Identification_Information:
  Citation:
    Citation_Information:
      Originator:
        David Fitterman

        Maria Deszcz-Pan
      Publication_Date: 2002
      Title: Helicopter Magnetic Data
      Geospatial_Data_Presentation_Form: report
      Series_Information:
        Series_Name: USGS Open-File Report
        Issue_Identification: 02-101
      Publication_Information:
        Publication_Place: Denver, CO
        Publisher: U.S. Geological Survey
      Online_Linkage: http://sofia.usgs.gov/publications/ofr/02-101/data.html
  Description:
    Abstract:
      These helicopter electromagnetic data were flown over a portion of
      Everglades National Park and surrounding areas in south Florida 9-14
      December 1994.  Two versions of the data are provided: the original
      dataset and the corrected dataset.
    Purpose:
      This project addressed the question of determining the location of the
      fresh-water/salt-water interface (FWSWI) in the coastal regions of
      southern Miami-Dade and Monroe counties, synoptic monitoring of
      changes in water quality associated with changes in water management
      practices, and looking for  geophysical evidence of subsurface
      discharges to Florida Bay.

      This project provided basic information needed to create ground-water
      models and test various restoration strategies and their impact on
      ground-water quality.
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 19941209
        Ending_Date: 29941214
    Currentness_Reference: ground condition
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -81.125
      East_Bounding_Coordinate: -80.375
      North_Bounding_Coordinate: 25.6
      South_Bounding_Coordinate: 25.125
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: none
      Theme_Keyword: helicopter electromagnetic data
      Theme_Keyword: hydrology
      Theme_Keyword: mapping
      Theme_Keyword: helicopter electromagnetic data
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: environment
      Theme_Keyword: inlandWaters
      Theme_Keyword: imageryBaseMapsEarthCover
      Theme_Keyword: 007
      Theme_Keyword: 012
      Theme_Keyword: 011
    Place:
      Place_Keyword_Thesaurus:
        Department of Commerce, 1995, Countries, Dependencies, Areas of
        Special Sovereignty, and Their Principal Administrative Divisions, 
        Federal Information Processing Standard (FIPS) 10-4, Washington, DC,
        National Institute of Standards and Technology
      Place_Keyword: United States
      Place_Keyword: US
    Place:
      Place_Keyword_Thesaurus:
        U.S. Department of Commerce, 1987, Codes for the identification of
        the States, the District of Columbia and the outlying areas of the
        United States, and associated areas (Federal Information Processing
        Standard 5-2): Washington, DC, NIST
      Place_Keyword: Florida
      Place_Keyword: FL
    Place:
      Place_Keyword_Thesaurus:
        Department of Commerce, 1990, Counties and Equivalent Entities of
        the United States, Its Possessions, and Associated Areas, FIPS 6-3,
        Washington, DC, National Institute of Standards and Technology
      Place_Keyword: Miami-Dade County
      Place_Keyword: Monroe County
    Place:
      Place_Keyword_Thesaurus: USGS Geographic Names Information System
      Place_Keyword: Everglades National Park
    Place:
      Place_Keyword_Thesaurus: none
      Place_Keyword: Central Everglades
  Access_Constraints: none
  Use_Constraints: none
  Point_of_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: David Fitterman
        Contact_Organization: U.S. Geological Survey
      Contact_Position: Project Chief
      Contact_Address:
        Address_Type: mailing address
        Address:
          P. O. Box 25046

          Denver Federal Center MS 964
        City: Denver
        State_or_Province: CO
        Postal_Code: 80225
        Country: USA
      Contact_Voice_Telephone: 303 236-1382
      Contact_Facsimile_Telephone: 303 236-1425
      Contact_Electronic_Mail_Address: fitter@usgs.gov
  Browse_Graphic:
    Browse_Graphic_File_Name: http://sofia.usgs.gov/publications/ofr/02-101/diglocmapx.gif
    Browse_Graphic_File_Description: area covered by the Dighem helicopter electromagnetic survey
    Browse_Graphic_File_Type: GIF
  Data_Set_Credit:
    The U.S. Geological Survey contracted with Dighem, then a division of
    CGG Canada, Ltd, of Mississauga, Ontario, Canada, to fly a helicopter
    electromagnetic survey over parts of Everglades National Park and
    surrounding areas of south Florida.
  Native_Data_Set_Environment: ASCII text files
  Cross_Reference:
    Citation_Information:
      Originator:
        Fitterman, David V.

        Deszcz-Pan, Maria; Stoddard, Carl E.
      Publication_Date: 1999
      Title:
        Results of Time-Domain Electromagnetic Soundings in Everglades
        National Park, Florida
      Geospatial_Data_Presentation_Form: report
      Series_Information:
        Series_Name: USGS Open-File Report
        Issue_Identification: 99-426
      Publication_Information:
        Publication_Place: Reston, VA
        Publisher: U.S. Geological Survey
      Online_Linkage: http://sofia.usgs.gov/publications/ofr/99-426/
  Cross_Reference:
    Citation_Information:
      Originator:
        Deszcz-Pan, M.

