Radiometry (image visual consistency) for the 4 Counties of Study Area 3 (SA3) was accomplished...
Ultramap software was utilized to balance each of the exposures to visually match one another before processing of the data took place. After seamline mosaicing was completed a project wide adjustment was created to match the target samples provided by the state.
Seamline polygons were automatically created using Ultramap software before being reviewed for any necessary changes. Areas of change were identified with manual adjustments being implimented before final tiles were created.
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The technical approach and methods utilized for the production of orthoimagery were designed to meet ASPRS Class I horizontal accuracies at a design scale of 1:1,200 (1 in equals 100 ft) where the limiting RMSE in either X or Y is not greater than 1.0'. Horizontal accuracy compliance was verified through a number of steps and procedures. First, the two UltraCam Eagle-100 sensors and airborne acquisition systems had been verified by acquiring imagery of the North Carolina Validation Range (VR) in Surry County, NC and processing the imagery as a mini project to include all project deliverables defined by the NC DOT expedited camera report. The aero-triangulation results and orthoimage tiles for these Validation Range flights were reviewed and verified by NCDOT and NCGS for accuracy compliance prior to execution of the CO24 project. Boresight range calibration flights were also accomplished for each sensor in 2021 to calculate updated misalignment angles. These VR and boresight projects essentially confirmed that the Ultracam Eagle 100 sensors technical procedures utilized to produce orthoimagery are acceptable to meet the project horizontal positional accuracy standards. Next, thirty-five (35) ground control points were withheld as control from the initial AT block adjustment during the Aero-Triangulation (AT) phase. These points were designated as check points (as opposed to primary control) within the initial AT block adjustment. Residuals were measured within the photogrammetry AT process and reported within the Attachment E (aero-triangulation:AT) report. This report and statistics were evaluated by NCDOT Photogrammetry to ensure compliance with the designed accuracy requirements. The GPS surveyed ground control and NCGS paneled monuments points used as checkpoints points were then rolled into the final AT block adjustment as control points, with the results and statistics provided to CGIA/NCDOT within Attachment E report. Also, within the final Orthoimagery rectification step, all control point positions used for CO24, Study Area-3 (SA3) that were reported in Attachment C-1 (ground control report), were visually inspected and measured within the imagery and compared to actual surveyed coordinates. Finally, the NCGS conducted GPS surveys of photo ID locations (PIDs) throughout SA5, with a standard to survey on the order of 20 to 30 locations within each County. These GPS field surveyed coordinates are then compared to final orthoimagery measured coordinates using Accuracy Analyst software to generate final project accuracy compliance reports and statistics. These horizontal accuracy assessment reports are available from the NCGS website.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: There is no vertical component for this set of orthoimagery.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Surveying and Mapping, LLC
Publication_Date: 20231231
Title: Flight and Control Plan: CO24 SA3, Attachment C
Edition: 1.0
Geospatial_Data_Presentation_Form:
Microsoft Word DOC, Adobe PDF, Excel Spreadsheet, ESRI Shapefiles, Google kmz files, and flight files.
