Identification_Information:
  Citation:
    Citation_Information:
      Originator: U.S. Geological Survey
      Originator: NOAA Coastal Services Center
      Publication_Date: 2007
      Title: Bathymetric ArcRaster Grid of Apalachicola Bay and St. George Sound, Florida (25m)
      Edition: 1.0
      Geospatial_Data_Presentation_Form: raster digital data
      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/
      Online_Linkage: http://www.csc.noaa.gov/digitalcoast/data/elevation/
      Online_Linkage: http://www.csc.noaa.gov/
      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 Apalachicola Bay and Western St. George Sound portions of the estuary mostly in depths > 2.0 meters.
    Purpose:
      The purpose of this dataset is to produce a bathymetric grid  of the area within the survey boundary in St. George Sound and Apalachicola Bay. 

      The purpose of these data is to represent the swath bathymetry in a courser grid cell resolution but cover the gaps between survey lines. In shallow areas less than 2m deep the digitized seafloor from the ASV seismic data was used to provide single beam bathymetry.
    Supplemental_Information: These data are a bathymetric grid of Apalachicola Bay and St. George Sound generated from swath sounding gridded at 5m.  Refer to processing steps under data quality section for detailed methods.
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 20050314,20060529
        Ending_Date: 20050413,20060627
    Currentness_Reference: ground condition
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -85.096558
      East_Bounding_Coordinate: -84.753126
      North_Bounding_Coordinate: 29.789051
      South_Bounding_Coordinate: 29.597035
  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: ArcGIS Raster
      Theme_Keyword: field activity serial number 05001
      Theme_Keyword: field activity serial number 06001
      Theme_Keyword: Swath Bathymetry
      Theme_Keyword: Interferometric Sonar
      Theme_Keyword: seafloor mapping
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: oceans and estuaries
      Theme_Keyword: elevation
    Place:
      Place_Keyword_Thesaurus: General
      Place_Keyword: Apalachicola Bay
      Place_Keyword: Florida
      Place_Keyword: Apalachicola National Estuarine Research Reserve
      Place_Keyword: St. George Sound
      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/apbaybath25m.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:
    Soundings were gridded in OMG SwathEd software using the entire swath width across track to achieve maximum coverage at the scale of the entire Apalachicola Bay/St. George Sound survey area. Although the soundings were manually edited, small data spikes may exist at outer edges of some swaths.

    Pockmark features that appear in the dredge channel of the intracoastal waterway fairways are artifacts of the processing methods used to generate a continuous surface from swath bathymetry collected on lines spaced 100m apart.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: DGPS is assumed to be accurate within 1-2 meters. Standard GPS is assumed accurate within 5-10 meters. 99% of the positional data is DGPS. Unless noted, all GPS/DGPS data is referenced to WGS84 (NAD83). The configuration of the fathometer is as follows: the transducer on the RAFAEL was mounted on a pole at the vessel's bow. Offset between the bow mount and GPS antenna is measured. On ASV IRIS, the subbottom profiler used to measure water depth was mounted directly below the GPS antenna.  No measurements were taken of ship's pitch, yaw, heave, or change in draft due to water and fuel usage. Motion of the fathometer is not measured. Horizontal accuracy of the fathometer is assumed to be within +/- 3 meters.
    Vertical_Positional_Accuracy:
      Vertical_Positional_Accuracy_Report:
        Ship motion was recorded with a TSS DMS 2-05 Attitude Sensor, mounted on a head above the interferometric Submetrix 2000 Series transducers. Navigation was recorded using Real Time Kinematic Differential Global Positioning System (RTK-DGPS). The interferometric sonar is an angle-measuring system; depth accuracy decreases with increasing horizontal range. The combined angular accuracy of the Submetrix 2000 Series and the TSS DMS 2-05 attitude sensor is documented as 0.1 degrees. Assuming a constant angular accuracy, and using the International Hydrographic Standard (IHO) of a required 0.3 meter accuracy in < 30 meter water depth, all data collected within the survey fall within the IHO accuracy standards. However, vertical accuracy is also directly affected by the accuracy of both the navigation system and tidal measurements. RTK DGPS vertical accuracy is assumed to be 0.2 meters. Tidal elevations were derived from RTK -DGPS heights sent from a survey-specific base station located on St. George Island.

        The base station occupied a temporary monument. The x & y positions were calculated for that location using a 3 day average of 12 hour data sets using the Online Positioning User Service (OPUS, National Geodetic Survey) solution.  Tidal elevations were calculated from NOAA Tidal Station #8728690 using the same OPUS solution and then applied to the corrected elevations for the base station at St. George Island.  Antenna heights were referenced to Mean Lower Low Water (MLLW) for easier comparison of NOAA nautical charts.
  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: 200610
      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 step 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: 200610
      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: 200610
      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 to allow usage of bathymetry data points from a broader section of the 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: 200610
      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 soundings were gridded to a 5m grid cell resolution using SwathEd weigh_grid command and the following gridding parameters:

        weigh_grid -omg -coeffs -butter -power 2 -lambda 1 -cutoff 4 -max_incidence 60

        A 5m grid cell size reduced the number of points and a max_incidence of 60 degrees was used to remove the outer soundings which tended to be noisy.
      Process_Date: 200610
      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 final grid in SwathEd OMG format was imported directly into IVS DMagic software producing a .geo, .dtm, and .shade file. The dtm file was exported to an x,y,z comma delimited file.
      Process_Date: 200610
      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 comma-delimited x,y,z file of bathymetry was added to ArcMap as an event theme and converted to a point feature class. Two separate x,y,z files and feature classes were processed; one for Apalachicola Bay, and one for St. George Sound.
      Process_Date: 200610
      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
    Process_Step:
      Process_Description:
        The remaining geoprocessing steps were completed using one model developed in ArcGIS Modelbuilder. The Model is included in the geodatabase distributed with the Open-File Report. Each of the processing steps used to Create the  Model for St. George Sound are described below.  The same processing steps were used to create a second Model for Apalachicola Bay using the same steps.

        Created empty TIN and added the x,y,z points using the geoprocessing history below:

        Create TIN 
        *Date: 20061027 
        *Time: 113410 
        *Tool location: C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\3D Analyst Tools.tbx\CreateTin 
        *Command issued: CreateTin D:\GIS\FL\rafa06001\ArcGIS\Bathy\BathInterp\Tin\StGTin "PROJCS['WGS_1984_UTM_Zone_16N',GEOGCS['GCS_WGS_1984',DATUM['D_WGS_1984',SPHEROID['WGS_1984',6378137.0,298.257223563]],PRIMEM['Greenwich',0.0],UNIT['Degree',0.0174532925199433]],PROJECTION['Transverse_Mercator'],PARAMETER['False_Easting',500000.0],PARAMETER['False_Northing',0.0],PARAMETER['Central_Meridian',-87.0],PARAMETER['Scale_Factor',0.9996],PARAMETER['Latitude_Of_Origin',0.0],UNIT['Meter',1.0]];-10000 -10000 100000;0 100000;0 100000"
      Process_Date: 200610
      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
    Process_Step:
      Process_Description:
        Added 5m xyz points to TIN 

        See geoprocessing history below:

        Process: 
        *Process name: Edit TIN 
        *Date: 20061027 
        *Time: 113535 
        *Tool location: C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\3D Analyst Tools.tbx\EditTin 
        *Command issued: EditTin D:\GIS\FL\rafa06001\ArcGIS\Bathy\BathInterp\Tin\stgtin "StG_5mc_xyz depth masspoints false;BathClip <None> <None> hardclip false" D:\GIS\FL\rafa06001\ArcGIS\Bathy\BathInterp\Tin\stgtin
      Process_Date: 200610
      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
    Process_Step:
      Process_Description: Converted Tin to Raster using Natural Neighbors using floating point and natural neighbors options. Cells size was set at 25m.
      Process_Date: 200701
      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
    Process_Step:
      Process_Description: Output Raster was clipped to a polygon boundary delineating the extent of bathymetric data.
      Process_Date: 200701
      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
    Process_Step:
      Process_Description: The clipped 25m bathymetric grid was smoothed with a 3x3 low-pass filter.
      Process_Date: 200701
      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
    Process_Step:
      Process_Description: Individual 25m smoothed grids of Apalachicola Bay and St. George Sound were merged together to make one grid for both areas.
      Process_Date: 2007
      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: Grid Cell
    Row_Count: 828
    Column_Count: 1315
    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: 25.000000
          Ordinate_Resolution: 25.000000
        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_Resolution: 0.3m
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Attribute values
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: fl_ab06_bath
      Entity_Type_Definition: Bathymetric depths
      Entity_Type_Definition_Source: USGS
    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_Definition: Depth in meters 
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Depth values within the project area   
    Attribute:
      Attribute_Label: Count
      Attribute_Definition: Number of pixels with a given depth value.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Counts of pixels within the data set.     
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: NOAA Coastal Services Center
      Contact_Position: Geographer
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 2234 South Hobson Avenue
        City: Charleston
        State_or_Province: South Carolina
        Postal_Code: 29405
        Country: USA
      Contact_Voice_Telephone: 843-740-1200
  Resource_Description: Downloadable Data
  Distribution_Liability:
    NOAA manages much of the data to users of digital geographic data. NOAA is in no way condoning or endorsing the application of this data for any given purpose.It is the sole responsibility of the user to determine whether or not the data is suitable for the intended purpose. It is also the obligation of the user to apply the data in an appropriate and conscientious manner.NOAA provides no warranty,nor accepts any liability occurring from any incomplete,incorrect, or misleading data, or from any incorrect,incomplete, or misleading use of the data. Much of the data is based on and maintained with ARC/GIS software developed by the Environmental Systems Research Institute (ESRI).In addition, much of the information presented uses conventions and terms popularized by ARC/GISand its user community.NOAA in no way represents the interests of ESRI,nor acts as agents for them. 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: ESRI Grid
        Format_Version_Number: ArcGIS 9.2
        Format_Specification: ESRI Grid File
        Format_Information_Content: ArcRaster grid containing swath bathymetric data collected in the Apalachicola Bay and St. George Sound Florida
        File_Decompression_Technique: zip
        Transfer_Size: 4.994
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://pubs.usgs.gov/of/2006/1381/GIS/raster/bath/apbaybath25m.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
    Fees: None
  Technical_Prerequisites: These data are available as a 32 bit floating point ArcRaster grid in Environmental Systems Research Institute (ESRI) format. To utilize these data, the user must have an image viewer, image processing or ESRI software capable of importing and ESRI raster.
Metadata_Reference_Information:
  Metadata_Date: 20070827
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: NOAA Coastal Services Center
      Contact_Position: Clearinghouse Manager
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 2234 South Hobson Avenue
        City: Charleston
        State_or_Province: SC
        Postal_Code: 29405
        Country: USA
      Contact_Voice_Telephone: 843-740-1200
      Contact_Facsimile_Telephone: 843-740-1245
      Contact_Electronic_Mail_Address: clearinghouse@noaa.gov 
  Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
