Identification_Information:
  Citation:
    Citation_Information:
      Originator: USDA-FSA-APFO
      Publication_Date: 20161025
      Title: USDA-FSA-APFO Digital Ortho Mosaic
      Publication_Information:
        Publication_Place: Salt Lake City, Utah
        Publisher: USDA_FSA_APFO Aerial Photography Field Office
  Description:
    Abstract:
      This data set contains imagery from the National
      Agriculture Imagery Program (NAIP).  The NAIP
      acquires digital ortho imagery during the
      agricultural growing seasons in the continental U.S..
      A primary goal of the NAIP program is to enable
      availability of ortho imagery within one year of
      acquisition.  The NAIP provides two main products: 1
      meter ground sample distance (GSD) ortho imagery
      rectified to a horizontal accuracy within +/- 5 meters
      of reference digital ortho quarter quads (DOQQ's) from
      the National Digital Ortho Program (NDOP) or from the
      National Agriculture Imagery Program (NAIP); 1 meter
      or 1/2 meter GSD ortho imagery rectified within +/- 6
      meters to true ground.  The tiling format of NAIP imagery is
      based on a 3.75' x 3.75' quarter quadrangle with a 300
      pixel buffer on all four sides.  The NAIP imagery is
      formatted to the UTM coordinate system using the North
      American Datum of 1983 (NAD83).  The NAIP imagery may
      contain as much as 10% cloud cover per tile.  This file
      was generated by compressing NAIP imagery that covers
      the county extent.  Two types of compression may be
      used for NAIP imagery: MrSID and JPEG 2000. The target
      value for the compression ratio is 15:1 for the 1 meter
      imagery and 60:1 for the 1/2 meter imagery.
    Purpose:
      The NAIP imagery is typically available for distribution
      within 60 days of the end of a flying season and is intended
      to provide current information of agricultural conditions
      in support of USDA farm programs. For USDA Farm Service
      Agency, the 1 meter and 1/2 meter GSD product provides an
      ortho image base for Common Land Unit boundaries and other
      data sets.  The NAIP imagery is generally acquired in
      projects covering full states in cooperation with state
      government and other federal agencies who use the
      imagery for a variety of purposes including land use
      planning and natural resource assessment.  The NAIP is
      also used for disaster response often providing the most
      current pre-event imagery.
  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 20160823
    Currentness_Reference: Photography Source Image Dates.
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: Irregular
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -80.6913520366591
      East_Bounding_Coordinate: -80.4959539429212
      North_Bounding_Coordinate: 40.69047222036
      South_Bounding_Coordinate: 40.3720218368719
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: farming
      Theme_Keyword: Digital Ortho Rectified Image
      Theme_Keyword: Mosaic
      Theme_Keyword: Quarter Quadrangle
      Theme_Keyword: Ortho Rectification
      Theme_Keyword: Compression
      Theme_Keyword: MrSID
      Theme_Keyword: JPEG 2000
      Theme_Keyword: NAIP
      Theme_Keyword: Compliance
      Theme_Keyword: Aerial Compliance
    Place:
      Place_Keyword_Thesaurus: Geographic Names Information System
      Place_Keyword: HANCOCK CO., WV
      Place_Keyword: FIPS 54029
      Place_Keyword: Hancock
      Place_Keyword: WV
  Access_Constraints: There are no limitations for access.
  Use_Constraints:
    None, The USDA-FSA Aerial Photography Field Office asks to
    be credited in derived products.
    If defects are found in the NAIP imagery during the 1 year
    warranty period such as horizontal offsets, replacement imagery
    may be provided. Imagery containing defects that require the
    acquisition of new imagery, such as excessive cloud cover,
    specular reflectance, etc., will not be replaced within a
    NAIP project year.
  Point_of_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: USDA-FSA Aerial Photography Field Office
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 2222 West 2300 South
        City: Salt Lake City
        State_or_Province: Utah
        Postal_Code: 84119-2020
        Country: USA
      Contact_Voice_Telephone: 801-844-2922
      Contact_Facsimile_Telephone: 801-956-3653
      Contact_Electronic_Mail_Address: apfo.sales@slc.usda.gov
  Browse_Graphic:
    Browse_Graphic_File_Name: None
    Browse_Graphic_File_Description: None
    Browse_Graphic_File_Type: None
  Native_Data_Set_Environment:
    NAIP 3.75 Quarter Quadrangles mosaicked into a County format
    using data compression software.  The target values for the
    compression ratio are 15:1 for the 1 meter imagery and 60:1
    for the 1/2 meter imagery.
Data_Quality_Information:
  Logical_Consistency_Report:
    NAIP 3.75 minute tile file names are based
    on the USGS quadrangle naming convention.
  Completeness_Report: None
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: NAIP Specifications
    Vertical_Positional_Accuracy:
      Vertical_Positional_Accuracy_Report: N/A  2d only
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: USDA-FSA Aerial Photography Field Office
          Publication_Date: 20161025
          Title: HANCOCK CO, WV
      Source_Scale_Denominator: 12000
      Type_of_Source_Media: External Media Types
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
              Calendar_Date: 20160823
        Source_Currentness_Reference: Majority Aerial Photography Date
      Source_Citation_Abbreviation: MrSID Compressed Image
      Source_Contribution: Mosaicked County Image
    Process_Step:
      Process_Description: 
        The imagery was collected using the following digital sensors:
        Leica ADS-100 (Serial Number 10519)
        Leica ADS-100 (Serial Number 10541)
        Leica ADS-100 (Serial Number 10542)
        Leica ADS-100 (Serial Number 10547)
        with Flight and Sensor Control Management 
        System (FCMS) firmware 4.54. 
        Cameras are calibrated radiometrically and geometrically
        by the manufacturer and are all certified by the USGS.
        Collection was performed using a combination of the 
        following twin-engine aircraft: 
        Turbines flying at 16,500 ft above mean terrain 
        (tail number: AC90 N167R)
        (tail number: AC90 N910FC)
        (tail number: C441 N441CJ)
        (tail number: PA31 N3547G)
        (tail number: PA31 N4012J)
        (tail number: PA31 N73TM)
        (tail number: PA31 N35834)
        With these flying heights, there is a 23% sidelap, 
        giving the collected data nominal ground sampling distance 
        of 0.40 meters at 16,500. 
        Based-upon the CCD Array configuration present in 
        the ADS digital sensor, imagery for each flight 
        line is 20,000-pixels in width.  Red, Green, Blue, 
        Near-Infrared and Panchromatic image bands were collected.
        
