Identification_Information:
  Citation:
    Citation_Information:
      Originator: Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
      Publication_Date: 20050801
      Title: Benthic Habitat Mapping - Dry Tortugas RoxAnn Acoustic Sensor Data Points
      Edition: 1.0
      Geospatial_Data_Presentation_Form: Map
      Publication_Information:
        Publication_Place: Charleston, SC
        Publisher: NOAA's Ocean Service, Coastal Services Center (CSC)
      Online_Linkage: ftp://ftp.csc.noaa.gov/pub/benthic/fl_dt01.ZIP
      Online_Linkage: http://www.csc.noaa.gov/benthic/data/gulf/tortugas.htm
      Online_Linkage: http://www.csc.noaa.gov/benthic/
      Online_Linkage: http://www.csc.noaa.gov/
      Larger_Work_Citation:
        Citation_Information:
          Originator: NOAA Beaufort Laboratory
          Publication_Date: 20040401
          Title: Biogeographic Analysis of the Tortugas Ecological Reserve Examining the Refuge Effect Following Reserve Establishment
          Publication_Information:
            Publication_Place: Silver Spring, MD
            Publisher: Marine Sanctuaries Division
  Description:
    Abstract: During April 2001 RoxAnn single-beam acoustic surveys were conducted at the North Unit of the Tortugas Ecological Reserve, Florida. Thirteen transects associated with fixed bottom sampling stations were surveyed to characterize the ecotone around the stations. In addition survey tracks were run along the outer edge of the Tortugas platform reef complex and into the interior of the platform. A towed video sled (minibat) was deployed simultaneously with the RoxAnn survey which provided a live video ground truth to the acoustic signals. Using this ground truth several bottom classes were identified including coral, seagrass, algae, unconsolidated sediments, and hardbottoms. The original RoxAnn categories are preserved in the Class field and benthic habitat codes from the Florida System for Classifying Estuarine and Marine Environments (SCHEME) system are preserved in the SCHEME field. The depth value is in meters below transducer surface.
    Purpose: The single-beam surveys were part of a larger biogeographic characterization effort intended to characterize benthic habitats, ocean circulation patterns, in the newly established Tortugas Ecological Reserve. The goal of the project was to establish a baseline of environmental conditions and processes that could be compared to future surveys. This would support evaluations of various reserve management strategies.
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 20010408
        Ending_Date: 20010412
    Currentness_Reference: Ground Condition
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -82.9968785850452
      East_Bounding_Coordinate: -82.764817554986
      North_Bounding_Coordinate: 24.7390892558496
      South_Bounding_Coordinate: 24.5194528984085
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: Environmental Monitoring
      Theme_Keyword: RoxAnn
      Theme_Keyword: Single-Beam Acoustics
      Theme_Keyword: Benthic Habitat
      Theme_Keyword: Depth
      Theme_Keyword: SCHEME
      Theme_Keyword: CSC Benthic Habitat Mapping
      Theme_Keyword: CoRIS
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: environment
      Theme_Keyword: biota
    Place:
      Place_Keyword_Thesaurus: None
      Place_Keyword: Gulf of Mexico
      Place_Keyword: Florida
      Place_Keyword: Dry Tortugas
      Place_Keyword: Tortugas Ecological Reserve
      Place_Keyword: Florida Keys National Marine Sanctuary
  Access_Constraints: None
  Use_Constraints: Bathymetric data have not been corrected for tide and wind variables. Not for use in navigation.
  Point_of_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: NOAA Coastal Services Center
      Contact_Address:
        Address_Type: mailing and physical
        Address: 2234 South Hobson Avenue
        City: Charleston
        State_or_Province: South Carolina
        Postal_Code: 29405
        Country: USA
      Contact_Voice_Telephone: (843) 740-1264
      Contact_Facsimile_Telephone: (843) 740-1289
      Hours_of_Service: 8:00 - 17:00 EST
  Native_Data_Set_Environment: ArcView version 3.2 shapefile format
Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report: This data is accurate to field conditions in April 2001. The depth readings have not been corrected for tide stage or wind variables. A towed video system (mini-bat) was deployed behind the vessel where the acoustic transducer was deployed. This provided real-time ground-truth to the acoustic signals. As habitat boundaries were crossed, the RoxAnn acoustic signature box was updated and checked. In  addition dive observations were made along the transects to verify the habitat classes.
  Logical_Consistency_Report: These data are believed to be logically consistent, though no tests have been performed. Point geometry is topologically clean.
