North Carolina Center for Geographic Information and Analysis 20231114 1.0 Raster digital data Raleigh, NC NC Center for Geographic Information and Analysis on behalf of the North Carolina 911 Board https://services.nconemap.gov Orthoimagery in North Carolina captured during leaf-off conditions in early 2023, 6-inch ground resolution, is a public resource provided by North Carolina's Statewide Orthoimagery Program, supported by the NC 911 Board. The state program includes orthoimagery acquired between 2012 and 2023. The Program is consistent with the Business Plan for Orthoimagery in North Carolina (https://it.nc.gov/documents/files/business-plan-orthoimagery-north-carolina/download?attachment) that recommends acquisition of one-fourth of the state (or 25 counties) per year in a four-year cycle. The products for 2023 are orthoimagery in 4-band true color with IR (RGBIR) (2012-2019 was 3-band, RGB), 6-inch ground resolution in 5,000 by 5,000-foot tiles, in uncompressed and compressed formats, packaged by county for distribution and accessible through the NC OneMap Geospatial Portal. The project was managed by the NC Center for Geographic Information and Analysis (CGIA) in the NC OneMap framework of data access. CGIA collaborated with the NC Geodetic Survey, the NC Department of Transportation's Photogrammetry Unit, and the Land Records Management office in the Office of the Secretary of State to form a state team with expertise and experience in orthoimagery. Acquisition contractors were selected by a Qualifications-Based Selection process. In addition the Statewide Mapping Advisory Committee's Working Group for Orthophotography Planning provided technical advice. Images were collected with digital cameras in early 2023, image processing and quality control occurred through 2023, and products became available by late 2023. Image services are accessible and data are downloadable through NC OneMap. This 21 county orthophoto project is referenced herein as Southern Piedmont and Mountains 2023 (SPM23) Study Area 3 (SA3). Imagery was acquired with Navajo aircraft with airborne acquisition systems using Ultracam sensors, Applanix POSAV- 510 GPS-IMU sensors with TrackAir for flight planning and camera control and image acquisition management. Imagery was acquired between 0213 and 0305, 2023 by a total of 7 sorties. Digital airborne imagery was acquired during deciduous leaf off, cloud free, minimum 33 degree sun angle conditions. The beginning and end date of imagery acquisition was incorporated in the final orthoimage tile naming scheme as the last two fields in the tile name, incorporating the revision number in the last field; the beginning date of acquisition designated as: 20230213 and the final date of acquisition designated as: 0305(e.g. OC6i0_37_000_10362304_20230213_0218R2.tif). The raw imagery was post processed using a very strict and consistent process to ensure radiometric consistency throughout the project. Aero-Triangulation (AT) was conducted to consolidate the individual images and flight lines into mathematically cohesive blocks that are geo-referenced to the designated project coordinate system and datum to support orthoimage production. Two AT Blocks were involved with SPM23 SA3 imagery covering all referenced five counties. Ground control was provided from paneled NCGS monuments and new pre-paneled locations that were surveyed by GPS with OPUS and RTN procedures. Digital Elevation Model (DEM) data for differential orthophoto rectification was provided by NC Floodplain Mapping LiDAR (Bare Earth and grid TINS postings) which was reviewed and updated as necessary at a density level sufficient to accurately represent the shape of the ground and to meet the required ASPRS Class I Orthophoto accuracy standards for 1 inch equals 100 foot scale mapping. Seamline polygons were generated by a combined auto-correlation process and manual digitizing with edits as necessary for each individual orthorectified image to produce a seamless mosaic of ortho-rectified imagery. Seamlines were delivered as ArcGIS attributed polygons for all 5 counties of SPM23 SA3 with each polygon having attributes of flight line number, exposure number, image acquisition date, and ESRI generated parameters of area and perimeter distance. Seamline data for the 5 counties within SPM23 SA3 has also been documented and described as a separate metadata file. This separate and independent SPM23 SA3 seamline metadata file can be obtained from CGIA. Project status was reported to the client (CGIA) on a weekly to biweekly basis by submitting a written status report with supporting documentation. Project status meeting conference calls were held every week or every other week to review status and discuss action items. All project tasks and sub-tasks were detailed, documented and reported to CGIA in detailed Attachment Reports: C (Flight and Control Plan), C-1 (Ground Control Surveys), D (Imagery Acquisition Compliance), E (GPS-IMU Post Processing and Aero-Triangulation), F (Orthoimagery Delivery per county), and G (Final Report). The SPM23 project was divided into four Study Areas (SA) with the 5 counties described herein as: Cleveland, Gaston, Lincoln, Polk, Rutherford Counties comprising Study Area 3; thereby designated as SPM23 SA3. This dataset was generated to provide a consistent reference map for base mapping and display in emergency 911 operations and GIS applications. This Study Area dataset is one of four Study Area datasets produced within SPM23, and SPM23 represents one year within the four year cycle to complete orthoimagery of the entire State of North Carolina The bounding coordinates in this metadata file represent the bounding coordinates for all image tiles in the project area (SPM23 SA3) as a whole, not an individual tile or even individual county. 20230213 20230305 Ground condition Complete As needed -82.351545 -80.915723 35.629061 35.130539 ISO 19115 Topic Category aerial image orthoimagery basemap natural color infrared digital orthophoto orthophotophotography ortho imagery piedmont leaf-off imageryBaseMapsEarthCover, 010 William S. Powell, The North Carolina GAZETTEER Cleveland County Gaston County Lincoln County Polk County Rutherford County North Carolina None The State of North Carolina shall not be held liable for any errors in this dataset, including visual content and positional accuracy of this imagery or image capture dates associated with the filename. Ben Shelton NC Center for Geographic Information and Analysis, Department of Information Technology Project Manager mailing

