FSA 2009 Imagery 1 Meter

Nebraska FSA 2009 Imagery - 1 meter

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: USDA-FSA Aerial Photography Field Office
Publication_Date: 20090813
Title:
Nebraska FSA 2009 Imagery - 1 meter
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Salt Lake City, Utah
Publisher: USDA FSA Aerial Photography Field Office
Online_Linkage: http://dnr.nebraska.gov/digital-imagery-1993-through-2012-1-2-meter
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
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
meter 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 cover
the county extent.  Two types of compression may be
used for NAIP imagery: MrSID and JPEG 2000. Target
value for the compression ratio is (15:1).
Purpose:
The 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 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: 2009
Currentness_Reference:
Photography Source Image Dates.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -104.205361
East_Bounding_Coordinate: -95.009506
North_Bounding_Coordinate: 43.141350
South_Bounding_Coordinate: 39.884498
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: farming
Theme_Keyword: Digital Ortho rectified Image
Theme_Keyword: Mosaic
Theme_Keyword: Quarter Quadrangle Centered
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: ADAMS
Place_Keyword: ADAMS, NE
Place_Keyword: 31001
Place_Keyword: NE
Access_Constraints: None
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 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
Browse_Graphic:
Browse_Graphic_File_Name: None
Browse_Graphic_File_Description:
None
Browse_Graphic_File_Type: None
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3500
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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 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: 20090813
Title:
ADAMS, NE
Source_Scale_Denominator: 12000
Type_of_Source_Media: CD/DVD
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2009
Source_Currentness_Reference:
Majority Aerial Photography Date
Source_Citation_Abbreviation:
MrSID / JPEG2000 compressed image.
Source_Contribution:
Mosaicked County Image
Process_Step:
Process_Description:
The imagery was collected using ADS40-SH52 digital sensors.
Collection was performed using a combination of twin-engine aircraft flying
at an average flying height of 27,000 ft above mean terrain with 23% sidelap,
giving the collected data nominal ground sampling distance of 0.5 meters.
Based-upon the CCD Array configuration present in the ADS40 digital sensor,
imagery for each flight line is 12,000-pixels in width.  Red, Green, Blue,
Near-Infrared and Panchromatic image bands were collected.

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 GPro
software. Airborne GPS / IMU data was post-processed using IPAS, PosPac and/or TerraPos
software and reviewed to ensure sufficient accuracy for project requirements.

Using Pictovera 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.

Aerotriangulation 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 autocorrelation 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 aerotriangulation solution
for each block using Pictovera software.  Upon final bundle adjustment, the triangulated strips
were ortho-rectified to the USGS NED DEM for the project area.  The images
were re-sampled from the raw resolution of 0.5 meters to the required resolution of 1.0 meters.

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 NIR bands were combined to generate a final ortho-rectified image strip.
The ADS40 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 imagery was mosaicked using manual seamline generation in Orthovista Seam Editor (OVSE).
The 12 bit data range was adjusted for display in standard eight bit image channels by defining
a piecewise histogram stretch using OrthoVista 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.

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: 20090813
Process_Step:
Process_Description:
Metadata imported.
Source_Used_Citation_Abbreviation:
C:\DOCUME~1\GFollmer\LOCALS~1\Temp\xmlD.tmp
Process_Date: 20100104
Process_Time: 08233800
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Spatial_Data_Organization_Information:
Indirect_Spatial_Reference_Method:
ADAMS, NE
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 13
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 49413
Column_Count: 43233
Vertical_Count: 1
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System 1983
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: 2600
Lambert_Conformal_Conic:
Standard_Parallel: 40.000000
Standard_Parallel: 43.000000
Longitude_of_Central_Meridian: -100.000000
Latitude_of_Projection_Origin: 39.833333
False_Easting: 1640416.666667
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000100
Ordinate_Resolution: 0.000100
Planar_Distance_Units: survey feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Resolution: 1.000000
Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: raster.RASTERWRITE.FSA_09_SP
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: Name
Attribute:
Attribute_Label: Shape
Attribute_Definition:
Feature geometry.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates defining the features.
Attribute:
Attribute_Label: Raster
Attribute:
Attribute_Label: Shape.area
Attribute:
Attribute_Label: Shape.len
Overview_Description:
Entity_and_Attribute_Overview:
24 bit pixels, 3 band color (RGB) represent brightness values 0-255.
Entity_and_Attribute_Detail_Citation:
None
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Supervisor Customer Service 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
Resource_Description: Mosaicked County Image for ADAMS, NE
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: CD-ROM
Recording_Format: ISO 9660
Offline_Option:
Offline_Media: DVD-R
Recording_Format: ISO 9660
Offline_Option:
Offline_Media: USB/Firewire/SATA External Hard Drive
Recording_Format: NTFS
Fees: Contact the USDA-FSA Aerial Photography Field Office for more information.
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2009
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Metadata_Reference_Information:
Metadata_Date: 20100108
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Nebraska Department of Natural Resources
Contact_Position: GIS Coordinator
Contact_Address:
Address_Type: mailing and physical address
Address:
301 Centennial Mall South
City: Lincoln
State_or_Province: Nebraska
Postal_Code: 65809
Country: USA
Contact_Voice_Telephone: 402-471-2363
Contact_Facsimile_Telephone: 402-471-2900
Contact_Electronic_Mail_Address: dnr.gis@nebraska.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: http://www.esri.com/metadata/esriprof80.html
Profile_Name: ESRI Metadata Profile
Metadata_Extensions:
Online_Linkage: http://www.esri.com/metadata/esriprof80.html
Profile_Name: ESRI Metadata Profile
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