        Fitterman, D. V., Lason, V. F.
      Publication_Date: 1998
      Title:
        Reduction of inversion errors in helicopter EM data using auxiliary
        information
      Geospatial_Data_Presentation_Form: report
      Series_Information:
        Series_Name: Exploration Geophysics
        Issue_Identification: v. 29
      Publication_Information:
        Publication_Place: Tulsa, OK
        Publisher: Society of Exploration Geophysicists
Data_Quality_Information:
  Logical_Consistency_Report:
    During the interpretation of the datset provided by Dighem, errors in
    the data became apparent which caused difficulties in obtaining reliable
    layered-earth inversion models.  These errors were traced to problems
    with calibration and with the bird tow-cable length.  Calibration errors
    were corrected using a procedure described in Deszcz-Pan et al, 1998.
  Completeness_Report: unknown
  Lineage:
    Process_Step:
      Process_Description:
        During 9-14 December 1994 a helicopter electromagnetic survey was
        flown by Dighem, Mississauga, Ontario, Canada, over parts of
        Everglades National Park and surrounding areas in south Florida. 
        The survey covered 398 square miles (1031 sq. Km) with flightlines
        totaling 1718 miles (2765 km).  The data were collected towards the
        end of the wet season.
      Process_Date: 1994
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: David Fitterman
            Contact_Organization: U.S. Geological Survey
          Contact_Position: Project Chief
          Contact_Address:
            Address_Type: mailing address
            Address:
              P. O. Box 25046

              Denver Federal Center MS 964
            City: Denver
            State_or_Province: CO
            Postal_Code: 80225
            Country: USA
          Contact_Voice_Telephone: 303 236-1382
          Contact_Facsimile_Telephone: 303 236-1425
          Contact_Electronic_Mail_Address: fitter@usgs.gov
    Process_Step:
      Process_Description:
        Errors discovered in the original data due to problems with
        calibration and with the bird tow-cable length were corrected.  See
        the section "Additional Corrections Applied to Original Data Set" in
        Fitterman David V. And Deszcz-Pan, Maria, 2002, Helicopter
        Electromagnetic Data from Everglades National park and Surrounding
        Areas, Florida: Collected 9-14, December, 1994, OFR 02-101 for more
        information on the correction procedures.
      Process_Date: Unknown
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Maria Deszcz-Pan
            Contact_Organization: U.S. Geological Survey
          Contact_Address:
            Address_Type: mailing address
            Address:
              Box 25046

              Denver Federal Center, MS 964
            City: Denver
            State_or_Province: CO
            Postal_Code: 80225-0046
            Country: USA
          Contact_Voice_Telephone: 303 236-1317
          Contact_Electronic_Mail_Address: maryla@usgs.gov
Spatial_Data_Organization_Information:
  Indirect_Spatial_Reference: Everglades National Park
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: 0.9996
            Longitude_of_Central_Meridian: -81
            Latitude_of_Projection_Origin: 0
            False_Easting: 500000
            False_Northing: 0
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: Coordinate Pair
        Coordinate_Representation:
          Abscissa_Resolution: 0.1
          Ordinate_Resolution: 0.1
        Planar_Distance_Units: meters
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1983
      Ellipsoid_Name: Geodetic Reference System 80
      Semi-major_Axis: 6378137
      Denominator_of_Flattening_Ratio: 298.257
Entity_and_Attribute_Information:
  Overview_Description:
    Entity_and_Attribute_Overview:
      For a description of the channels in the original dataset see Table 3
      (http://sofia.usgs.gov/publications/ofr/02-101/table3.html.

      For a description of the channels in the corrected dataset see Table 4
      (http://sofia.usgs.gov/publications/ofr/02-101/table4.html)
    Entity_and_Attribute_Detail_Citation: USGS personnel
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Heather S.Henkel
        Contact_Organization: U.S. Geological Survey
      Contact_Address:
        Address_Type: mailing address
        Address: 600 Fourth St. South
        City: St. Petersburg
        State_or_Province: FL
        Postal_Code: 33701
        Country: USA
      Contact_Voice_Telephone: 727 803-8747 ext 3028
      Contact_Facsimile_Telephone: 727 803-2030
      Contact_Electronic_Mail_Address: hhenkel@usgs.gov
  Resource_Description: helicopter electromagnetic data
  Distribution_Liability: The data have no guarantees explicit or implied
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: ASCII
        Format_Information_Content:
          There are two versions of the dataset.  The original dataset and a
          corrected dataset
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://sofia.usgs.gov/publications/ofr/02-101/data.html
          Access_Instructions: Data may be downloaded from the SOFIA website
    Fees: none
Metadata_Reference_Information:
  Metadata_Date: 20070525
  Metadata_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Heather Henkel
        Contact_Organization: U.S. Geological Survey
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 600 Fourth Street South
        City: St. Petersburg
        State_or_Province: FL
        Postal_Code: 33701
        Country: USA
      Contact_Voice_Telephone: 727 803-8747 ext 3028
      Contact_Facsimile_Telephone: 727 803-2030
      Contact_Electronic_Mail_Address: sofia-metadata@usgs.gov
  Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998