
      Series_Information:
        Series_Name: Open-File Report
        Issue_Identification: 92-536
      Publication_Information:
        Publication_Place: Woods Hole Science Center, Woods Hole, Massachusetts
        Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Data_Quality_Information:
  Attribute_Accuracy:
  Completeness_Report: Although both the 100 kHz and 500 kHz frequency data were collected, only the low frequency 100 kHz data processed and included in this mosaic. Small differences in contrast stretch (DN values) exist because of variations in sea and weather conditions on each survey day.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: RTK-GPS is assumed to be accurate within 1-2 meters. Standard GPS is assumed accurate within 5-10 meters. 99% of the positional data are DGPS. Unless noted, all GPS/DGPS data are referenced to WGS84 (NAD83). The sidescan-sonar towfish was towed from an outrigger on the starboard side of the survey vessel in 2005 and the port side in 2006 such that the sonar was about 1-m below the surface and even with the stern of the survey vessel.
  Lineage:
    Process_Step:
      Process_Description: The apbaymos1m.tif sidescan-sonar image was reprojected from WGS 84, UTM (zone 16N) to WGS 84, Geographic using the Blue Marble Geographics software (v. 5.2).  The "Afine" option was used for the transformation model, the "Image extents" were used for the transformation area, and the output central latitude was 0 N and the pixel size was set to 1 m.
      Source_Used_Citation_Abbreviation: apbaymos1m.tif
      Process_Date: 200707
      Source_Produced_Citation_Abbreviation: ABMos_geog.tif
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: David Twichell
            Contact_Organization: U.S. Geological Survey
          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 x2266
          Contact_Facsimile_Telephone: 508-457-2310
          Contact_Electronic_Mail_Address: dtwichell@usgs.gov
    Process_Step:
      Process_Description: Metadata imported.
      Source_Used_Citation_Abbreviation: G:\OFR_1381_Raster\sidescan\ABMos_geog.tif.xml
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Raster
  Raster_Object_Information:
    Raster_Object_Type: Pixel
    Row_Count: 16338
    Column_Count: 25438
    Vertical_Count: 1
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Geographic:
      Latitude_Resolution: 0.000000
      Longitude_Resolution: 0.000000
      Geographic_Coordinate_Units: Decimal degrees
    Planar:
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: row and column
        Coordinate_Representation:
          Abscissa_Resolution: 0.000009
          Ordinate_Resolution: 0.000009
    Geodetic_Model:
      Horizontal_Datum_Name: D_WGS_1984
      Ellipsoid_Name: WGS_1984
      Semi-major_Axis: 6378137.000000
      Denominator_of_Flattening_Ratio: 298.257224
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
    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: Red
    Attribute:
      Attribute_Label: Green
    Attribute:
      Attribute_Label: Blue
  Overview_Description:
    Entity_and_Attribute_Overview: There are no attributes associated with a GeoTIFF image.  Image pixel values contain acoustic reflectivity values normalized to an 8-bit data range (0-255).  Low-backscatter is represented by dark tones (low values) and high-backscatter is represented by bright tones (high values).
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 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: TIFF
        Format_Version_Number: ArcGIS 9.2
        Format_Specification: GeoTIFF
        Format_Information_Content: File contains sidescan-sonar imagery data collected in Apalachicola Bay, Florida
        File_Decompression_Technique: zip
        Transfer_Size: 0.000
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://pubs.usgs.gov/of/2006/1381/GIS/raster/sidescan/ABMos_geog.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: 20070828
  Metadata_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
  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