Publication_Information:
Publication_Place: Charlotte, NC
Publisher: Surveying and Mapping, LLC
Type_of_Source_Media: FTP, disc
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2024
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: FLGCPLN
Source_Contribution:
The Imagery Acquisition and Ground Control Plan, Attachment-C, approved by CGIA and NCDOT provided the source data, materials and technical plan to execute the ground control and imagery acquisition phases outlined in Task 1 under the CO24 Scope of work.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Surveying and Mapping, LLC
Publication_Date: 20231231
Title: Ultracam Eagle 100 Digital Airborne Imagery
Edition: 1.0
Geospatial_Data_Presentation_Form: Raster TIFF, Adobe pdf, ASCII Text and Excel Spreadsheet
Publication_Information:
Publication_Place: Charlotte, NC
Publisher: Surveying and Mapping, LLC
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20240118
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: DAIMGRY
Source_Contribution:
The raw exploitation digital airborne imagery acquired by Ultracam Eagle 100 digital sensors served as the foundation image component for CO24 Study Area 3 (SA3) within the coastal terrain of SA3. The raw imagery for SA3 was collected at a planned altitude of about 9459 feet Above Mean Terrain (AMT) for both sensors using a 2-Dimensional terrain flight plan method to capture imagery at at average 5.8 inch pixel resolution and within NC DOT specified Ground Sample Distances (GSD) across each image in 13 sorties utilizing a planned minimum 60% forward lap and 32% sidelap format. The imagery was collected in a proprietary RAW image format and post processed as a 4-band (RGB and CIR) color, 8-bit, uncompressed TIFF raster image file, tiled at 256 with averaged overviews. The final post processed 4-band 8-bit TIFF images were then utilized for the Aero-Triangulation, DEM update, Seamline generation and Orthoimagery rectification and production phases. The exploitation imagery acquisition was reported for CO24 SA3 within one Imagery Acquisition Compliance Report, dated 20240416. Attachment D report may be obtained from CGIA.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Surveying and Mapping, LLC
Publication_Date: 20240328
Title: Airborne GPS and Inertial Measurement Unit (IMU) Data
Edition: 1.0
Geospatial_Data_Presentation_Form: Excel Spreadsheet, Adobe pdf and ASCII Text
Publication_Information:
Publication_Place: Charlotte, NC
Publisher: Surveying and Mapping, LLC
Type_of_Source_Media: disc and FTP
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20240316
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: ABGPSIMU
Source_Contribution:
The Airborne GPS data provides accurate geodetic coordinates for the nadir point of each raw exploitation image at the precise time of exposure. The IMU data provides accurate omega, phi and kappa orientation angles representing the attitude of the sensor at the precise time of exposure for each image. The Airborne GPS coordinates and IMU orientation angle values play a key role in the accuracy of the Aero-Triangulation process by supplementing the field survey ground control, thus saturating the project study area with exploitation image control by providing preliminary pre-aero-triangulation coordinates and sensor attitude to each exploitation image. The Airborne GPS coordinates were expressed horizontally in NC SPC NAD83 (2011), US Survey Feet and vertically in NAVD 1988 (GEOID18), US Survey Feet. The omega, phi and kappa IMU orientation angles were expressed in decimal degrees. The Airborne GPS and IMU data was reported for CO24 SA3 within Airborne GPS_IMU Post Processing Report Attachment E dated 20240614. Attachment E report may be obtained from CGIA.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Surveying and Mapping, LLC
Publication_Date: 20240614
Title:
Ground Control Data and Surveys Report Attachment C-1, CO24 SA3 AT Block 1
Edition: 1.0
Geospatial_Data_Presentation_Form: Excel Spreadsheet, Adobe pdf, and pdf pictures
Publication_Information:
Publication_Place: Charlotte, NC
Publisher: Surveying and Mapping, LLC
Type_of_Source_Media: disc and FTP
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20240614
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: GCSA#
Source_Contribution:
The Ground Control data provides precise NC State Plane geodetic coordinates and elevations for pre-paneled and photo-identifiable positions throughout CO24 Study Area 3 (SA3). These control point positions were measured along with pass and tie points within the imagery during the relative orientation Aero-Triangulation (AT) measurement process. The precise ground control coordinate values along with the GPSIMU data were then applied in an absolute AT adjustment in order to accurately control and geo-reference each image within the SA3 AT block and to validate the control and check points used during the process. Within Study Area 3, one hundred and one hundred (100) locations were GPS surveyed by OPUS and/or NC RTK procedures with a minimum 20 minute GPS observation (OPUS) and 3 to 4 minute observation (RTK) using CORS data from the NC Geodetic Survey (NCGS) network for differential correction. thirty-five (35) ground control points were used as Checkpoints within the Aero-Triangulation adjustment of the AT Block for SA3 to calculate residuals from the AT adjusted coordinates relative to known surveyed coordinates. Checkpoints were then merged into the final AT adjustments as Control. The Ground Control coordinates were expressed horizontally in NC State Plane Coordinates (NCSPC), North American Datum NAD83 (2011), US Survey Feet and vertically in NAVD 1988 (GEOID18), US Survey Feet. Ground Control data and surveys were reported within Attachment C-1 Control Surveys Report for CO24 SA3 dated 20240304 and approved by NCGS in Advisory report dated 20240328.