        The ADS 100 has the following band specifications:
        Red 619-651
        Green 525-585
        Blue 435-495
        Near Infrared 808-882
        all values are in nanometers
        
        Collected data was downloaded to portable hard drives and
        shipped to the processing facility daily.  Raw flight data
        was extracted from external data drives using XPro software.
        Airborne GPS / IMU data was post-processed using INYS,
        PosPac and/or TerraPos software and reviewed to ensure
        sufficient accuracy for project requirements.
        
        Using Inpho software, planar rectified images were
        generated from the collected data for use in image quality
        review.  The planar rectified images were generated at five
        meter resolution using a two standard deviation histogram
        stretch.  Factors considered during this review included but
        were not limited to the presence of smoke and/or cloud
        cover, contrails, light conditions, sun glint and any sensor
        or hardware-related issues that potentially could result in
        faulty data.  When necessary, image strips identified as not
        meeting image quality specifications were re-flown to obtain
        suitable imagery.
        
        Aero triangulation blocks were defined primarily by order of
        acquisition and consisted of four to seventeen strips.
        Image tie points providing the observations for the least
        squares bundle adjustment were selected from the images
        using an auto correlation algorithm. Photogrammetric control
        points consisted of photo identifiable control points,
        collected using GPS field survey techniques.  The control
        points were loaded in to a softcopy workstation and measured
        in the acquired image strips.  A least squares bundle
        adjustment of image pass points, control points and the
        ABGPS was performed to develop an aero triangulation
        solution for each block using Pictovera software.
        
        Upon final bundle adjustment, the triangulated strips were
        ortho-rectified to the digital elevation model (DEM) The most
        recent USGS 10 meter DEMs were used in the rectification
        process.
        
