Identification_Information: Citation: Citation_Information: Originator: BBBBB Publication_Date: 20081130 Title: ZZZZZ County, NC, 0.5-foot-resolution digital color ortho imagery (2008) Edition: 1.0 Geospatial_Data_Presentation_Form: Raster digital data Publication_Information: Publication_Place: ZZZZZ County, NC Publisher: ZZZZZ County, NC Description: Abstract: This metadata record describes the color digital ortho imagery for ZZZZZ County, NC. This 200-scale imagery is comprised of natural color orthophotography with a GSD (Ground Sample Distance) of 0.5'. Imagery was collected with the CCCCC and processed with SSSSS software. Purpose: A digital orthophoto is a geometrically accurate photographic record of landscape conditions at the time of the corresponding aerial photography. As such, the digital orthophoto is useful for a variety of applications, such as environmental monitoring, facility engineering/maintenance, city/county planning, property line review, etc. The digital orthophoto can be used alone or as a raster basemap for corresponding vector line mapping. Supplemental_Information: The bounding coordinates in this metadata file represent the bounding coordinates for all image tiles in project area as a whole, not an individual tile. FOr more information, see the Project Report RRRRR. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 200803 Currentness_Reference: Ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: Unknown Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -81.070404 East_Bounding_Coordinate: -80.546088 North_Bounding_Coordinate: 35.526142 South_Bounding_Coordinate: 34.996167 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Aerial image Theme_Keyword: Orthoimagery Theme_Keyword: Basemap Theme_Keyword: Natural color Theme_Keyword: Digital orthophoto Theme_Keyword: Orthophoto Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: imageryBaseMapsEarthCover, 010 Place: Place_Keyword_Thesaurus: William S. Powell, The North Carolina GAZETTEER, A Place_Keyword: ZZZZZ County Place_Keyword: TTTTT Place_Keyword: North Carolina Access_Constraints: None Use_Constraints: None Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: PPPPP Contact_Organization: ZZZZZ County Contact_Position: WWWWW Contact_Address: Address_Type: mailing and physical Address: AAAAA City: TTTTT State_or_Province: NC Postal_Code: 99999 Country: U.S. Contact_Voice_Telephone: NNNNN Contact_Facsimile_Telephone: FFFFF Contact_Electronic_Mail_Address: EEEEE Hours_of_Service: 0800-1700 M-F EST Data_Quality_Information: Logical_Consistency_Report: Compliance with the accuracy standard was ensured by the placement of GPS ground control prior to the acquisition of aerial imagery. The following checks were performed: 1. The ground control and airborne GPS/INS data stream were validated through an aerotriangulation bundle adjustment using SSSSS. The residuals of the adjustment met the required standards with the results fully outlined in an AT report. 2. Digital orthophotography was validated through a visual inspection of control points, edge matching and general image quality. Completeness_Report: The following methods were used to ensure image quality: 1. Use of targeted ground control during image acquisition. 2. Use of GPS/INS during image acquisition. 3. Checking of controls against ortho product. 4. Post ortho accuracy approval checks for overall image quality (tone, color balance, etc.). Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: This image complies with ASPRS Class II standards. It has been tested at 95% confidence level to have an RMS positional displacement within 2 feet of well defined ground features in obscured areas. Does not apply to vertical surface features, such as structures, appearing in the digital orthophotography due to inherent lean. Tested horizontal RMSE on controls within the project area is 0.77'. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: There is no vertical component for orthos. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: BBBBB Publication_Date: Unpublished material Title: Aerial photography Edition: 1.0 Geospatial_Data_Presentation_Form: Remote-sensing image Publication_Information: Publication_Place: None Publisher: None Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 20080308 Single_Date/Time: Calendar_Date: 20080305 Single_Date/Time: Calendar_Date: 20080304 Source_Currentness_Reference: Ground condition Source_Citation_Abbreviation: IMG Source_Contribution: The aerial imagery was captured with CCCCC. The aerial images are used to AT the project and the production of orthophotos. Source_Information: Source_Citation: Citation_Information: Originator: BBBBB Publication_Date: Unpublished material Title: Ground control Edition: 1.0 Geospatial_Data_Presentation_Form: Vector digital data Publication_Information: Publication_Place: None Publisher: None Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2008 Source_Currentness_Reference: Ground condition Source_Citation_Abbreviation: CONT Source_Contribution: Targeted ground control is used to create a digital control file and control report as well as QC check of ortho accuracy. Predefined points (usually NGS) within the county are targeted, making the points visible in the photography. These points along with their precise coordinates are used in the AT process and to check the horizontal accuracy of the resulting orthophotos. 30 existing ground control points were used for this project. Source_Information: Source_Citation: Citation_Information: Originator: BBBBB Publication_Date: Unpublished material Title: Digital elevation model Edition: 1.0 Geospatial_Data_Presentation_Form: Vector digital data Publication_Information: Publication_Place: None Publisher: None Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2008 Source_Currentness_Reference: Ground condition Source_Citation_Abbreviation: DEM Source_Contribution: A new LiDAR survey output to a 20-ft spaced grid was produced by BBBBB for the project area. This DEM was used in the orthophoto production process. Source_Information: Source_Citation: Citation_Information: Originator: ZZZZZ County Publication_Date: Unpublished material Title: Tile definition Edition: 1.0 Geospatial_Data_Presentation_Form: Vector digital data Publication_Information: Publication_Place: none Publisher: none Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2008 Source_Currentness_Reference: Ground condition Source_Citation_Abbreviation: TLDEF Source_Contribution: The tile definition is used to cut orthorectified imagery into manageable, usable images. It was provided by ZZZZZ County, NC and references NAD83 SPCS North Carolina. Each tile is 5000' X 5000'. Source_Information: Source_Citation: Citation_Information: Originator: BBBBB Publication_Date: Unpublished material Title: Orthorectified imagery Edition: 1.0 Geospatial_Data_Presentation_Form: Remote-sensing image Publication_Information: Publication_Place: None Publisher: None Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2008 Source_Currentness_Reference: Ground condition Source_Citation_Abbreviation: OIMG1 Source_Contribution: This first level of orthorectified images are the product of using the AT solution and the DEM in SSSSS. They are large 4GB swaths that have yet to be mosaicked into manageable tiled orthos. Source_Information: Source_Citation: Citation_Information: Originator: BBBBB Publication_Date: Unpublished material Title: Tiled Orthophoto Edition: 1.0 Geospatial_Data_Presentation_Form: Remote-sensing image Publication_Information: Publication_Place: None Publisher: None Source_Scale_Denominator: 1200 Type_of_Source_Media: disc, DVD or online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2008 Source_Currentness_Reference: Ground condition Source_Citation_Abbreviation: OIMG2 Source_Contribution: The tiled orthophoto is the result of mosaicking orthorectified imagery and using the tile definition to cut into manageable, usable orthophotos. Process_Step: Process_Description: At selected locations throughout the site, accurate GPS coordinates and elevations are surveyed and the points are marked with targets which will be visible in the aerial photography. Source_Used_Citation_Abbreviation: None Process_Date: 2008 Source_Produced_Citation_Abbreviation: CONT Process_Step: Process_Description: New digital, color aerial imagery of the site is acquired using the CCCCC. Airborne GPS/IMU data is recorded along with the imagery. Source_Used_Citation_Abbreviation: None Process_Date: 2008 Source_Produced_Citation_Abbreviation: IMG Process_Step: Process_Description: Imagery and GPS/IMU data is downloaded from disc on the plane to disc on the ground. GPS/IMU mission data is processed together with simultaneously collected ground-based GPS base station data in forward and reverse directions. This precisely determines the aerial camera's position and orientation in the terrain (project) coordinate system and allows for correct orientation of the imagery. Source_Used_Citation_Abbreviation: IMG Process_Date: 2008 Source_Produced_Citation_Abbreviation: IMG Process_Step: Process_Description: Using the processed GPS/IMU data and