Source_Information:
Source_Citation:
Citation_Information:
Originator: NC Department of Transportation
Publication_Date: 20211028
Title: NCDOT Bridge Locations
Geospatial_Data_Presentation_Form: ESRI Shapefile
Publication_Information:
Publication_Place: Raleigh, NC
Publisher: NC Department of Transportation
Type_of_Source_Media: FTP
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20211028
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: BRIDGLOC
Source_Contribution:
The NCDOT Bridge Location shapefile was utilized during the Internal Level-1 Macro (IL1M) quality control review process to visit each bridge location in the orthoimagery within CO24 Study Area-3 (SA3) to determine if special DEM treatment was required to remove distortion introduced to the bridge by being an elevated structure overpass or culvert relative to the ground level defined by the NC Floodplain Mapping LiDAR at each location.
Source_Information:
Source_Citation:
Citation_Information:
Originator: NC Department of Transportation
Publication_Date: 20200320
Title: NCDOT Construction History
Geospatial_Data_Presentation_Form: ESRI Shapefile
Publication_Information:
Publication_Place: Raleigh, NC
Publisher: NC Department of Transportation
Type_of_Source_Media: FTP
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20200320
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: CONHIST
Source_Contribution:
The NCDOT Construction History shapefile was utilized during the Internal Level-1 Macro (IL1M) quality control review process to visit each new roadway construction project in the orthoimagery within CO24 Study Area-3 (SA3) to determine if special DEM treatment was required to update the Digital Elevation Model (DEM defined by the NC Floodplain Mapping LiDAR dataset.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Geospatial and Technology Management Office
Publication_Date: 20200101
Title:
NC Floodplain Mapping Program (FMP) LIDAR digital elevation model
Edition: 1.0
Geospatial_Data_Presentation_Form: digital data
Publication_Information:
Publication_Place: Raleigh
Publisher: Geospatial and Technology Management Office
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20150101
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: LIDAR DEM
Source_Contribution:
The LIDAR digital elevation data used for the rectification of the orthophotos was provided by the Geospatial and Technology Management Office.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Geospatial and Technology Management Office
Publication_Date: 20210101
Title: Tile index
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: 20100101
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: INDEX
Source_Contribution:
The tile definition is used to cut orthorectified imagery into manageable, usable images. Each tile is 5000' X 5000'.
Source_Information:
Source_Citation:
Citation_Information:
Originator: NC Geodetic Survey
Publication_Date: 20210101
Title: North Carolina County Boundaries
Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Raleigh
Publisher: NC Geodetic Survey
Type_of_Source_Media: digital download
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20210101
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: CB
Source_Contribution:
The county boundaries are used to select tiles by county for packaging imagery for offline distribution.
Process_Step:
Process_Description:
Imagery Acquisition Flight and Ground Control Planning.
The flight planning for SA3 has been accomplished using a 3-dimensional ground relief model that checks and adjusts for variable image endlap, and varied flight line sidelap and flight altitude in order to keep all planned flight results and parameters within the project specifications. All acquisition within SA3 has been planned to meet the 33-degree sun angle requirement. The minimal coastal ground relief within SA3 combined with the high-altitude large format footprint of the UCE100 sensors dictated that a basic custom flight plan design of initial 62% endlap and 32% sidelap is adequate to meet all project flight geometry and GSD requirements, with the final result based on a true 3_D analysis and output.
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Surveying and Mapping, LLC
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 9800 Southern Pine Blvd.
