Metadata:
  Identification_Information:
    Citation:
      Citation_Information:
        Originator: USDA-FSA-APFO Aerial Photography Field Office
        Publication_Date: 20110302
        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).  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
        of ortho imagery within one year of acquisition. NAIP provides
        four main products: 1 meter ground sample distance (GSD) ortho
        imagery rectified to a horizontal accuracy of within +/- 5
        meters of reference digital ortho quarter quads (DOQQ's) from
        the National Digital Ortho Program (NDOP); 2 meter GSD
        ortho imagery rectified to within +/- 10 meters of reference
        DOQQs; 1 meter GSD ortho imagery rectified to within +/- 6
        meters to true ground; and, 2 meter GSD ortho imagery rectified
        to within +/- 10 meters to true ground.  The tiling format of
        NAIP imagery is based on a 3.75' x 3.75' quarter quadrangle
        with a 300 meter buffer on all four sides.  NAIP quarter quads
        are formatted to the UTM coordinate system using NAD83.  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 GSD product
        provides an ortho image base for Common Land Unit boundaries and
        other data sets.  The 1 meter 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.  With an annual cycle, NAIP is also used
        for disaster response often providing the most current pre-event
        imagery.  While suitable for a variety of uses the 2 meter
        GSD NAIP imagery is primarily intended to assess crop condition
        and compliance to USDA farm program conditions.  The 2
        meter imagery is generally acquired only for agricultural areas
        within state projects.
    Time_Period_of_Content:
      Time_Period_Information:
           Single_Date/Time:
             Calendar_Date: 20100611
      Currentness_Reference: Ground Condition
    Status:
      Progress: Complete
      Maintenance_and_Update_Frequency: Irregular
    Spatial_Domain:
      Bounding_Coordinates:
        West_Bounding_Coordinate:  -122.9375
        East_Bounding_Coordinate:  -122.8750
        North_Bounding_Coordinate:  38.1250
        South_Bounding_Coordinate:  38.0625
    Keywords:
      Theme:
        Theme_Keyword_Thesaurus: None
        Theme_Keyword: farming
        Theme_Keyword: Digital Ortho rectified Image
        Theme_Keyword: Ortho Rectification
        Theme_Keyword: Quarter Quadrangle Centered
        Theme_Keyword: NAIP
        Theme_Keyword: Aerial Compliance
        Theme_Keyword: Compliance
      Place:
        Place_Keyword_Thesaurus: Geographic Names Information System
        Place_Keyword: CA
        Place_Keyword: Marin
        Place_Keyword: 06041
        Place_Keyword: CA041
        Place_Keyword: MARIN CO CA FSA
        Place_Keyword: 3812257
        Place_Keyword: DRAKES BAY, NE
        Place_Keyword: DRAKES BAY
    Access_Constraints: There are no limitations for access.
    Use_Constraints:
      Imagery may be replaced to address defects found in a
      small number of products through quality assurance
      processes.  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: 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:
          FSA Digital Orthophoto Specs.
    Lineage:
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: USDA-FSA-APFO Aerial Photography Field Office
            Publication_Date: 20110302
            Title: DRAKES BAY, 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: 20100611
          Source_Currentness_Reference:
            Aerial Photography Date for aerial photo source.
        Source_Citation_Abbreviation: Georectifed Image
        Source_Contribution: Digital Georectifed Image.