20322 Mail Service Center

Raleigh NC 27699-0322 U.S. 919-754-6377 919-715-8551 ben.shelton@nc.gov 0900-1600 M-F EST This collaborative project included significant roles by the following: (1) the North Carolina 911 Board to acquire statewide orthoimagery from 2010-2023; (2) NC Department of Public Safety, Division of Emergency Management, Hazard Mitigation Program Support manages statewide elevation data used in processing orthoimagery; (3) NC Geographic Information Coordinating Council's Statewide Mapping Advisory Committee, Working Group for Orthophotography Planning provided technical advice; (4) NC Geodetic Survey manages the Continuously Operating Reference Station (CORS) network and played a key role in ground control as well as horizontal quality control of the data; (5) NC Secretary of State's Office, Land Records Management Program provided NC Technical Specifications for Digital Orthophoto Base Mapping (2014) and technical advice; (6) The NC Center for Geographic Information and Analysis managed the overall project including management of contractors, outreach, product verification and distribution, and data access via NC OneMap; and (7) the NC Department of Transportation Photogrammetry Unit provides technical assistance and oversight by performing review of all technical deliverables to include flight planning, acquisition compliance, aerotriangulation and post-processing. None Unclassified None SHexagon ImageStation, OrthoPro, Geomedia essentials, ImageStation AT, ESRI ArcGIS 10.5, Adobe Photoshop CS5 Native_Data_Set_Format: Raster Orthoimagery Tile (TIFF or MrSID) Radiometry (image visual consistency) for the 5 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. 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 SPM23 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, one hundred sixty-four (164) 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 SPM23, 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. There is no vertical component for this set of orthoimagery. Surveying and Mapping, LLC 20231114 1.0 Microsoft Word DOC, Adobe PDF, Excel Spreadsheet, ESRI Shapefiles, Google kmz files, and flight files. Charlotte, NC Surveying and Mapping, LLC FTP, disc 2023 Ground condition FLGCPLN 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 SPM23 Scope of work. Surveying and Mapping, LLC 20230213 1.0 Raster TIFF, Adobe pdf, ASCII Text and Excel Spreadsheet Charlotte, NC Surveying and Mapping, LLC disc 20230213 Ground condition DAIMGRY The raw exploitation digital airborne imagery acquired by Ultracam Eagle 100 digital sensors served as the foundation image component for SPM23 Study Area 3 (SA3) within the southern piedmont and mountains terrain of SA3. The raw imagery for SA3 was collected at a planned altitude of about 10019 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 6 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 SPM23 SA3 within one Imagery Acquisition Compliance Report, dated 05032023. Attachment D report may be obtained from CGIA. Surveying and Mapping, LLC 20230213 1.0 Excel Spreadsheet, Adobe pdf and ASCII Text Charlotte, NC Surveying and Mapping, LLC disc and FTP 20230305 Ground condition ABGPSIMU 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 SPM23 SA3 within Airborne GPS_IMU Post Processing Report Attachment E for AT Blocks 1&2 dated 20230517. Attachment E report may be obtained