Address: Suite I
City: Charlotte
State_or_Province: North Carolina
Postal_Code: 28273
Country: USA
Contact_Voice_Telephone: 980-296-6100
Contact_Facsimile_Telephone: ###-###-####
Contact_Electronic_Mail_Address: Yvonne.Harding@sam.biz
Process_Step:
Process_Description:
Ground Control Surveys. All primary points were visited, checked and re-paneled or replaced with a suitable photo id point where needed. All GPS surveys performed by Surveying and Mapping, LLC were performed between 20240112 and 20240123 under the direct supervision of a North Carolina Professional Land Surveyor. Initial publication of Attachment C-1 was on 20240304.
Source_Used_Citation_Abbreviation: GCSA#
Process_Date: 20240304
Source_Produced_Citation_Abbreviation: GC
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Surveying and Mapping, LLC
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 9800 Southern Pine Blvd.
Address: Suite I
City: Charlotte
State_or_Province: North Carolina
Postal_Code: 28273
Country: USA
Contact_Voice_Telephone: 980-296-6100
Contact_Facsimile_Telephone: ###-###-####
Contact_Electronic_Mail_Address: Yvonne.Harding@sam.biz
Process_Step:
Process_Description:
Airborne GPS and IMU data acquisition.
Upon completion of each flight sortie, the navigation data was downloaded and processed according to the NC State GNSS-IMU post processing workflow. Once satisfactory results were obtained with the flight trajectory of the aircraft, the camera rotations and exterior orientations were developed for all imagery based upon the airborne GNSS (GPS) and IMU results. All imagery was processed through NCDOT EO Checker software and reports of results provided to CGIA and NCDOT within five days of each sortie acquisition date.
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Surveying and Mapping, LLC
Contact_Position: Prime Consultant
Contact_Address:
Address_Type: mailing and physical address
Address: 9800 Southern Pine Blvd.
City: Charlotte
State_or_Province: NC
Postal_Code: 28273
Country: USA
Contact_Voice_Telephone: 980-296-6100
Contact_Facsimile_Telephone: ###-###-####
Contact_Electronic_Mail_Address: Yvonne.Harding@sam.biz
Process_Step:
Process_Description:
Digital Airborne Exploitation Imagery Post Processing.
Upon completion of each flight sortie, the navigation data was downloaded and processed according to the NC State GNSS-IMU post processing workflow. Once satisfactory results were obtained with the flight trajectory of the aircraft, the camera rotations and exterior orientations were developed for all imagery based upon the airborne GNSS (GPS) and IMU results. Image QA/QC was performed using automated algorithms for finding image blurs or other potential issues along with a visual inspection of each exposure of imagery. All imagery was processed through NCDOT EO Checker software and reports of results provided to CGIA and NCDOT within five days of each sortie acquisition date.
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Surveying and Mapping, LLC
Contact_Position: Prime Consultant
Contact_Address:
Address_Type: mailing and physical address
Address: 9800 Southern Pine Blvd.
Address: Suite I
City: Charlotte
State_or_Province: NC
Postal_Code: 28273
Country: USA
Contact_Voice_Telephone: 980-296-6100
Contact_Facsimile_Telephone: ###-###-####
Contact_Electronic_Mail_Address: Yvonne.Harding@sam.biz
Process_Step:
Process_Description:
Airborne GPS and Inertial Measurement Unit (IMU) Post Processing.
Upon completion of each flight sortie, the navigation data was downloaded and processed according to the NC State GNSS-IMU post processing workflow. Once satisfactory results were obtained with the flight trajectory of the aircraft, the camera rotations and exterior orientations were developed for all imagery based upon the airborne GNSS (GPS) and IMU results. Image QA/QC was performed using automated algorithms for finding image blurs or other potential issues along with a visual inspection of each exposure of imagery. All imagery was processed through NCDOT EO Checker software and reports of results provided to CGIA and NCDOT within five days of each sortie acquisition date.