correctly oriented imagery, a bundle adjustment is computed (AT) in SSSSS software. Source_Used_Citation_Abbreviation: IMG, CONT Process_Date: 2007 Source_Produced_Citation_Abbreviation: None Process_Step: Process_Description: Orthorectified imagery is produced using SSSSS software. They are large 4GB swaths that have yet to be mosaicked into manageable tiled orthos. Source_Used_Citation_Abbreviation: IMG, DEM Process_Date: 2008 Source_Produced_Citation_Abbreviation: OIMG1 Process_Step: Process_Description: Orthorectified imagery is mosaicked, locally color-balanced and cut to the tile definition boundaries. The tiled orthos are checked for accuracy against the surveyed ground control before further image editing. Source_Used_Citation_Abbreviation: OIMG1, CONT Process_Date: 2008 Source_Produced_Citation_Abbreviation: OIMG2 Process_Step: Process_Description: Tiled orthophotos then go through a rigorous manual QC process to evaluate for remaining hotspots (sun reflectance over water), tone quality, color balance and the feathering area between flightlines. Any imperfections at this point are manually edited. If necessary, the tiled images are then converted to required format. All images are either recorded on DVD, transferred to HD or posted on FTP for client access. Source_Used_Citation_Abbreviation: OIMG2 Process_Date: 2008 Source_Produced_Citation_Abbreviation: OIMG2 Cloud_Cover: 0 Spatial_Data_Organization_Information: 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: State Plane Coordinate System 1983 State_Plane_Coordinate_System: SPCS_Zone_Identifier: 3200 North Carolina Lambert_Conformal_Conic: Standard_Parallel: 34.333333 Standard_Parallel: 36.166667 Longitude_of_Central_Meridian: -79.000000 Latitude_of_Projection_Origin: 33.750000 False_Easting: 2000000.0 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: Coordinate pair Coordinate_Representation: Abscissa_Resolution: .05 Ordinate_Resolution: .05 Planar_Distance_Units: U.S. Feet Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.25722210088 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Color orthophotos are comprised of pixels. Each pixel is assigned a value of 0 to 255. That number will refer to a color look-up table which contains red, green and blue (RGB) values, each from 0 to 255, for that pixel within the image. Entity_and_Attribute_Detail_Citation: None Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: PPPPP Contact_Organization: ZZZZZ County Contact_Position: WWWWW Contact_Address: Address_Type: mailing and physical Address: AAAAA City: TTTTT State_or_Province: NC Postal_Code: 99999 Country: U.S. Contact_Voice_Telephone: NNNNN Contact_Facsimile_Telephone: FFFFF Contact_Electronic_Mail_Address: EEEEE Hours_of_Service: 0800-1700 M-F EST Resource_Description: ZZZZZ County, NC 1:1200, 0.5' pixel digital color orthophotography (2008) Distribution_Liability: ZZZZZ County GIS provides the geographic data "as is". This organization makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. Also, this organization makes no warranty, either expressed or implied, regarding the condition of the product or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these files have been processed successfully on computers at this organization, no warranty is made by this organization regarding the use of these data on any other system, nor does the fact of distribution constitute or imply such a warranty. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: MrSID Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://www.nconemap.com Access_Instructions: FTP Offline_Option: Offline_Media: CDROM, DVD, USB hard drive Recording_Capacity: Recording_Density: 700, 4400 Recording_Density_Units: mb Recording_Format: Unknown Fees: unknown Ordering_Instructions: Contact ZZZZZ County GIS, or visit the website Custom_Order_Process: Contact ZZZZZ County GIS, or visit the website Technical_Prerequisites: unknown Available_Time_Period: Time_Period_Information: Single_Date/Time: Calendar_Date: 2008 Metadata_Reference_Information: Metadata_Date: 20090128 Metadata_Review_Date: 20090130 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: PPPPP Contact_Organization: ZZZZZ County Contact_Position: WWWWW Contact_Address: Address_Type: mailing and physical Address: AAAAA City: TTTTT State_or_Province: NC Postal_Code: 99999 Country: U.S. Contact_Voice_Telephone: NNNNN Contact_Facsimile_Telephone: FFFFF Contact_Electronic_Mail_Address: EEEEE Hours_of_Service: 0800-1700 M-F ESTContact_Information: Metadata_Standard_Name: FGDC CSDGM Metadata_Standard_Version: FGDC-STD-001-1998