m_3008601_ne_16_1_20150804.txt

Metadata:
  Identification_Information:
    Citation:
      Citation_Information:
        Originator: USDA-FSA-APFO Aerial Photography Field Office
        Publication_Date: 20151125
        Title: NAIP Digital Ortho Photo Image
        Geospatial_Data_Presentation_Form: remote-sensing image
        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 program is administered by
        USDA FSA and has been established to support two main FSA
        strategic goals centered on agricultural production.
        These are, increase stewardship of America's natural resources
        while enhancing the environment, and to ensure commodities
        are procured and distributed effectively and efficiently to
        increase food security.  The NAIP program supports these goals by
        acquiring and providing ortho imagery that has been collected
        during the agricultural growing season in the U.S. The NAIP
        ortho imagery is tailored to meet FSA requirements and is a
        fundamental tool used to support FSA farm and conservation
        programs.  Ortho imagery provides an effective, intuitive
        means of communication about farm program administration
        between FSA and stakeholders.  
        New technology and innovation is identified by fostering and
        maintaining a relationship with vendors and government
        partners, and by keeping pace with the broader geospatial
        community.  As a result of these efforts the NAIP program
        provides three main products: DOQQ tiles,
        Compressed County Mosaics (CCM), and Seamline shape files
        The Contract specifications for NAIP imagery have changed
        over time reflecting agency requirements and improving
        technologies.  These changes include image resolution,
        horizontal accuracy, coverage area, and number of bands.
        In general, flying seasons are established by FSA and are
        targeted for peak crop growing conditions.  The NAIP
        acquisition cycle is based on a minimum 3 year refresh of base
        ortho imagery.  The tiling format of the NAIP imagery is based
        on a 3.75' x 3.75' quarter quadrangle with a 300 pixel buffer
        on all four sides.  NAIP quarter quads are formatted to the UTM
        coordinate system using the North American Datum of 1983.
        NAIP imagery may contain as much as 10% cloud cover per tile.
      Purpose:
        NAIP imagery is 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 1 meter and 1/2 meter NAIP
        imagery is generally acquired in projects covering full states in
        cooperation with state government and other federal agencies that
        use the imagery for a variety of purposes including land use
        planning and natural resource assessment.  The NAIP is also used 
        for disaster response.  While suitable for a variety of uses,
        prior to 2007 the 2 meter GSD NAIP imagery was primarily intended
        to assess "crop condition and compliance" to USDA farm program
        conditions. The 2 meter imagery was generally acquired only
        for agricultural areas within state projects.
    Time_Period_of_Content:
      Time_Period_Information:
           Single_Date/Time:
             Calendar_Date: 20150804
      Currentness_Reference: Ground Condition
    Status:
      Progress: Complete
      Maintenance_and_Update_Frequency: Irregular
    Spatial_Domain:
      Bounding_Coordinates:
        West_Bounding_Coordinate:  -86.9375
        East_Bounding_Coordinate:  -86.8750
        North_Bounding_Coordinate:  31.0000
        South_Bounding_Coordinate:  30.9375
    Keywords:
      Theme:
        Theme_Keyword_Thesaurus: None
        Theme_Keyword: farming
        Theme_Keyword: Digital Ortho rectified Image
        Theme_Keyword: Ortho Rectification
        Theme_Keyword: Quarter Quadrangle
        Theme_Keyword: NAIP
        Theme_Keyword: Aerial Compliance
        Theme_Keyword: Compliance
      Place:
        Place_Keyword_Thesaurus: Geographic Names Information System
        Place_Keyword: AL
        Place_Keyword: Escambia
        Place_Keyword: 01053
        Place_Keyword: AL053
        Place_Keyword: ESCAMBIA CO AL FSA
        Place_Keyword: 3008601
        Place_Keyword: MCLELLAN, NE
        Place_Keyword: MCLELLAN
    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.
    Point_of_Contact:
      Contact_Information:
        Contact_Organization_Primary:
          Contact_Organization: Aerial Photography Field Office (APFO)
        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: Unknown
  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 horizontal accuracy specifications have evolved over
          the life of the program.  From 2003 to 2004 the
          specifications were as follows: 1-meter GSD imagery was
          to match within 3-meters, and 2-meter GSD to match within 10
          meters of reference imagery.  For 2005 the 1-meter GSD
          specification was changed to 5 meters matching the reference
          imagery.  In 2006 a pilot project was performed using true
          ground specifications rather than reference imagery.  All
          states used the same specifications as 2005 except Utah,
          which required a match of +/- 6 meters to true ground.