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Surveying and Mapping, LLC
Contact_Position: Prime Consultant
Contact_Address:
Address_Type: mailing and physical address
Address: 9800 Southern Pine Blvd.
Address: Suite I
City: Charlotte
State_or_Province: NC
Postal_Code: 28273
Country: USA
Contact_Voice_Telephone: 980-296-6100
Contact_Facsimile_Telephone: ###-###-####
Contact_Electronic_Mail_Address: Yvonne.Harding@sam.biz
Process_Step:
Process_Description:
Digital Softcopy Aero-Triangulation.
Flight lines were planned for Study Area 3 (SA3) based upon the project specifications using a north to south orientation except for 8 lines oriented along bridges and barrier islands. Aero-triangulation for SA3 was completed in one (1) AT block. AT block covers the entire study area three (SA3). AT Block aero-triangulation consists of 73 flight lines and 5302 exposures.
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Surveying and Mapping, LLC
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 9800 Southern Pine Blvd.
Address: Suite I
City: Charlotte
State_or_Province: NC
Postal_Code: 28273
Country: USA
Contact_Voice_Telephone: 980-296-6100
Contact_Facsimile_Telephone: ###-###-####
Contact_Electronic_Mail_Address: Yvonne.Harding@sam.biz
Process_Step:
Process_Description:
LiDAR Digital Elevation Model (DEM) review and update.
LiDAR Digital Elevation Model data for the SA3 area was reviewed for areas of change across Study Area 3. These changes were made prior to any rectification of the final orthoimagery.
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Surveying and Mapping, LLC
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 9800 Southern Pine Blvd.
Address: Suite I
City: Charlotte
State_or_Province: NC
Postal_Code: 28273
Country: USA
Contact_Voice_Telephone: 980-296-6100
Contact_Facsimile_Telephone: ###-###-####
Contact_Electronic_Mail_Address: Yvonne.Harding@sam.biz
Process_Step:
Process_Description:
Exploitation image rectification to an Orthoimage.
Ultramap software was utlized to autorectify the acquired RAW imagery using Aero-triangulation as well as the LiDAR surface. Seamlines were autogenerated and reviewed as part of the workflow to utilize the best coverage possible for each Ortho Image.
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Surveying and Mapping, LLC
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 9800 Southern Pine Blvd.
Address: Suite I
City: Charlotte
State_or_Province: NC
Postal_Code: 28273
Country: USA
Contact_Voice_Telephone: 980-296-6100
Contact_Facsimile_Telephone: ###-###-####
Contact_Electronic_Mail_Address: Yvonne.Harding@sam.biz
Process_Step:
Process_Description:
Seamline Development Digitizing and Seamline Polygon Generation.
Seamlines are autogenerated and reviewed using Ultramap software. Once completed they are exported for final review in GIS software for any issues.
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Surveying and Mapping, LLC
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 9800 Southern Pine Blvd.
Address: Suite I
City: Charlotte
State_or_Province: NC
Postal_Code: 28273
Country: USA
Contact_Voice_Telephone: 980-296-6100
Contact_Facsimile_Telephone: ###-###-####
Contact_Electronic_Mail_Address: Yvonne.Harding@sam.biz
Process_Step:
Process_Description:
Final Orthoimagery seamline editing, color balancing and final Image Processing Adjustments.
All of the rectified ortho imagery is reviewed for any distortions, misalignments or radiometry concerns. Once these concerns have been identified they are addressed in the processing software Ultramap or with Photoshop. A final Radiometric adjustment is then applied to all of the Orthoimagery in accordance with the landcover samples approved by the State.
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Surveying and Mapping, LLC
Contact_Position: Prime
Contact_Address:
Address_Type: mailing and physical address
Address: 9800 Southern Pine Blvd.