from CGIA. Surveying and Mapping, LLC 20230419 1.0 Excel Spreadsheet, Adobe pdf, and pdf pictures Charlotte, NC Surveying and Mapping, LLC disc and FTP 20230517 Ground condition GCSA# The Ground Control data provides precise NC State Plane geodetic coordinates and elevations for pre-paneled and photo-identifiable positions throughout SPM23 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 two SA3 AT blocks and to validate the control and check points used during the process. Within Study Area 3, one hundred and sixty-four (164) 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. Fifty-five (55) ground control points were used as Checkpoints within the Aero-Triangulation adjustment of the two AT Blocks 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 SPM23 SA3 dated 20230405 with revision R1 dated 20230419 and approved by NCGS in Advisory report dated 20230425. NC Department of Transportation 20190722 ESRI Shapefile Raleigh, NC NC Department of Transportation FTP 20190722 Ground condition BRIDGLOC 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 SPM23 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. NC Department of Transportation 20200320 ESRI Shapefile Raleigh, NC NC Department of Transportation FTP 20200320 Ground condition CONHIST 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 SPM23 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. Geospatial and Technology Management Office 20200101 1.0 digital data Raleigh Geospatial and Technology Management Office disc 20150101 Ground condition LIDAR DEM The LIDAR digital elevation data used for the rectification of the orthophotos was provided by the Geospatial and Technology Management Office. Geospatial and Technology Management Office 20210101 1.0 vector digital data None None disc 20100101 Ground condition INDEX The tile definition is used to cut orthorectified imagery into manageable, usable images. Each tile is 5000' X 5000'. NC Geodetic Survey 20210101 1.0 vector digital data Raleigh NC Geodetic Survey digital download 20210101 Ground condition CB The county boundaries are used to select tiles by county for packaging imagery for offline distribution. 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 moderate mountain to valley 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. withheld 20230207 Surveying and Mapping, LLC Prime Vendor mailing and physical address

9800 Southern Pine Blvd.

Suite I

Charlotte North Carolina 28273 USA 980-296-6100 ###-###-#### Yvonne.Harding@sam.biz 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 20230110 and 20230321 under the direct supervision of a North Carolina Professional Land Surveyor. Initial publication of Attachment C-1 was on 20230405. A revised Attachment C-1 Report was published on 20230418. withheld 20230418 withheld Surveying and Mapping, LLC Prime Vendor mailing and physical address

9800 Southern Pine Blvd.

Suite I

Charlotte North Carolina 28273 USA 980-296-6100 ###-###-#### Yvonne.Harding@sam.biz 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. withheld 20230310 withheld Surveying and Mapping, LLC Prime Consultant mailing and physical address

9800 Southern Pine Blvd.

Charlotte NC 28273 USA 980-296-6100 ###-###-#### Yvonne.Harding@sam.biz 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. withheld 20230310 withheld Surveying and Mapping, LLC Prime Consultant mailing and physical address

