Identification_Information: Citation: Citation_Information: Originator: USDA-FSA Aerial Photography Field Office Title: ortho_1-1_1n_s_ga067_2007_1.sid Publication_Date: 20071212 Publication_Information: Publication_Place: Salt Lake City, Utah Publisher: USDA FSA 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 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. This file was generated by compressing NAIP quarter quadrangle tiles that cover a county. MrSID compression, with mosaic option, was used. Target values for the compression ratio are (15:1) and maximum number of compression levels are used. 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: 2007 Currentness_Reference: Majority years of Photography Dates. Status: Progress: Complete Maintenance_and_Update_Frequency: Irregular Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -84.764717 East_Bounding_Coordinate: -84.303288 North_Bounding_Coordinate: 34.135214 South_Bounding_Coordinate: 33.678494 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: NAIP Theme_Keyword: Compliance Theme_Keyword: Aerial Compliance Place: Place_Keyword_Thesaurus: Geographic Names Information System Place_Keyword: GA Place_Keyword: COBB Place_Keyword: COBB, GA Place_Keyword: 13067 Access_Constraints: None Use_Constraints: Users should be aware that this is an interim release. The interim compressed county mosaic may contain defects and have horizontal accuracy less than the specified tolerances. 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: 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: 801-973-3500 Contact_Facsimile_Telephone: 801-975-3529 Browse_Graphic: Browse_Graphic_File_Name: None Browse_Graphic_File_Description: None Browse_Graphic_File_Type: None Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.0 Service Pack 4; ESRI ArcCatalog 9.2 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. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: N/A 2d only Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Aerial Photography Field Office Title: n3308403.ne Publication_Date: 2007-08-03 Source_Scale_Denominator: 20000 Type_of_Source_Media: CD Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Source_Currentness_Reference: Majority Aerial Photography Date Source_Citation_Abbreviation: MrSID compressed image Source_Contribution: 3.75' quarter quadrangle used in Mosaicked County Image Source_Information: Source_Citation: Citation_Information: Originator: Aerial Photography Field Office Title: n3308403.nw Publication_Date: 2007-08-03 Source_Scale_Denominator: 20000 Type_of_Source_Media: CD Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Source_Currentness_Reference: Majority Aerial Photography Date Source_Citation_Abbreviation: MrSID compressed image 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Source_Contribution: 3.75' quarter quadrangle used in Mosaicked County Image Source_Information: Source_Citation: Citation_Information: Originator: Aerial Photography Field Office Title: n3408459.se Publication_Date: 2007-09-21 Source_Scale_Denominator: 20000 Type_of_Source_Media: CD Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Source_Currentness_Reference: Majority Aerial Photography Date Source_Citation_Abbreviation: MrSID compressed image Source_Contribution: 3.75' quarter quadrangle used in Mosaicked County Image Source_Information: Source_Citation: Citation_Information: Originator: Aerial Photography Field Office Title: n3408459.sw Publication_Date: 2007-08-03 Source_Scale_Denominator: 20000 Type_of_Source_Media: CD Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Source_Currentness_Reference: Majority Aerial Photography Date Source_Citation_Abbreviation: MrSID compressed image Source_Contribution: 3.75' quarter quadrangle used in Mosaicked County Image Source_Information: Source_Citation: Citation_Information: Originator: Aerial Photography Field Office Title: n3408460.ne Publication_Date: 2007-12-06 Source_Scale_Denominator: 20000 Type_of_Source_Media: CD Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Source_Currentness_Reference: Majority Aerial Photography Date Source_Citation_Abbreviation: MrSID compressed image Source_Contribution: 3.75' quarter quadrangle used in Mosaicked County Image Source_Information: Source_Citation: Citation_Information: Originator: Aerial Photography Field Office Title: n3408460.nw Publication_Date: 2007-09-09 Source_Scale_Denominator: 20000 Type_of_Source_Media: CD Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Source_Currentness_Reference: Majority Aerial Photography Date Source_Citation_Abbreviation: MrSID compressed image Source_Contribution: 3.75' quarter quadrangle used in Mosaicked County Image Source_Information: Source_Citation: Citation_Information: Originator: Aerial Photography Field Office Title: n3408460.se Publication_Date: 2007-12-06 Source_Scale_Denominator: 20000 Type_of_Source_Media: CD Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Source_Currentness_Reference: Majority Aerial Photography Date Source_Citation_Abbreviation: MrSID compressed image Source_Contribution: 3.75' quarter quadrangle used in Mosaicked County Image Source_Information: Source_Citation: Citation_Information: Originator: Aerial Photography Field Office Title: n3408460.sw Publication_Date: 2007-09-09 Source_Scale_Denominator: 20000 Type_of_Source_Media: CD Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Source_Currentness_Reference: Majority Aerial Photography Date Source_Citation_Abbreviation: MrSID compressed image Source_Contribution: 3.75' quarter quadrangle used in Mosaicked County Image Source_Information: Source_Citation: Citation_Information: Originator: Aerial Photography Field Office Title: n3408461.ne Publication_Date: 2007-08-14 Source_Scale_Denominator: 20000 Type_of_Source_Media: CD Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Source_Currentness_Reference: Majority Aerial Photography Date Source_Citation_Abbreviation: MrSID compressed image Source_Contribution: 3.75' quarter quadrangle