          In 2007 all specifications were the same as 2006 except
          Arizona used true ground specifications and all other states
          used reference imagery.  In 2008 and subsequent years
          no 2-meter GSD imagery was acquired and all specifications
          were the same as 2007 except approximately half of the
          states acquired used true ground specifications and the
          other half used reference imagery.  The 2008 states that
          used absolute ground control where; Indiana, Minnesota,
          New Hampshire, North Carolina, Texas, Vermont, and Virginia.
          From 2009 to present all NAIP imagery acquisitions used
          the +/- 6 meters to ground specification.
    Lineage:
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: USDA-FSA-APFO Aerial Photography Field Office
            Publication_Date: 20151125
            Title: MCLELLAN, NE
            Geospatial_Data_Presentation_Form: remote-sensing image
        Type_of_Source_Media: UnKnown
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 20150804
          Source_Currentness_Reference:
            Aerial Photography Date for aerial photo source.
        Source_Citation_Abbreviation: Georectifed Image
        Source_Contribution: Digital Georectifed Image.

      Process_Step:
        Process_Description:
          Flight planning was performed in Leica MissionPro over a 
          buffered boundary covering DOQQ extents provided by the USDA. 
          A 500m reduced resolution DEM file was used to determine 
          ground heights. A targeted flight altitude of approximately 
          18,000 feet above ground level with sidelap of 27% was used 
          for flight planning parameters. Five Cessna Conquests and 
          a Cessna 414 were utilized for acquisition, the seamline 
          shapefile clarifies which aircraft were used for a given area. 
          All aircraft were equipped with Leica 
          ADS100 systems where utilized for data 
          capture. The Leica ADS100 pushbroom sensor 
          has been calibrated by the manufacturer as well as validated 
          against a local calibration range.  The calibration includes 
          measuring the radiometric and geometric properties of the 
          camera.  These data are used in the Post Processing Software 
          to eliminate the radiometric and geometric distortion.     
          All aerial imagery was collected with associated GPS/IMU  
          data.  ADS collection requires high quality IMU data for 
          processing and was critical for early access hosting of digital 
          data to the web for USDA interim access and review. 
          After early access web delivery was complete, all 
          imagery was triangulated using Leica XPro in which 
          the airborne GPS data was constrained to expected limits.  
          The final adjustments assure a high quality relative adjustment 
          and a high quality absolute adjustment limited to the 
          airborne GPS data accuracy. This process assures the final 
          absolute accuracy of all geopositioned imagery.  Both 
          signalized and photo identified 
          ground control were used to QC and control the IMU/GPS 
          based aerial triangulation bundle block solution.  For each 
          project area the latest NED was downloaded from the USGS 
          National Map Seamless Server website in late Spring-Summer
          2015.  Thirty Meter NED was used in all cases, and preferred 
          over the available ten meter spacing to minimize image 
          smearing and distortions that are exacerbated 
          by a finer, but not more accurate DEM.  A visual inspection 
          of the NED using color cycled 
          classification by elevation and a shaded relief was performed 
          to check for gaps, corruption and gross errors.  When available 
          the NED was compared to known higher quality elevation sources 
          to detect flaws. The predicted horizontal error for each 
          point was added as an attribute in the SURDEX enterprise 
          database.  An operator reviews ortho seams 
          in areas these predicted errors indicate horizontal error in 
          excess of the contract specifications.  Any imagery errors 
          introduced by source NED required patching from an alternate 
          perspective or strip of photography.  
          Processing hardware used included various brands of survey grade 
          GPS receivers, various brands and models of computers, 
          RAID6 storage, calibrated monitors, various brands of monitor 
          calibration colorimeters. Leica XPro was used for post 
          processing of ADS pushbroom data, triangulation and 
          orthorectification.  SURDEX software was used to color correct 
          and remove bidirectional reflectance, vignetting and other 
          illumination trends.  USDA APFO Image Metrics are measured and 
          images corrected to conform to the Image Metrics using 
          SURDEX software.  GPS/IMU data was reduced to projected 
          coordinates in the appropriate UTM zone using 
          Inertial Explorer software from Novatel. Aerial Triangulation 
          and orthorectification was performed using Leica XPro. SURDEX 
          software was used to adjust for minor radiometric 
          variation between adjacent images.  SURDEX software was used 
          to calculate the optimal seam path, check seam topology and 
          create master tiles.  SURDEX ortho software generates 
          occlusion/smear polygons used during seam review 
          of steep terrain.  SURDEX software was used to 
          visually inspect master tiles for seam and image defects.  