9800 Southern Pine Blvd.

Suite I

Charlotte NC 28273 USA 980-296-6100 ###-###-#### Yvonne.Harding@sam.biz 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. withheld 20230310 withheld Surveying and Mapping, LLC Prime Consultant mailing and physical address

9800 Southern Pine Blvd.

Suite I

Charlotte NC 28273 USA 980-296-6100 ###-###-#### Yvonne.Harding@sam.biz Digital Softcopy Aero-Triangulation. Flight lines have been planned for Study Area 3 (SA3) based upon the project specifications using a north to south orientation. Aero-triangulation for SA3 will be completed in two (2) AT blocks. AT blocks will cover the entire study area three (SA3). AT Blocks aero-triangulation will be completed by SAM’s photogrammetry Team member Axis Geospatial and will consist of 76 flight lines and 5462 exposures. withheld 20230405 withheld Surveying and Mapping, LLC Prime Vendor mailing and physical address

9800 Southern Pine Blvd.

Suite I

Charlotte NC 28273 USA 980-296-6100 ###-###-#### Yvonne.Harding@sam.biz LiDAR Digital Elevation Model (DEM) review and update. LiDAR Digital Elevation Model data for the SA3 area was reviewed and updated for areas of change across Study Area 3. These changes were made prior to any rectification of the final orthoimagery. withheld 20230401 withheld Surveying and Mapping, LLC Prime Vendor mailing and physical address

9800 Southern Pine Blvd.

Suite I

Charlotte NC 28273 USA 980-296-6100 ###-###-#### Yvonne.Harding@sam.biz 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. withheld 20230501 withheld Surveying and Mapping, LLC Prime Vendor mailing and physical address

9800 Southern Pine Blvd.

Suite I

Charlotte NC 28273 USA 980-296-6100 ###-###-#### Yvonne.Harding@sam.biz 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. withheld 20230501 withheld Surveying and Mapping, LLC Prime Vendor mailing and physical address

9800 Southern Pine Blvd.

Suite I

Charlotte NC 28273 USA 980-296-6100 ###-###-#### Yvonne.Harding@sam.biz 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. withheld 20230630 withheld Surveying and Mapping, LLC Prime mailing and physical address

9800 Southern Pine Blvd.

Suite I

Charlotte NC 28273 USA 980-296-6100 ###-###-#### Yvonne.Harding@sam.biz 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, SPM23_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 SPM23 project as well as on the SPM23 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 three (3) primary delivery Counties within NPM23 SA3. Attachment F reports may be obtained from CGIA. withheld 20230715 withheld Surveying and Mapping, LLC Prime Vendor mailing and physical address

9800 Southern Pine Blvd.

Suite I

Charlotte NC 28273 USA 980-296-6100 ###-###-#### Yvonne.Harding@sam.biz Create an image service from finished orthoimagery submitted by contractors to display in an online application for visual quality review. withheld 20230715 withheld Airbus DS Geo, Inc. Project Manager mailing and physical address

2721 Council Tree Avenue, Suite 206

Fort Collins CO 80525 USA 970-482-4400 970-218-5838 mmiddendorf@airbus-na.com 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. withheld 20230715 NC Center for Geographic Information and Analysis Project Manager mailing address

20322 Mail Service Center

Raleigh NC 27699-0322 USA 919-754-6377 919-715-8551 ben.shelton@nc.gov 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. withheld 20230715 NC Geodetic Survey Director mailing address

4105 Reedy Creek Road

NC National Guard Complex

Raleigh NC 27699-4298 USA 919-733-3836 919-733-4407 gary.thompson@ncdenr.gov 20:1 MRSID Tile Creation- CGIA created a standalone 20:1 compressed copy of each orthoimagery tile delivered in the SPM23 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. withheld 20230715 withheld NC Center for Geographic Information and Analysis Project Manager mailing address