Address: Suite I
City: Charlotte
State_or_Province: NC
Postal_Code: 28273
Country: USA
Contact_Voice_Telephone: 980-296-6100
Contact_Facsimile_Telephone: ###-###-####
Contact_Electronic_Mail_Address: Yvonne.Harding@sam.biz
Process_Step:
Process_Description:
Orthoimage Tile Mosaic Processing. Surveying and Mapping, LLC utilized Ultramap to cut Orthophoto tile polygons from final orthorectified exploitation imagery during the final mosaic process step. A State grid map file was imported into Ultramap using grid definitions for the 5,000' x 5,000' orthoimage tiles required for Study Area-3 (SA3) as defined in the Excel spreadsheet, CO24_Tile_Delivery_Order.xlsx, provided by CGIA. The final orthoimages, seamline polygons and product definitions were processed in the final mosaic process step to output the final 5,000' x 5,000' orthoimage tiles. All SA3 final orthoimages, mosaic polygons and product definitions were processed simultaneously to ensure the final mosaic output, edge matching, color and tone balancing is consistent across the entire study area. The orthoimage tiles were named using the required file naming convention (e.g. OF6i0_37_000_20055902_20210129_0308R0.tif). The orthoimage tiles were subject to four (4) different levels of quality control. Resolutions for problems detected during these levels of quality control were documented and reported in Product Review documentation maintained at edit call locations on VOICE, the on-line image service for the CO24 project as well as on the CO24 CGIA sponsored Sharepoint site. Delivery of the final orthoimage tiles and ancillary data was documented and reported in Attachment F Orthoimagery Delivery Reports for each of the four (4) primary delivery Counties within CO24 SA3. Attachment F reports may be obtained from CGIA.
Source_Used_Citation_Abbreviation: ORTHOIMGSA#, INDEX
Process_Date: 20240715
Source_Produced_Citation_Abbreviation: OIMGTILE
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Surveying and Mapping, LLC
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 9800 Southern Pine Blvd.
Address: Suite I
City: Charlotte
State_or_Province: NC
Postal_Code: 28273
Country: USA
Contact_Voice_Telephone: 980-296-6100
Contact_Facsimile_Telephone: ###-###-####
Contact_Electronic_Mail_Address: Yvonne.Harding@sam.biz
Process_Step:
Process_Description:
Create an image service from finished orthoimagery submitted by contractors to display in an online application for visual quality review.
Source_Used_Citation_Abbreviation: OIMGTILE
Process_Date: 20240715
Source_Produced_Citation_Abbreviation: OIMGSERV
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Airbus DS Geo, Inc.
Contact_Position: Project Manager
Contact_Address:
Address_Type: mailing and physical address
Address: 2721 Council Tree Avenue, Suite 206
City: Fort Collins
State_or_Province: CO
Postal_Code: 80525
Country: USA
Contact_Voice_Telephone: 970-215-5049
Contact_Facsimile_Telephone: ###-###-####
Contact_Electronic_Mail_Address: sabrina.travis@airbus.com
Process_Step:
Process_Description:
Visual quality control consisted of several levels of review. Project contractors conducted both initial macro and micro lever review of all data. After the data was released to the State, NCDOT reviewed 30% of each county's ortho tiles, CGIA reviewed 5% and the counties had the ability to review the full county worth of data but were provided a list of 25% of required tiles to review. CGIA then reviewed all submitted issues and submitted those considered to be in scope to project guidelines to the contractors for review. Contractor teams reviewed these submitted issues and assessed whether a fix was feasible. Tiles that were repaired were validated by NCDOT to ensure that fixes were made and did not introduce new issues. All review by NCDOT, CGIA and other end-users as well as contractor's assessment and evaluation were conducted in a cloud-hosted environment accessible through an online mapping interface called VOICE.