  Completeness_Report: The data is complete.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: The horizontal positional accuracy is based on the accuracy of the GPS used to generate the coordinate pair for each acoustic record. The GPS unit was a military grade receiver enabled to receive encrypted Y-code from the GPS satellites. his typically produces a spatial accuracy of 10 meters or less.
    Vertical_Positional_Accuracy:
      Vertical_Positional_Accuracy_Report: Depth value is in meters below transducer. No correction has been applied for wind or tide effects. No validation was performed on this data and no accuracy is implied.
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
          Publication_Date: 20050801
          Title: Dry Tortugas RoxAnn Points
          Edition: 1.0
          Geospatial_Data_Presentation_Form: map
          Publication_Information:
            Publication_Place: Charleston, SC
            Publisher: NOAA's Ocean Service, Coastal Services Center (CSC)
          Online_Linkage: http://www.csc.noaa.gov/benthic/data/data.htm
          Larger_Work_Citation:
            Citation_Information:
              Originator: NOAA Beaufort Laboratory
              Publication_Date: 20040401
              Title: Biogeographic Analysis of the Tortugas Ecological Reserve Examining the Refuge Effect Following Reserve Establishment
              Publication_Information:
                Publication_Place: Silver Spring, MD
                Publisher: NOAA Marine Sanctuaries Division
      Type_of_Source_Media: map
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 20010408
            Ending_Date: 20010412
        Source_Currentness_Reference: Ground Condition
      Source_Citation_Abbreviation: NOAA CSC
      Source_Contribution: Unknown
    Process_Step:
      Process_Description: Between 8 and 12 April 2001 RoxAnn single-beam acoustic data were collected along 16 transects running across the edge of the Tortugas platform reef. The transducer was mounted on a pole attached to the side of the research vessel and was co-located with a PLGR GPS unit. Data were recorded at 1 second intervals. The E1 and E2 signals received were displayed and logged in the normal RoxMap Scientific software environment. The vessel speed during collection was approximately 4 kts. Simultaneous to collection of the acoustic data a towed video sled was deployed astern of the ship. The picture from this video was displayed in the lab within view of the RoxAnn data analyst. This allowed a near real-time reference for the acoustic data. This ground-truth was used to assign the RoxAnn soundings into several bottom classes. At the conclusion of each transect run. The instrument was shut off until the next transect was visited.
      Process_Date: 200104
      Process_Contact:
        Contact_Information:
          Contact_Organization_Primary:
            Contact_Organization: NOAA Coastal Services Center
          Contact_Address:
            Address_Type: mailing and physical
            Address: 2234 South Hobson Avenue
            City: Charleston
            State_or_Province: South Carolina
            Postal_Code: 20405
            Country: USA
          Contact_Voice_Telephone: (843) 740-1264
          Contact_Facsimile_Telephone: (843) 740-1289
          Contact_Electronic_Mail_Address: clearinghouse@noaa.gov
          Hours_of_Service: 08:00 - 17:00 EST
    Process_Step:
      Process_Description: The full RoxAnn record collected during the April cruise was exported from the RoxMap environment and converted into ESRI shapefile format for further analysis. A set of tools developed at CSC specifically for cleaning RoxAnn data were used to remove noise and anomalous points from the record. These points included spikes and pits in the bathymetry as well as bad data caused by surface turbulence. Each bottom class in the data was then exported individually and displayed on a scatterplot of E1 vs. E2 values to examine its geometry. The cluster means (E1 and E2) for each class were also displayed relative to each other as a logical check between classes. The final results were recoded into the Florida SCHEME benthic habitat classification system to ensure consistency with other CSC benthic data.