used in Mosaicked County Image Source_Information: Source_Citation: Citation_Information: Originator: Aerial Photography Field Office Title: n3408461.nw Publication_Date: 2007-08-10 Source_Scale_Denominator: 20000 Type_of_Source_Media: CD Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Source_Currentness_Reference: Majority Aerial Photography Date Source_Citation_Abbreviation: MrSID compressed image Source_Contribution: 3.75' quarter quadrangle used in Mosaicked County Image Source_Information: Source_Citation: Citation_Information: Originator: Aerial Photography Field Office Title: n3408461.se Publication_Date: 2007-08-14 Source_Scale_Denominator: 20000 Type_of_Source_Media: CD Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Source_Currentness_Reference: Majority Aerial Photography Date Source_Citation_Abbreviation: MrSID compressed image Source_Contribution: 3.75' quarter quadrangle used in Mosaicked County Image Source_Information: Source_Citation: Citation_Information: Originator: Aerial Photography Field Office Title: n3408461.sw Publication_Date: 2007-08-10 Source_Scale_Denominator: 20000 Type_of_Source_Media: CD Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Source_Currentness_Reference: Majority Aerial Photography Date Source_Citation_Abbreviation: MrSID compressed image Source_Contribution: 3.75' quarter quadrangle used in Mosaicked County Image Process_Step: Process_Description: Aerial photography was acquired from June 25, 2007 until October 2007. A Digital Mapping Camera was utilized for direct digital image acquisition, and no scanning conversion from film to digital was needed. The Z/I DMC - Frame Digital Mapping Camera - was utilized for the entire State. An INS - Inertial Navigation System, with AGPS (Airborne GPS) and IMU (Inertial Measurement Unit), was utilized for all the aerial mission, allowing for accurate photo-center registration and image orientation. The digital images were separated in blocks of photos for aerotriangulation measurement, processing and block adjustment. Strategic features were matched and identifiable points were chosen from both the existing orthophoto and the second-generation image as check and control points. For this step we made use of automated measurement for passpoints and tie-points between adjacent photos and flight lines, and manual observation for measurement of control and check points. An operator observed well-distributed points to control the block of photos, and performed a check after each measurement in order to ensure that new orientation meets specified accuracy. While measuring the control points in individual images, additional pass/tie points were added were needed in overlapping image areas. The manual measurement of points resulted initially in only the horizontal (X,Y) coordinates of the control points. Elevation (Z) values were obtained by projecting the measured point down onto the existing NED dataset and a subsequent interpolation. In a final step a bundle block adjustment is performed to derive final exterior orientations for each image needed for the ortho-rectification process. USGS seamless NED data was used as a surface for ortho-rectification. Sanborn utilized commercial software called OrthoPRO, form Z/I Intergraph, to ortho-rectify the digital aerial images. The ortho rectification was performed using results of the aerotriangulation for each individual digital image, and projecting it over the Digital Elevation Model - NED - and by differential ortho rectification creating a true scaled imagery for each aerial photo. Cubic convolution resampling method was utilized during the ortho-rectification Color balancing was then performed on each exposure. Pixel-Q software from Intergraph was utilized to perform color balance and color adjustment for enhancement of the image, meeting specified histogram parameters required by USDA. Each digital image was then dodged for even distribution of lightness and darkness of the aerial photo. The tonal balance and dodging of each rectified image alleviates the effects of hotspots, side-to-side shading within an exposure, and tonal differences between flight lines 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. Automated seamlines were processed and create between each ortho-rectified image. Seams between exposures were determined by the software to use the best exposure based on proximity to nadir and ground angle to the camera. Seams were then manually modified only to avoid splitting buildings/bridges or to improve feature visibility. Delivery tiles were then extracted following OrthoPRO's NDOPDOQ database, named to meet the DOQQ and/or DOQ naming convention, and formatted as defined in the task order. Quality control was performed on each tile to ensure no artifacts or anomalies were present in the imagery. Once all the DOQQs that cover the County were finalized and approved by the QC Department, the CCM, Compressed County Mosaic, was created using GeoExpress 6.0 creating MrSid files, in Generation 3 format and 15:1 compression ratio. Process_Date: 20071210 Spatial_Data_Organization_Information: Indirect_Spatial_Reference: COBB, GA 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: 16 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -87 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: 24-bit pixels, 3 band color (RGB) represent brightness values 0 - 255 Entity_and_Attribute_Detail_Citation: None Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Supervisor Sales Services Branch 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: 801-975-3500 Contact_Facsimile_Telephone: 801-975-3529 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: 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 Fees: Contact the Aerial Photography Field Office for more information Resource_Description: Downloadable Data Metadata_Reference_Information: Metadata_Date: 20071210 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: 801-975-3500 Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998