Source_Used_Citation_Abbreviation: OIMGSERV
Process_Date: 20240715
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NC Center for Geographic Information and Analysis
Contact_Position: Project Manager
Contact_Address:
Address_Type: mailing address
Address: 20322 Mail Service Center
City: Raleigh
State_or_Province: NC
Postal_Code: 27699-0322
Country: USA
Contact_Voice_Telephone: 919-754-6377
Contact_Facsimile_Telephone: 919-715-8551
Contact_Electronic_Mail_Address: ben.shelton@nc.gov
Process_Step:
Process_Description:
Horizontal quality control consists of utilizing quality control test points obtained from an independent source of higher accuracy of the tested product. The purpose of the quality control test is to determine the horizontal accuracy of the product and produce a report documenting the result of the accuracy test.
Source_Used_Citation_Abbreviation: OIMGTILE
Process_Date: 20240715
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NC Geodetic Survey
Contact_Position: Director
Contact_Address:
Address_Type: mailing address
Address: 4105 Reedy Creek Road
Address: NC National Guard Complex
City: Raleigh
State_or_Province: NC
Postal_Code: 27699-4298
Country: USA
Contact_Voice_Telephone: 919-733-3836
Contact_Facsimile_Telephone: 919-733-4407
Contact_Electronic_Mail_Address: gary.thompson@ncdenr.gov
Process_Step:
Process_Description:
20:1 MRSID Tile Creation- CGIA created a standalone 20:1 compressed copy of each orthoimagery tile delivered in the CO24 project. Lizardtech software was used to compress each TIFF tile to a 20:1 MRSID formatted file. The resulting MRSID files maintain the same file name as the TIFF tiles.
Source_Used_Citation_Abbreviation: OIMGTILE
Process_Date: 20240715
Source_Produced_Citation_Abbreviation: MRSID
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NC Center for Geographic Information and Analysis
Contact_Position: Project Manager
Contact_Address:
Address_Type: mailing address
Address: 20322 Mail Service Center
City: Raleigh
State_or_Province: NC
Postal_Code: 27699-0322
Country: USA
Contact_Voice_Telephone: 919-754-6377
Contact_Facsimile_Telephone: 919-715-8551
Contact_Electronic_Mail_Address: ben.shelton@nc.gov
Process_Step:
Process_Description:
50:1 MRSID Countywide Mosaic Creation- CGIA created a standalone 50:1 compressed file of all of the imagery that intersects each county. Lizardtech software was used to merge all of the 20:1 MRSID tiles into a unified singular 50:1 compressed file containing all imagery for a county, excluding any sensitive military areas.
Source_Used_Citation_Abbreviation: MRSID
Process_Date: 20240715
Source_Produced_Citation_Abbreviation: MRSIDMOS
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NC Center for Geographic Information and Analysis
Contact_Position: Project Manager
Contact_Address:
Address_Type: mailing address
Address: 20322 Mail Service Center
City: Raleigh
State_or_Province: NC
Postal_Code: 27699-0322
Country: USA
Contact_Voice_Telephone: 919-754-6377
Contact_Facsimile_Telephone: 919-715-8551
Contact_Electronic_Mail_Address: ben.shelton@nc.gov
Process_Step:
Process_Description:
CGIA product validation process: Before delivery of data to each county, CGIA validated that each county would receive all TIFF and MRSID 20:1 compression tiles that intersect that county and ensured that the files were named correctly, were correctly spatially referenced, and validated that each County data delivery contains a countywide MRSID 50:1 compression mosaic, an index shapefile denoting the location of each tile, a seamline polygon that denotes the location and date of each discrete image used to create the imagery, project documentation about the ortho creation process, any updated elevation information, and both MRSID 20:1 compression tiles and a MRSID 50:1 mosaic for each neighboring county.
Process_Date: 20240715
Source_Produced_Citation_Abbreviation: VALID
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NC Center for Geographic Information and Analysis
Contact_Position: Project Manager
Contact_Address:
Address_Type: mailing address
Address: 20322 Mail Service Center
City: Raleigh
State_or_Province: NC
Postal_Code: 27699-0322
Country: USA
Contact_Voice_Telephone: 919-754-6377
Contact_Facsimile_Telephone: 919-715-8551
Contact_Electronic_Mail_Address: ben.shelton@nc.gov