          SURDEX software was used to project and cut final DOQQ image 
          files from masters.  SURDEX software was used to create CCM 
          metadata.  Lizardtech GeoExpress version 8.0.0.3065 was used 
          to create the CCM image file.  SURDEX software was 
          used to perform final formatting, QC and naming of the DOQQ.  
          USGS metadata parser software was used to validate the metadata. 
          Various versions of Microsoft Windows were used in all phases of 
          production.  Surdex Grouping Tool provides real-time updates 
          of the USDA APFO Image Metrics.  The image technician adjusts 
          image correction parameters to bring the radiometric 
          characteristics of large groups of images within the Image 
          Metrics ranges.  Grouping Tool was used again after 
          DOQQ and CCM production to 
          provide a quality assurance check.  Individual DOQQ and CCM may 
          not meet the USDA APFO Image Metrics ranges due to land cover.  
          The goal is to have the state as a whole meet the Image Metrics. 
          To validate the accuracy of the block adjustment derived from 
          GPS/IMU, sensor parameters and conjugate point measurements, 
          photo identifiable ground control points 
          were field surveyed within each State.  These points were 
          surveyed using GPS techniques to produce coordinates that are 
          accurate to +/- 0.25 meters RMSE in XYZ.  The GPS surveying 
          techniques utilized assured that the coordinates are derived 
          in the required project datum and relative to an approved 
          National Reference System.  If the block does not fit the 
          control points within specifications the pass and tie 
          points were reviewed for blunders and weak areas.  If, 
          after these corrections were made, the block still 
          does not fit the control well the GPS and IMU processing were 
          reviewed.  Once the block has proper statistics and fits the 
          control to specifications, the final bundle adjustment was 
          made.  As AT points are frequently on man-made and other 
          vertical features not included in the DEM, these ortho 
          points can only be used to indicate regions of error by the 
          clusters of points that predict excessive horizontal 
          displacement.  All products are reviewed by independent 
          personnel prior to delivery.  The delivery is checked for 
          omissions, commissions, naming, formatting, specification 
          compliance and data integrity
        Process_Date: 20151125
  Spatial_Data_Organization_Information:
    Indirect_Spatial_Reference: Escambia County, AL
    Direct_Spatial_Reference_Method: Raster
    Raster_Object_Information:
      Raster_Object_Type: Pixel
      Row_Count: 1
      Column_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: 0.9996
              Longitude_of_Central_Meridian: -87.0
              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
            Ordinate_Resolution: 1
          Planar_Distance_Units: meters
      Geodetic_Model:
        Horizontal_Datum_Name: North American Datum of 1983
        Ellipsoid_Name: Geodetic Reference System 80 (GRS 80)
        Semi-major_Axis: 6378137
        Denominator_of_Flattening_Ratio: 298.257
  Entity_and_Attribute_Information:
    Overview_Description:
      Entity_and_Attribute_Overview:
        32-bit pixels, 4 band color(RGBIR) values 0 - 255
      Entity_and_Attribute_Detail_Citation: None
  Distribution_Information:
    Distributor:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: Supervisor Customer Services Section
          Contact_Organization:
            USDA-FSA-APFO 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: GeoTIFF - Georeferenced Tagged Image File Format
          Format_Information_Content: Multispectral 4-band
        Digital_Transfer_Option:
          Offline_Option:
            Offline_Media: CD-ROM
            Recording_Format: ISO 9660 Mode 1 Level 2 Extensions
          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
      Fees:
        Contact the Aerial Photography Field Office
        for more information
    Resource_Description:
      m_3008601_ne_16_1_20150804_20151123.tif
  Metadata_Reference_Information:
    Metadata_Date: 20151125
    Metadata_Contact:
      Contact_Information:
        Contact_Organization_Primary:
          Contact_Organization:
            USDA-FSA-APFO 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
    Metadata_Standard_Name:
      Content Standard for Digital Geospatial Metadata
    Metadata_Standard_Version: FGDC-STD-001-1998