        Positional accuracy was reviewed in the rectified imagery by
        visually verifying the horizontal positioning of the known
        photo-identifiable survey locations using ArcGIS software.
        
        The red, green, blue, and infrared bands were combined to 
        generate a final ortho-rectified image strip. The ADS sensor 
        collects twelve bit image data which requires radiometric 
        adjustment for output in standard eight bit image channels.
        The ortho-rectified image strips were produced with the 
        full 12 bit data range, allowing radiometric adjustment 
        to 8 bit range to be performed on a strip by strip basis 
        during the final mosaicking steps.
        
        The 12 bit data range was adjusted for display in standard
        eight bit image channels by defining a piecewise histogram
        stretch using OrthoVista Radiometrix software.  A constant
        stretch was defined for each image collection period, and
        then strip by strip adjustments were made as needed to
        account for changes in sun angle and azimuth during the
        collection period.  Strip adjustments were also made to 
        match the strips histograms as closely as possible to 
        APFO specified histogram metrics and color balance 
        requirements. Automated balancing algorithms were applied 
        to account for bi- directional reflectance as a final step
        before the conversion to 8 bit data range.  The imagery was
        mosaicked using manual seam line generation in OrthoVista.
        
        APFO specified DOQQs were extracted from the final mosaic in
        GeoTIFF format. 4-Band DOQQs were produced and 3-Band RGB
        CCMs were created.  DOQQs corresponding to an individual CCM
        were reviewed for overall color balance within the CCM.
        Local corrections were made where necessary to ensure
        uniformity within the CCM.  In the case of DOQQs occurring
        in more than one CCM, a separate version of the image was
        generated and balanced for each CCM it occurred in. The
        color balanced DOQQs were then compressed to MrSID
        Generation 3 format at 15:1 compression ratio to create a
        composite CCM.
      Process_Date: 20161025
Spatial_Data_Organization_Information:
  Indirect_Spatial_Reference: HANCOCK CO., WV ortho_1-1_1n_s_wv029_2016_1
  Direct_Spatial_Reference_Method: Raster
  Raster_Object_Information:
    Raster_Object_Type: Pixel
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: 0.0
            False_Easting: 500000
            False_Northing: 0.0
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: row and column
        Coordinate_Representation:
          Abscissa_Resolution: 1.000000
          Ordinate_Resolution: 1.000000
        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: ortho_1-1_1n_s_wv029_2016_1
    Entity_and_Attribute_Detail_Citation: None
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Supervisor Customer Services Section
        Contact_Organization: USDA-FSA Aerial Photography Field Office
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 2222 West 2300 South
        City: Salt Lake City
        State_or_Province: Utah
        Postal_Code: 84119-2020
        Country: USA
      Contact_Voice_Telephone: 801-844-2922
      Contact_Facsimile_Telephone: 801-956-3653
      Contact_Electronic_Mail_Address: apfo.sales@slc.usda.gov
  Distribution_Liability:
    In no event shall the creators, custodians, or distributors
    of this information be liable for any damages arising out
    of its use (or the inability to use it).
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: Compressed County Mosaic
        Format_Information_Content: Natural Color
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: None
        Offline_Option:
          Offline_Media: DVD-R
          Recording_Format: ISO 9660
        Offline_Option:
          Offline_Media: USB Hard Disk
          Recording_Format: NTFS
        Offline_Option:
          Offline_Media: FireWire Hard Disk
          Recording_Format: NTFS
        Offline_Option:
          Offline_Media: Flash drive
          Recording_Format: Fat32 or NTFS
    Fees:
      Contact the Aerial Photography Field Office
      for more information
  Resource_Description: Mosaicked County Image for Hancock, WV FIPS 54029
Metadata_Reference_Information:
  Metadata_Date: 20161025
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: USDA-FSA Aerial Photography Field Office
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 2222 West 2300 South
        City: Salt Lake City
        State_or_Province: Utah
        Postal_Code: 84119-2020
        Country: USA
      Contact_Voice_Telephone: 801-844-2900
  Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998