20322 Mail Service Center

Raleigh NC 27699-0322 USA 919-754-6377 919-715-8551 ben.shelton@nc.gov 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. withheld 20230715 withheld NC Center for Geographic Information and Analysis Project Manager mailing address

20322 Mail Service Center

Raleigh NC 27699-0322 USA 919-754-6377 919-715-8551 ben.shelton@nc.gov 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. 20230715 withheld NC Center for Geographic Information and Analysis Project Manager mailing address

20322 Mail Service Center

Raleigh NC 27699-0322 USA 919-754-6377 919-715-8551 ben.shelton@nc.gov 0 Raster Pixel 175104 264192 0.627413 0.630224 8 1 Upper Left FALSE LZ77 4 pixel codes SDR TRUE Coordinate pair 0.5 0.5 U.S. Feet North American Datum of 1983 Geodetic Reference System 80 6378137.0 298.25722210088 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. None David Giordano NC Center for Geographic Information and Analysis Database Administrator mailing

20322 Mail Service Center

Raleigh NC 27699-0322 U.S. 919-754-6585 919-715-8551 david.giordano@nc.gov 0800-1700 M-F EST 1:1200, 0.5-foot pixel digital color orthophotography (2023) The NC Center for Geographic Information and Analysis 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, 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. MRSID 20:1 Compression https://services.nconemap.gov Download NA 20.0 NA Unknown no charge for online distribution. For offline options contact CGIA. Contact CGIA Contact CGIA for custom datasets software that can display a digital image 20240101 20231114 20231114 Ben Shelton NC Center for Geographic Information and Analysis Project Manager mailing

20322 Mail Service Center

Raleigh NC 27699-0322 U.S. 919-754-6377 919-715-8551 ben.shelton@nc.gov 0900-1600 M-F EST FGDC CSDGM FGDC-STD-001-1998 Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362 ORTHOS2023 1 -81.468554 -80.905111 35.439177 35.126007 ORTHOS2023 002 1264711.653309 1430469.030117 509896.334677 620251.139896 1 Projected GCS_NAD_1983_2011 Linear Unit: Foot_US (0.304801) NAD_1983_2011_StatePlane_North_Carolina_FIPS_3200_Ft_US <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.8'><WKT>PROJCS[&quot;NAD_1983_2011_StatePlane_North_Carolina_FIPS_3200_Ft_US&quot;,GEOGCS[&quot;GCS_NAD_1983_2011&quot;,DATUM[&quot;D_NAD_1983_2011&quot;,SPHEROID[&quot;GRS_1980&quot;,6378137.0,298.257222101]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433]],PROJECTION[&quot;Lambert_Conformal_Conic&quot;],PARAMETER[&quot;False_Easting&quot;,2000000.0],PARAMETER[&quot;False_Northing&quot;,0.0],PARAMETER[&quot;Central_Meridian&quot;,-79.0],PARAMETER[&quot;Standard_Parallel_1&quot;,34.33333333333334],PARAMETER[&quot;Standard_Parallel_2&quot;,36.16666666666666],PARAMETER[&quot;Latitude_Of_Origin&quot;,33.75],UNIT[&quot;Foot_US&quot;,0.3048006096012192],AUTHORITY[&quot;EPSG&quot;,6543]]</WKT><XOrigin>-121841900</XOrigin><YOrigin>-93659000</YOrigin><XYScale>36365718.124241434</XYScale><ZOrigin>0</ZOrigin><ZScale>1</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.0032808333333333331</XYTolerance><ZTolerance>2</ZTolerance><MTolerance>2</MTolerance><HighPrecision>true</HighPrecision><WKID>103122</WKID><LatestWKID>6543</LatestWKID></ProjectedCoordinateSystem> 20240202 08161500 20240202 08161500 Raster Dataset dataset EPSG 8.2.10(10.3.1) 20240202