      Process_Date: 20031201
      Process_Contact:
        Contact_Information:
          Contact_Organization_Primary:
            Contact_Organization: NOAA Coastal Services Center
          Contact_Address:
            Address_Type: mailing and physical
            Address: 2234 South Hobson Avenue
            City: Charleston
            State_or_Province: South Carolina
            Postal_Code: 20405
            Country: USA
          Contact_Voice_Telephone: (843) 740-1264
          Contact_Facsimile_Telephone: (843) 740-1289
          Contact_Electronic_Mail_Address: clearinghouse@noaa.gov
          Hours_of_Service: 08:00 - 17:00 EST
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Point
  Point_and_Vector_Object_Information:
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Point
      Point_and_Vector_Object_Count: 25933
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Grid_Coordinate_System:
        Grid_Coordinate_System_Name: Universal Transverse Mercator
        Universal_Transverse_Mercator:
          UTM_Zone_Number: 17
          Transverse_Mercator:
            Scale_Factor_at_Central_Meridian: 0.999600
            Longitude_of_Central_Meridian: -81.000000
            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: 0.0000001
          Ordinate_Resolution: 0.0000001
        Planar_Distance_Units: Unknown
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1983
      Ellipsoid_Name: GRS 80
      Semi-major_Axis: 6378137.0000000
      Denominator_of_Flattening_Ratio: 298.26
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: fl_dt01.dbf
      Entity_Type_Definition: Shapefile Attribute Table
      Entity_Type_Definition_Source: None
    Attribute:
      Attribute_Label: Class
      Attribute_Definition: Unknown
      Attribute_Definition_Source: Unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0
          Range_Domain_Maximum: 30
    Attribute:
      Attribute_Label: Latitude
      Attribute_Definition: Unknown
      Attribute_Definition_Source: Unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 24.52
          Range_Domain_Maximum: 24.7381
    Attribute:
      Attribute_Label: Longitude
      Attribute_Definition: Unknown
      Attribute_Definition_Source: Unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -82.9984
          Range_Domain_Maximum: -82.7639
    Attribute:
      Attribute_Label: Depth
      Attribute_Definition: Unknown
      Attribute_Definition_Source: Unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -35.55
          Range_Domain_Maximum: -5.59
    Attribute:
      Attribute_Label: E1
      Attribute_Definition: Unknown
      Attribute_Definition_Source: Unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.029
          Range_Domain_Maximum: 2.64
    Attribute:
      Attribute_Label: E2
      Attribute_Definition: Unknown
      Attribute_Definition_Source: Unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.02
          Range_Domain_Maximum: 1.289
    Attribute:
      Attribute_Label: Time
      Attribute_Definition: Unknown
      Attribute_Definition_Source: Unknown
      Attribute_Domain_Values:
        Unrepresentable_Domain: Eastern Daylight Time
    Attribute:
      Attribute_Label: Date_
      Attribute_Definition: Unknown
      Attribute_Definition_Source: Unknown
      Attribute_Domain_Values:
        Unrepresentable_Domain: Date
    Attribute:
      Attribute_Label: Scheme
      Attribute_Definition: Unknown
      Attribute_Definition_Source: Unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 3
          Range_Domain_Maximum: 342
    Attribute:
      Attribute_Label: Modifier
      Attribute_Definition: Unknown
      Attribute_Definition_Source: Unknown
      Attribute_Domain_Values:
        Unrepresentable_Domain: SCHEME Modifier
    Attribute:
      Attribute_Label: Habitat
      Attribute_Definition: Unknown
      Attribute_Definition_Source: Unknown
      Attribute_Domain_Values:
        Unrepresentable_Domain: Habitat Description
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: NOAA Coastal Services Center
      Contact_Position: Clearinghouse Manager
      Contact_Address:
        Address_Type: mailing and physical
        Address: 2234 South Hobson Avenue
        City: Charleston
        State_or_Province: South Carolina
        Postal_Code: 29405
        Country: USA
      Contact_Voice_Telephone: (843) 740-1264
      Contact_Facsimile_Telephone: (843 740-1289
      Contact_Electronic_Mail_Address: clearinghouse@noaa.gov
      Hours_of_Service: 08:00 - 17:00 EST
  Resource_Description: Downloadable Data
  Distribution_Liability: Single-beam acoustic data points collected in the Dry Tortugas area of Florida.  While every effort has been made to ensure that these data are accurate and reliable within limits of the state of the art, NOAA will not assume any liability for damages caused by any inaccuracies in these data, or failure in their use.
Metadata_Reference_Information:
  Metadata_Date: 20100519
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: NOAA Coastal Services Center
      Contact_Position: Metadata Specialist
      Contact_Address:
        Address_Type: mailing and physical
        Address: 2234 South Hobson Avenue
        City: Charleston
        State_or_Province: South Carolina
        Postal_Code: 29405
        Country: USA
      Contact_Voice_Telephone: (843) 740-1210
      Contact_Electronic_Mail_Address: clearinghouse@noaa.gov
      Hours_of_Service: 08:00 - 17:00 EST
  Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
  Metadata_Extensions:
    Online_Linkage: http://www.ncddc.noaa.gov/metadataresource/metadata-references/files/ncddcmdprofile_v2.pdf
    Profile_Name: Content Specification for Metadata in the National Coastal Data Development Center's Data Catalog Version 2.0