      Process_Step:
        Process_Description:
           Aerial photography acquired from April 24, 2010 until 
          September 30, 2010. Aerial photography was acquired 
          using a frame based digital camera (UltraCamD (UCD), 
          UltraCamX (UCX), or DMC), therefore no scanning conversion 
          from film to digital was needed. Geometric and radiometric 
          calibration for each one of the camera heads is determined 
          in the manufacturing laboratory.  This step is also 
          known as geometric and radiometric calibration of a 
          single  camera head and done when the sensor is being 
          manufactured. The 4 multispectral  heads collect 4 
          separated bands:  Red, Green, Blue and Near Infrared 
          wavelength. Both the UltraCam and DMC sensors collect 
          12bit data.  The UCD sensor CCD pixel size is 9 micron 
          with a footprint of 7500 pixels in the long track, and 
          11500 pixels in the cross track. The UCX sensor CCD pixel 
          size is 7.2 micron with a footprint of 9420 pixels in the 
          long track, and 14430 pixels in the cross track. The 
          DMC sensor CCD pixel size is 12 micron with a footprint 
          of 7680 pixels in the long track, and 13824 pixels in 
          the cross track. Twin Engine Navajo and Malibu, Turbo 
          Commander and Cessna 320 and Cessna  Conquest aircraft 
          were used, flying at average flight height of 6,500 
          to 8,500 meters above ground, allowing image acquisition 
          of 0.40 to 0.67 meters  Ground Sample Distance.  An INS - 
          Inertial Navigation System, with AGPS (Airborne GPS) and 
          IMU (Inertial Measurement Unit) was utilized for all 
          aerial missions. The INS allows for accurate photo-center 
          registration and image orientation.  For inspection and 
          verification of accuracy of the exterior orientation 
          computed with the Inertial Navigation System, stereo 
          compilation was performed for every flight mission and 
          its result compared against higher accuracy source data.  
          If a test of positional accuracy failed (> 5 meters) a 
          full analytical triangulation is processed for that 
          mission, assuring accurate horizontal positioning. 
          USGS seamless NED data was used as a surface for 
          ortho-rectification. Sanborn used proprietary software 
          called METRO to rectify the scanned images. Rectification 
          was done using cubic convolution resampling. Color 
          balancing was then performed on each exposure.  Sanborns 
          software tonally balanced each exposure to alleviate the 
          effects of hotspots, side-to-side shading within an 
          exposure, and tonal differences between flightlines 
          due to dissimilar conditions at the time of capture.  
          Each exposure was then balanced to predefined target 
          values used throughout the project, creating a dataset 
          consistent and uniform in radiometry.  Seams between 
          exposures were determined by Sanborns software to use 
          the best exposure based on proximity to nadir and ground 
          angle to the camera.  Delivery tiles were then extracted 
          from Sanborns seamlessimagery database, named to meet the 
          DOQQ and/or DOQ naming convention, and formatted as defined 
          in the task order. Horizontal accuracy was once again tested 
          for 6-meter absolute accuracy. If necessary, a new 
          aerotriangulation adjustment would be performed for the 
          affected flight mission and new set of doqqs produced. 
          Quality control was performed on a sampling of each 
          deliverable to ensure no artifacts or anomalies were 
          present in the imagery. Satellite imagery was  also 
          used to supplement aerial imagery to complete up to 12 
          DOQQ tiles for which  suitable airborne imagery was 
          unavailable. The supplemental satellite imager was 
          acquired using GeoEye-1. GeoEye-1 scenes were acquired 
          from GeoEye. Sensor model and orientations were supplied. 
          The raw data has a sub-meter pixel resolution and provided 
          in 4 bands:  Red, Green, Blue and Near Infrared wavelength.  
          USGS seamless 2009 NED (National Elevation Data) was used 
          as surface for ortho-rectification. Sanborn utilized 
          commercial software called OrthoPRO, form Z/I Intergraph, 
          to ortho-rectify the digital satellite images. The rectified  
          images were then integrated into Sanborn proprietary 
          software called METRO. The final production processes 
          then followed the same procedures as described above  
          for the aerial photography.
          
        Process_Date: 20110302
  Spatial_Data_Organization_Information:
    Indirect_Spatial_Reference: Marin County, CA
    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: 10
            Transverse_Mercator:
              Scale_Factor_at_Central_Meridian: 0.9996
              Longitude_of_Central_Meridian: -123.0
              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
      Fees:
        Contact the Aerial Photography Field Office
        for more information
    Resource_Description:
      m_3812257_ne_10_1_20100611_20110110.tif
  Metadata_Reference_Information:
    Metadata_Date: 20110302
    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