Identification_Information: Citation: Citation_Information: Originator: Aero-graphics, Inc. Publication_Date: 2016 Title: East_Center.sid Geospatial_Data_Presentation_Form: raster digital data Description: Abstract: Aero-graphics acquired high resolution digital imagery over approximately 1767 square miles located in Cass County, North Dakota. Images were flown with a Piper PA-23 Aztec aircraft equipped with a Microsoft/Vexcel UltraCam Eagle digital camera by Aero-graphics, Inc on April 13, 21 and 22, 2016. There are a total of 1789 ortho tiles available in GeoTIFF and SID formats, along with 6 larger SID mosaics. Purpose: This data depicts geographic features on the surface of the earth. Digital orthophotos are aerial images corrected for displacement caused by relief in the Earth's surface, camera/sensor lens distortion and tilting of the sensor at the time of image acquisition. Additionally, orthophotos are assigned a uniform scale, which allows an end-user the ability to derive accurate measurements from the imagery. Orthophotos can be used as an accurate record of landscape conditions at the time of the corresponding aerial imagery. As such, the digital orthophotos are used in 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 base map for corresponding vector line mapping. Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 20160413 Single_Date/Time: Calendar_Date: 20160421 Single_Date/Time: Calendar_Date: 20160422 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -97.253990 East_Bounding_Coordinate: -96.744097 North_Bounding_Coordinate: 47.062311 South_Bounding_Coordinate: 46.817210 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Aerial Imagery Theme_Keyword: Digital Orthoimagery Theme_Keyword: Imagery Theme_Keyword: Natural Color Theme_Keyword: Ortho Theme_Keyword: Orthoimagery Theme_Keyword: Orthophoto Theme_Keyword: Rectified Place: Place_Keyword_Thesaurus: Geographic Names Information System Place_Keyword: United States of America Place_Keyword: North Dakota Place_Keyword: Cass County Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: 2016 Access_Constraints: None Use_Constraints: None. However, users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Aero-graphics, Inc. Contact_Address: Address_Type: mailing and physical address Address: 40 West Oakland Avenue City: Salt Lake City State_or_Province: Utah Postal_Code: 84115-3007 Country: USA Contact_Voice_Telephone: (801) 487-3273 Contact_Facsimile_Telephone: (801) 487-3313 Contact_Electronic_Mail_Address: agi@aero-graphics.com Hours_of_Service: 7:30 AM - 5 PM Mon. - Fri. Data_Set_Credit: Aero-graphics, Inc. Security_Information: Security_Classification_System: None Security_Classification: Unclassified Security_Handling_Description: None Native_Data_Set_Environment: Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4000 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Image color values may deviate from color values of the original imagery due to image value interpolation during the rectification process and during quality control processing of the imagery. Radiometry is verified by visual inspection of the ortho image. Logical_Consistency_Report: Compliance with the accuracy standard was ensured by the placement of paneled ground control during the acquisition of aerial imagery. The following checks were performed: 1. The ground control and airborne GPS/IMU data stream were validated through an aerotriangulation bundle adjustment using Inpho software. 2. Digital orthophotography was validated through a visual inspection of control points, edge matching and general image quality. Completeness_Report: Orthoimages are visually inspected for completeness to ensure that no gaps or image misplacements exist within and between adjacent images. These images are derived by mosaicking multiple images to ensure complete coverage. Source imagery is cloud free. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Orthorectified imagery meets or exceeds National Map Accuracy Standards for 1"=100' (1:1200) scale imagery. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Aero-graphics, Inc. Publication_Date: 2016 Title: Aerial Imagery Geospatial_Data_Presentation_Form: raster digital data Publication_Information: Publication_Place: Aero-graphics, Inc. Publisher: Aero-graphics, Inc. Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 20160413 Single_Date/Time: Calendar_Date: 20160421 Single_Date/Time: Calendar_Date: 20160422 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: IMG Source_Contribution: New digital, color aerial imagery of the site was acquired using a single aircraft and a Microsoft/Vexcel UltraCam Eagle sensor. Airborne GPS/IMU data was recorded at the time of all imagery acquisition. Source_Information: Source_Citation: Citation_Information: Originator: Aero-graphics, Inc. Publication_Date: 2016 Title: Survey Control Geospatial_Data_Presentation_Form: document Publication_Information: Publication_Place: Aero-graphics, Inc. Publisher: Aero-graphics, Inc. Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2016 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: CTL Source_Contribution: Geodetic ground control was used to create a digital control file and control report. Source_Information: Source_Citation: Citation_Information: Originator: Aero-graphics, Inc. Publication_Date: 2016 Title: Aerotriangulation Geospatial_Data_Presentation_Form: tabular digital data Publication_Information: Publication_Place: Aero-graphics, Inc. Publisher: Aero-graphics, Inc. Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2016 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: AT Source_Contribution: Imagery was aerotriangulated for the use of generating orthoimages. Source_Information: Source_Citation: Citation_Information: Originator: Aero-graphics, Inc. Publication_Date: 2016 Title: Orthoimagery Geospatial_Data_Presentation_Form: raster digital data Publication_Information: Publication_Place: Aero-graphics, Inc. Publisher: Aero-graphics, Inc. Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20160503 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: ORTHO Source_Contribution: Orthoimages were generated from imagery and the aerotriangulation. Process_Step: Process_Description: Imagery Acquisition - Equipment and Methodology: The imagery was collected using a Microsoft/Vexcel UltraCam Eagle direct digital sensor, which has a 100.5 millimeter focal length. Collection was performed using a Piper Aztec PA-23 aircraft with 30% side lap, giving the collected data nominal ground sampling distance of 0.5 foot. Based upon the CCD Array configuration present in the UltraCam Eagle digital sensor, imagery for each exposure is 20,010 pixels in width. Red, Green, Blue, Infrared and Panchromatic image bands were collected. Process_Date: 2016 Source_Produced_Citation_Abbreviation: IMG Source_Produced_Citation_Abbreviation: RAW Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Aero-graphics, Inc. Contact_Address: Address_Type: mailing and physical address Address: 40 West Oakland Avenue City: Salt Lake City State_or_Province: Utah Postal_Code: 84115-3007 Country: USA Contact_Voice_Telephone: (801) 487-3273 Contact_Facsimile_Telephone: (801) 487-3313 Contact_Electronic_Mail_Address: agi@aero-graphics.com Hours_of_Service: 7:30 AM - 5 PM Mon. - Fri. Process_Step: Process_Description: Ground Survey - Equipment and Methodology: Aero-graphics used CORS base stations and statically-collected survey data at strategic points throughout the project area to ensure that the image data maintained its true geographic integrity. The Applanix SmartBase Network was used to differentially correct the aircraft's trajectory data. Process_Date: 2016 Source_Produced_Citation_Abbreviation: CTL Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Aero-graphics, Inc. Contact_Address: Address_Type: mailing and physical address Address: 40 West Oakland Avenue City: Salt Lake City State_or_Province: Utah Postal_Code: 84115-3007 Country: USA Contact_Voice_Telephone: (801) 487-3273 Contact_Facsimile_Telephone: (801) 487-3313 Contact_Electronic_Mail_Address: agi@aero-graphics.com Hours_of_Service: 7:30 AM - 5 PM Mon. - Fri. Process_Step: Process_Description: Aerotriangulation Workflow: Aerotriangulation blocks were defined primarily by order of acquisition and consisted of 57 imagery 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 into 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 Inpho software. Source_Used_Citation_Abbreviation: CTL Source_Used_Citation_Abbreviation: IMG Process_Date: 2016 Source_Produced_Citation_Abbreviation: AT Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Aero-graphics, Inc. Contact_Address: Address_Type: mailing and physical address Address: 40 West Oakland Avenue City: Salt Lake City State_or_Province: Utah Postal_Code: 84115-3007 Country: USA Contact_Voice_Telephone: (801) 487-3273 Contact_Facsimile_Telephone: (801) 487-3313 Contact_Electronic_Mail_Address: agi@aero-graphics.com Hours_of_Service: 7:30 AM - 5 PM Mon. - Fri. Process_Step: Process_Description: Ortho Processing Workflow: Rectification was accomplished using the aerotriangulation data, images and autocorrelated points. Once rectified, the orthoimagery was mosaicked using auto generated seamlines in OrthoVista Seam Editor (OVSE). The 8 bit data range was adjusted for display in standard 8 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. Using OrthoVista software, the imagery was mosaicked and tiled to tile extents. These went through an extensive QA/QC process to ensure the contract specifications were met. Source_Used_Citation_Abbreviation: AT Source_Used_Citation_Abbreviation: CTL Source_Used_Citation_Abbreviation: IMG Process_Date: 2016 Source_Produced_Citation_Abbreviation: ORTHO Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Aero-graphics, Inc. Contact_Address: Address_Type: mailing and physical address Address: 40 West Oakland Avenue City: Salt Lake City State_or_Province: Utah Postal_Code: 84115-3007 Country: USA Contact_Voice_Telephone: (801) 487-3273 Contact_Facsimile_Telephone: (801) 487-3313 Contact_Electronic_Mail_Address: agi@aero-graphics.com Hours_of_Service: 7:30 AM - 5 PM Mon. - Fri. Cloud_Cover: 0% Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Cell_Value_Type: Pixel Raster_Object_Type: Pixel Row_Count: 167922 Column_Count: 247498 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: 3302 Lambert_Conformal_Conic: Standard_Parallel: 46.183333 Standard_Parallel: 47.483333 Longitude_of_Central_Meridian: -100.500000 Latitude_of_Projection_Origin: 45.666667 False_Easting: 1968500.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.001000 Ordinate_Resolution: 0.001000 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: Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Natural color orthoimagery is organized in three color bands or channels which represent the red, green, and blue portions of the spectrum. Each image pixel is assigned a triplet of numeric values, one for each color band. Numeric values range from 0 to 255. Areas where data is incomplete due to lack of full image coverage are represented with the numeric value of 0. Entity_and_Attribute_Detail_Citation: U.S. Department of the Interior, U.S. Geological Survey, 1996, Standards for Digital Orthophotos: Reston, VA. Metadata_Reference_Information: Metadata_Date: 20160630 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Aero-graphics, Inc. Contact_Address: Address_Type: mailing and physical address Address: 40 West Oakland Ave City: Salt Lake City State_or_Province: Utah Postal_Code: 84115-3007 Country: USA Contact_Voice_Telephone: (801) 487-3273 Contact_Facsimile_Telephone: (801) 487-3313 Contact_Electronic_Mail_Address: agi@aero-graphics.com Hours_of_Service: 7:30 AM - 5 PM Mon. - Fri. Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Security_Information: Metadata_Security_Classification_System: None Metadata_Security_Classification: Unclassified Metadata_Security_Handling_Description: None Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile