Digital Orthoimagery for Study Area 5 (SA5): Brunswick, Columbus, Duplin, Jones, Lenoir, New Hanover, Pender

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: North Carolina Center for Geographic Information and Analysis
Publication_Date: 20241007
Title:
Digital Orthoimagery for Study Area 5 (SA5): Brunswick, Columbus, Duplin, Jones, Lenoir, New Hanover, Pender
Edition: 1.0
Geospatial_Data_Presentation_Form: Raster digital data
Publication_Information:
Publication_Place: Raleigh, NC
Publisher:
NC Center for Geographic Information and Analysis on behalf of the North Carolina 911 Board
Online_Linkage: https://services.nconemap.gov
Description:
Abstract:
Orthoimagery in North Carolina captured during leaf-off conditions in early 2024, 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 2024. The Program is consistent with the Business Plan for Orthoimagery in North Carolina (http://ncgicc.net/Portals/3/documents/OrthoImageryBusinessPlan_NC_20101029.pdf) that recommends acquisition of one-fourth of the state (or 25 counties) per year in a four-year cycle. The products are orthoimagery in true color, 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 NC Geodetic Survey, 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 2024 and became available by late 2024. Image services are accessible and data are downloadable through NC OneMap. Two airborne acquisition systems comprised of a twin-engine aircraft, a Vexcel UCE-M3 digital airborne sensor, GNSS-IMU and flight management system (FMS) acquired imagery for Brunswick, Columbus, Duplin, Jones, Lenoir, New Hanover and Pender Counties on February 1, 3, 4, 14, 15, 21, and 26, 2024, a total of eleven (11) sorties. Digital airborne imagery was acquired during leaf off, cloud free, 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: 20200202 and the final date of acquisition designated as: 0226. (e.g. OF6i0_37_000_10699102_20200202_0226R0.tif). The raw imagery was post processed using a two-step process to ensure radiometric consistency. Aero-Triangulation was conducted to consolidate the individual images and flight lines into an interconnected block, geo-referenced to the designated project coordinate system and datum to support orthoimage production. The NC Floodplain Mapping QL2 LiDAR was reviewed and updated as necessary at a density level sufficient to accurately represent the shape of the ground and to meet the required accuracy standards. Seamline polygons were manually digitized and updated with attribute fields: FltLineID, ExposureID, VendorID and ImageDate, definitions for these attribute fields can be found in the corresponding seamline metadata file. All seamline polygons were refined during each quality control procedure and applied to each individual orthorectified image to provide the most complete and logical mosaic result possible. Project status was reported to CGIA on a weekly or bi-weekly basis by submitting a formal status report with supporting documentation, a status meeting conference call was held weekly or bi-weekly to review status and discuss action items. All project tasks and sub-tasks were detailed, documented and reported to CGIA in Attachment C: Flight & Control Plan (shows maps, layouts & details for planned flight lines & survey control per study area); Attachment C-1: Control Surveys Report (shows final locations, descriptions & diagrams for survey ground control across the study area); Attachment D: Imagery Acquisition Compliance Report (provides flight acquisition maps, specifications & supporting documentation by AT block across the study area); Attachment E: GNSS-IMU Post Processing and Aero-Triangulation Report (provides flight details, state specification compliance table, software used, GNSS-IMU summary tables, AT statistics and multiple supporting files per AT block); Attachment F: Orthoimagery Delivery Report (per County) and Attachment G: Final Report and Certification (per Study Area).
Purpose:
This dataset was generated to provide a consistent reference map for base mapping and display in emergency 911 operations and GIS applications.
Supplemental_Information:
This county dataset is one of 21 county datasets produced in a quarter-state project. The bounding coordinates in this metadata file represent the bounding coordinates for all image tiles in the project area as a whole, not an individual tile.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20240201
Ending_Date: 20240226
Currentness_Reference: Ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -79.083877
East_Bounding_Coordinate: -77.683408
North_Bounding_Coordinate: 35.384841
South_Bounding_Coordinate: 33.811398
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: orthophotophotography
Theme_Keyword: ortho
Theme_Keyword: true ortho
Theme_Keyword: imagery
Theme_Keyword: piedmont
Theme_Keyword: leaf-off
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: imageryBaseMapsEarthCover, 010
Place:
Place_Keyword_Thesaurus: William S. Powell, The North Carolina GAZETTEER
Place_Keyword: Brunswick County
Place_Keyword: Columbus County
Place_Keyword: Duplin County
Place_Keyword: Jones County
Place_Keyword: Lenoir County
Place_Keyword: New Hanover County
Place_Keyword: Pender County
Place_Keyword: North Carolina
Access_Constraints: None
Use_Constraints:
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.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Ben Shelton
Contact_Organization:
NC Center for Geographic Information and Analysis, Office of Information Technology Services
Contact_Position: Project Manager
Contact_Address:
Address_Type: mailing
Address: 20322 Mail Service Center
City: Raleigh
State_or_Province: NC
Postal_Code: 27699-0322
Country: U.S.
Contact_Voice_Telephone: 919-754-6377
Contact_Facsimile_Telephone: 919-715-0408
Contact_Electronic_Mail_Address: ben.shelton@nc.gov
Hours_of_Service: 0900-1600 M-F EST
Data_Set_Credit:
This collaborative project included significant roles by the following: (1) the North Carolina 911 Board to acquire statewide orthoimagery from 2010-2024; (2) NC Department of Public Safety, Division of Emergency Management, Office of Risk Management 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) NC Department of Transportation provides technical and advisory services for compliance and oversight as well as performing visual quality review for as much as 30% of the imagery deliverables; and (7) 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.
Security_Information:
Security_Classification_System: None
Security_Classification: Unclassified
Security_Handling_Description: None
Native_Data_Set_Environment:
Hexagon Geomedia, Hexagon ImageStation Orthopro, Adobe Photoshop Cloud Native_Data_Set_Format: Raster Orthoimagery Tile (TIFF or MrSID)
Data_Quality_Information:
Logical_Consistency_Report:
Radiometric or visual consistency for Study Area-5 (SA5) was accomplished using a two-step image post processing procedure. The first step was Front-End Post Processing. Primary front-end post processing within the Vexcel UltraMap software uses look-up-tables (LUTs) to provide initial color, tone and contrast solutions for the raw post processed imagery. Upon analyzing and testing random images from initial sorties to develop the preliminary SA5 LUTs, random images from each subsequent sortie were tested using this same LUT, if radiometric continuity within reasonable expectations was achieved, the LUT was applied with no modifications. This technical approach was applied across all UCE-M3 sorties for SA5 and did achieve radiometric consistency within reasonable expectations across the entire study area. The second step of the process was Back-End Post Processing. Upon completing primary post processing, supplementary "back-end" image post processing was applied systematically to ensure radiometric continuity between each flight line, from sortie to sortie, across the entire project study area, and to further ensure compliance with the State specifications and the CO24 image post processing guidelines. Back-End post processing to improve overall radiometric quality and continuity was accomplished using Adobe Photoshop Cloud, Photoshop Bridge and Photoshop Camera Raw. Systematic and or variable adjustments for color, tone and contrast were tested and applied to individual images, flight lines or entire sorties as necessary to correct issues of radiometric inconsistency of unreasonable or unacceptable probability.
Completeness_Report:
Totally interactive mosaic tools and methods were used to provide complete seamless orthoimagery for Study Area-5 (SA5). Seamlines and resulting mosaic polygons were manually reviewed and edited to provide the best and most complete mosaic result possible. All SA5 orthoimage tiles were full tiles, 5,000' x 5,000', with no void areas. All final orthoimage tiles were visually inspected for completeness, no gaps or void areas, radiometry, feature distortion, artifacts, image motion, edge matching and accuracy to ensure compliance to the project scope of work and North Carolina Technical Specifications for Digital Orthophoto Base Mapping, adopted December, 2014.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Technical approach and methods for the final orthoimagery were designed to meet horizontal accuracies at a design scale of 1:1,200 (1'= 100') where the limiting RMSE in either X or Y is not greater than 1.0'. Horizontal accuracy compliance was verified during three separate internal procedures. First, the airborne acquisition systems comprised of two twin engine aircraft, both with a Vexcel UCE-M3 sensors, GNSS-IMU and flight management system (FMS) were approved by acquiring imagery of the North Carolina Validation Range in Surry County, NC, processing the imagery and aero-triangulation as a mini project or expedited sensor system validation procedure including project deliverables, reports or selective tabular data under the CO24 scope of work. The aero-triangulation results and or orthoimage tiles for each Validation Range flight were reviewed and verified by NCDOT and NCGS for accuracy compliance prior to execution of the CO24 project. Second, during the Aero-Triangulation (AT) phase, sixty (60) control points were withheld from the initial AT block adjustment, these points were designated as check points during initial AT block adjustment, reports and statistics for the initial adjustment results and check points were submitted to NCDOT for evaluation to ensure compliance with the designed accuracy requirements. These sixty (60) check points were then included in the final AT block adjustment as control points, the results and statistics were reported to CGIA in Attachment E. Third, all control point positions used for Study Area-5 (SA5) reported in Attachment C-1, were visually inspected in ESRI ArcGIS 10.8 against the final geo-referenced orthoimagery to ensure the horizontal position of each point as it appeared in the orthoimage met the horizontal accuracy requirement when compared to its actual surveyed coordinates. This step will also be validated by NCGS using Compass Data Accuracy Analyst software to generate final project accuracy compliance reports and statistics.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: There is no vertical component for this set of orthoimagery.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Spatial Data Consultants, Inc.
Publication_Date: 20231214
Title:
Imagery Acquisition Flight and Ground Control Plan, Attachment-C
Edition: 1.0
Geospatial_Data_Presentation_Form:
Microsoft Word DOC, UCE-M3 Flight Files, Excel Spreadsheets, ESRI Shapefiles, Camera Calibration Reports, Adobe PDF Maps
Publication_Information:
Publication_Place: Hight Point, NC
Publisher: Spatial Data Consultants, Inc.
Type_of_Source_Media: FTP
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20231214
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: FLGCPLN
Source_Contribution:
The Imagery Acquisition and Ground Control Plan, Attachment-C, once approved by CGIA and NCDOT provided the source data, materials and technical plan to execute the ground control and imagery acquisition phases outlined in Sub-Tasks 1.9 and 2.1 under the CO24 Scope of work.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Keystone Aerial Surveys, Inc., A Vexcel Company
Publication_Date: 20240315
Title: UCE-M3 Digital Airborne Imagery
Edition: 1.0
Geospatial_Data_Presentation_Form: Raster TIFF
Publication_Information:
Publication_Place: Hight Point, NC and Philadelphia, PA
Publisher:
Spatial Data Consultants, Inc. and Keystone Aerial Surveys, Inc.
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 20240201
Single_Date/Time:
Calendar_Date: 20240226
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: DAIMGRY
Source_Contribution:
The UCE-M3 digital airborne imagery captured during February, 2024, served as the foundation image component for Study Area-5 (SA5). The raw imagery was collected at an altitude of approximately 11,544'+/- above mean terrain elevation (AMT). The imagery was collected in a proprietary RAW image format at 14-bit resolution per pixel and post processed as a 4-band (RGB-IR), 8-bit, uncompressed TIFF raster image file, tiled at 256 with averaged overviews. The final post processed 4-band, 8-bit, TIFF images were used during the Aero-Triangulation, DEM update, Seamline generation and orthoimage production phases.
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Keystone Aerial Surveys, Inc., A Vexcel Company, A Vexcel Company
Publication_Date: 20240315
Title: GNSS and Inertial Measurement Unit (IMU) Data
Edition: 1.0
Geospatial_Data_Presentation_Form: ASCII Text
Publication_Information:
Publication_Place: Hight Point, NC and Philadelphia, PA
Publisher:
Spatial Data Consultants, Inc. and Keystone Aerial Surveys, Inc., A Vexcel Company, A Vexcel Company
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 20240201
Single_Date/Time:
Calendar_Date: 20240226
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: GNSSIMU
Source_Contribution:
The GNSS data provides accurate geodetic coordinates for the nadir point of each 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 GNSS coordinates and IMU orientation angle values play a key role in the success and accuracy of the Aero-Triangulation process by supplementing the field survey ground control, thus saturating the project study area with control. The GNSS coordinates were expressed horizontally in NC SPC NAD83 (2011, Epoch 2010), US Survey Feet and vertically in NAVD 1988 (Geoid-18), US Survey Feet. The omega, phi and kappa IMU orientation angles were expressed in decimal degrees.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Spatial Data Consultants, Inc.
Publication_Date: 20240112
Title: GPS Ground Control
Edition: 1.0
Geospatial_Data_Presentation_Form: ASCII Text
Publication_Information:
Publication_Place: High Point, NC
Publisher: Spatial Data Consultants, Inc.
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 20231215
Single_Date/Time:
Calendar_Date: 20240105
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: GPSCTRL
Source_Contribution:
The GPS Ground Control documented in the Study Area-5 (SA5) Attachment C-1 Control Surveys Report provided precise geodetic coordinates and elevations for pre-paneled and photo-identifiable positions throughout SA5. These control point positions were measured along with pass and tie points on the imagery during the relative orientation Aero-Triangulation (AT) measurement process, the precise coordinate values along with the GNSS-IMU data were then applied in an absolute AT adjustment in order to accurately control and geo-reference each AT block and to validate the control and check points used during the process. The precise ground control coordinates were also used during the accuracy quality control process; the locations of the pre-paneled and photo-identifiable points as they appeared in the final orthoimagry were compared to their precise coordinates in ESRI ArcGIS 10.8 to ensure compliance with the stated accuracy requirements. The control coordinates were expressed horizontally in NC SPC NAD83 (2011, Epoch 2010), US Survey Feet and vertically in NAVD 1988 (Geoid-18), US Survey Feet.
Source_Information:
Source_Citation:
Citation_Information:
Originator: NC Department of Transportation
Publication_Date: 2024
Title: NCDOT Bridge Locations
Edition: 1.0
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: 2024
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: BRDGLOC
Source_Contribution:
The NCDOT Bridge Location shapefile was converted to Microstation DGN format and utilized during sub-task 3.5, LiDAR DEM update and during Internal Level-1 Macro (IL1M) quality control review process to visit each bridge location in the orthoimagery within Study Area-5 (SA5) to ensure no distortion was introduced to the bridge, overpass or culvert by the original NC Floodplain Mapping QL1 and QL2 LiDAR at each location.
Source_Information:
Source_Citation:
Citation_Information:
Originator: NC Department of Transportation
Publication_Date: 2024
Title: NCDOT Construction History
Edition: 1.0
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: 2024
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: CONHIST
Source_Contribution:
The NCDOT Construction History shapefile was converted to Microstation V8i DGN format and utilized during the NC Floodplain Mapping QL1 and QL2 LiDAR review and update sub-task 3.5. The construction history data was referenced to the NC Floodplain Mapping QL2 LiDAR bare earth data in 3D utilizing DATEM Summit Evolution Pro, a 3D Photogrammetry production software platform, interactive 3D stereo tools were used to update the LiDAR elevation points in areas where new construction had added new infrastructure or reformed the shape of the terrain.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Geospatial & Technology Management Office
Publication_Date: 2024
Title:
NC Emergency Management (NCEM) 2020 QL1 and 2014 & 2015 QL2 LIDAR digital elevation model
Edition: 1.0
Geospatial_Data_Presentation_Form: ESRI Shapefile
Publication_Information:
Publication_Place: Raleigh
Publisher: Geospatial & Technology Management Office
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2020
Source_Currentness_Reference: Ground condition
Source_Citation_Abbreviation: LIDAR DEM
Source_Contribution:
The 2020 QL1 and 2014 & 2015 QL2 LIDAR digital elevation data used for the rectification of the orthophotos was provided by the Geospatial & Technology Management Office.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Geospatial & Technology Management Office
Publication_Date: 20240402
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: 20240402
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: 20240402
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: 20240402
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:
North Carolina Validation Range. Each pre-validated airborne acquisition system used for the Coastal Orthoimagery 2024 Project (CO24) was comprised of a twin-engine aircraft, UCE-M3 Digital Airborne Sensor (SNs 17043 and 19383), Applanix POS AV-510 Inertial Position and Orientation System and Vexcel UltraNav flight management system (FMS) was approved by acquiring digital airborne imagery, GNSS-IMU data over the North Carolina Validation Range in Surry County, NC. Spatial Data Consultants, Inc. (SDC) processed the exploitation imagery and aero-triangulation as a mini project or expedited sensor system validation procedure including project deliverables, reports or selective tabular data under the CO24 scope of work. The aero-triangulation (AT) results and exploitation imagery for each Validation Range mission were reviewed and verified by NCDOT and NCGS for compliance with the North Carolina Technical Specifications for Digital Orthophoto Base Mapping, adopted December, 2014 and the stated horizontal accuracy requirements prior to execution of the CO24 project. The processes and results for each acquisition system verified under the Validation Range procedure were reported and documented in or under portions of Attachment C, D, and E. These Attachments are obtainable from CGIA.
Source_Used_Citation_Abbreviation: NCVR
Process_Date: 20230227
Source_Produced_Citation_Abbreviation: CAMAPRVL
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Spatial Data Consultants, Inc.
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 1008 Hutton Lane
Address: Suite 109
City: High Point
State_or_Province: NC
Postal_Code: 27262
Country: USA
Contact_Voice_Telephone: 336-841-1247
Contact_Facsimile_Telephone: 336-841-1248
Contact_Electronic_Mail_Address: mschall@spatialdc.com
Process_Step:
Process_Description:
Imagery Acquisition Flight and Ground Control Planning. Spatial Data Consultants, Inc. (SDC), and our project team member Keystone Aerial Surveys, Inc., A Vexcel Company (KAS) jointly planned and identified flight and control plans for CO24 SA5 in compliance with the North Carolina Technical Specifications for Digital Orthophoto Base Mapping, adopted December, 2014. Preliminary flight and control plans in the form of Attachment-C were submitted to CGIA and NCDOT for approval prior to execution of CO24 Project Task-2. The flight and control plan for SA5 detailed in Attachment-C is obtainable from CGIA. Flight plans were based on north-south oriented flight lines. The Flight and Control Plan included one (1) logical Aero-Triangulation (AT) block within SA5.
Source_Used_Citation_Abbreviation: FLGCPLN
Process_Date: 20231214
Source_Produced_Citation_Abbreviation: DAIMGRY, GPSCTRL
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Spatial Data Consultants, Inc.
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 1008 Hutton Lane
Address: Suite 109
City: High Point
State_or_Province: NC
Postal_Code: 27262
Country: USA
Contact_Voice_Telephone: 336-841-1247
Contact_Facsimile_Telephone: 336-841-1248
Contact_Electronic_Mail_Address: mschall@spatialdc.com
Process_Step:
Process_Description:
Selection, Targeting and GPS Ground Control Survey. Spatial Data Consultants, Inc. (SDC) recovered and targeted using paint, vinyl or thermal plastic material, or selected photo-identifiable features as necessary, for one-hundred eighty-six (186) new or existing points selected as control for the Coastal Orthoimagery 2024 Project (CO24). Another twenty-one (21) points were obtained from adjoining Vendors and used as control, for a total of three hundred seventy-two (372) control points. Five (5) control points were omitted from the Aero-Triangulation process, for a total of three hundred sixty-seven (367) total control points used for CO24. A total of sixty (60) of the one-hundred eighty-six (186) control points, evenly distributed throughout Study Area 4 (SA5), with a minimum of two (2) per County, were used as check points during the initial Aero-Triangulation (AT) adjustment for quality control analysis, then later enabled as control for the final AT adjustment for each AT-block prior to Orthoimage production. All recovered and/or newly surveyed control points were referenced horizontally to NC SPC, NAD83 (2011, Epoch 2010) US Survey Feet, and vertically to NAVD88 (GEIOD18). A Control Surveys Report, Attachment C-1 was signed and sealed by the North Carolina Professional Land Surveyor (PLS) in responsible charge and was submitted to CGIA and NCGS for approval and acceptance. Attachment C-1 is obtainable from CGIA.
Source_Used_Citation_Abbreviation: PPGPSSY
Process_Date: 20240112
Source_Produced_Citation_Abbreviation: GPSCTRL
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Spatial Data Consultants, Inc.
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 1008 Hutton Lane
Address: Suite 109
City: High Point
State_or_Province: NC
Postal_Code: 27262
Country: USA
Contact_Voice_Telephone: 336-841-1247
Contact_Facsimile_Telephone: 336-841-1248
Contact_Electronic_Mail_Address: mschall@spatialdc.com
Process_Step:
Process_Description:
UCE-M3 Digital Airborne Imagery, GNSS-IMU raw data acquisition. With consideration to geographic location, vegetation, weather conditions, PDOP, ground control and other relative ground or atmospheric conditions, the Digital Aerial Imagery, GNSS-IMU raw data was acquired in the most efficient time frame possible beginning February 1, 2024 and ending February 26, 2024, a total of eleven (11) sorties for Study Area-5 (SA5). Keystone Aerial Surveys, Inc., A Vexcel Company (KAS), under the direction of Spatial Data Consultants, Inc., (SDC) acquired digital aerial imagery utilizing two (2) Vexcel UCE-M3 digital airborne sensors, (17043 and 19383) controlled by Microsoft UltraNav Flight Management and Control Hardware-Software (FMS). Raw GNSS-IMU data was collected utilizing Applanix POS-AV 510-5771. Airborne acquisition was conducted during leaf off, cloud free, 33-degree sun angle conditions, in compliance with the North Carolina Technical Specifications for Digital Orthophoto Base Mapping, adopted December, 2014. Airborne acquisition tasks were detailed in Attachment-D, per AT block, submitted to CGIA and NCDOT for acceptance and approval. Attachment D is obtainable from CGIA.
Source_Used_Citation_Abbreviation: AIRAQSN
Process_Date: 20240226
Source_Produced_Citation_Abbreviation: DAIMGRY, GNSSIMU
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Keystone Aerial Surveys, Inc., A Vexcel Company
Contact_Position: Sub-Consultant
Contact_Address:
Address_Type: mailing and physical address
Address: Northeast Philadelphia Airport
City: Philadelphia
State_or_Province: PA
Postal_Code: 19114
Country: USA
Contact_Voice_Telephone: 215-677-3119
Contact_Facsimile_Telephone: 215-464-2889
Contact_Electronic_Mail_Address: jschmitt@kasurveys.com
Process_Step:
Process_Description:
Digital Airborne Imagery Post Processing, Front-End. The RAW digital airborne imagery was post processed using a two-step image post processing procedure with concern for radiometric and visual consistency across Study Area-5 (SA5) in consideration of exploitation land cover samples provided by CGIA and NCDOT. The first step was Front-End Post Processing. Primary front-end post processing within the Vexcel UltraMap workflow uses look-up-tables (LUTs) to provide initial color, tone and contrast solutions for the raw post processed imagery. Upon analyzing and testing random images from initial sorties to develop preliminary LUTs, random images from each subsequent sortie were tested using this same LUT, if radiometric continuity within reasonable expectations was achieved, the LUT was applied with no modifications. This technical approach was applied across all sorties for SA5 and did achieve radiometric consistency within reasonable expectations across the entire study area.
Source_Used_Citation_Abbreviation: DAIPPFE
Process_Date: 20240315
Source_Produced_Citation_Abbreviation: DAIMGRY
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Keystone Aerial Surveys, Inc., A Vexcel Company
Contact_Position: Sub-Consultant
Contact_Address:
Address_Type: mailing and physical address
Address: Northeast Philadelphia Airport
City: Philadelphia
State_or_Province: PA
Postal_Code: 19114
Country: USA
Contact_Voice_Telephone: 215-677-3119
Contact_Facsimile_Telephone: 215-464-2889
Contact_Electronic_Mail_Address: jschmitt@kasurveys.com
Process_Step:
Process_Description:
Digital Airborne Imagery Post Processing, Back-End. The second step of the process was Back-End Post Processing. Upon completing primary post processing within the UltraMap workflow, supplementary "back-end" image post processing was applied systematically to ensure radiometric continuity between each flight line, from sortie to sortie, across the entire project study area, and to further ensure compliance with the State specifications and the CO24 "Exploitation Image Sample" image post processing guidelines. Back-End post processing to improve overall radiometric quality and continuity was accomplished using Adobe Photoshop Cloud, Photoshop Bridge and Photoshop Camera Raw. Systematic and or variable adjustments for color, tone and contrast were tested and applied to individual images, flight lines or entire sorties as necessary to correct issues of radiometric inconsistency of unreasonable or unacceptable probability. Final digital airborne images were post processed as a 4-band (RGB-IR), 8-bit, uncompressed TIFF raster image file, tiled at 256. Digital airborne image post processing was conducted in compliance with the North Carolina Technical Specifications for Digital Orthophoto Base Mapping, adopted December, 2014 and the CO24 "Land Cover Samples" image Post processing guidelines.
Source_Used_Citation_Abbreviation: DAIPPBE
Process_Date: 20240419
Source_Produced_Citation_Abbreviation: DAIMGRY
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Spatial Data Consultants, Inc.
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 1008 Hutton Lane
Address: Suite 109
City: High Point
State_or_Province: NC
Postal_Code: 27262
Country: USA
Contact_Voice_Telephone: 336-841-1247
Contact_Facsimile_Telephone: 336-841-1248
Contact_Electronic_Mail_Address: mschall@spatialdc.com
Process_Step:
Process_Description:
GNSS and Inertial Measurement Unit (IMU) Post Processing. Keystone Aerial Surveys, Inc., A Vexcel Company (KAS) conducted initial airborne GNSS-IMU post processing utilizing Virtual Base Station with Spatial Data Consultants, Inc. (SDC) performing peer review quality control and final process certification. KAS-SDC post processed the GNSS data relative to simultaneous observations collected at fixed land-based reference stations. Geodetic positions corresponding to the nadir point (photo center) for each exposure was calculated and later used to support surveyed ground control during Aero-Triangulation. The sensor perspective centers were accurately surveyed and located offsets with respect to the GPS antenna positions. A minimum of two (2) static GPS reference stations were used while recording data over Study Area-5 (SA5). In all cases NC CORS maintained by North Carolina Geodetic Survey was used and was active during each sortie. The satellite Geometry (PDOP or GDOP) was not be greater than three (3) for 90 percent of the flight lines and not greater than five (5) for the remaining 10 percent. The solution for each sortie was post-processed backward and forward to eliminate errors. GNSS-IMU post processing was conducted in compliance with the North Carolina Technical Specifications for Digital Orthophoto Base Mapping, adopted December, 2014. GNSS-IMU post processing procedures and results were detailed in Attachment-E, per AT block, submitted to CGIA and NCDOT for acceptance and approval. Attachment E is obtainable from CGIA. The final GNSS coordinates were expressed horizontally in NC SPC NAD83 (2011, Epoch 2010), US Survey Feet and vertically in NAVD 1988 (Geoid-18). The omega, phi and kappa IMU orientation angles were expressed in decimal degrees.
Source_Used_Citation_Abbreviation: GSIMUPP
Process_Date: 20240301
Source_Produced_Citation_Abbreviation: GNSSIMU
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Keystone Aerial Surveys, Inc., A Vexcel Company
Contact_Position: Sub-Consultant
Contact_Address:
Address_Type: mailing and physical address
Address: Northeast Philadelphia Airport
City: Philadelphia
State_or_Province: PA
Postal_Code: 19114
Country: USA
Contact_Voice_Telephone: 215-677-3119
Contact_Facsimile_Telephone: 215-464-2889
Contact_Electronic_Mail_Address: jschmitt@kasurveys.com
Process_Step:
Process_Description:
Digital Softcopy Aero-Triangulation. Spatial Data Consultants, Inc. (SDC) completed all phases of Digital Softcopy Aero-Triangulation (AT) for one (1) AT block (AT01) across Study Area-5 (SA5), using eleven (11) sorties, totaling five-thousand nine-hundred sixty-two (5,962) UCE-M3 digital sensor images flown from February 1, 2024 to February 26, 2024. The eleven (11) sorties used during AT processing included fifty-four (54) 60% forward overlap and 35% side overlap flight lines for the SA5 Stereo Exploitation Image Boundary and ten (9) 80% forward overlap, 80% side overlap or nadir flight lines for the core downtown area of Wilmington and random bridges. The purpose of the AT is to verify survey ground control and increase the density of photo control resulting in sufficient control for the orientation of stereo models for 3D softcopy applications and individual image exterior orientation parameters ( X, Y, Z, Omega, Phi, Kappa) necessary for Orthoimagery production. A Hexagon SSK (Stereo Softcopy Kit) and Windows 10 workstation were used to prepare and process the aero-triangulation for this project. Hexagon ImageStation Automatic Triangulation (ISAT), including ImageStation Photogrammetric Manager (ISPM) were used to manually measure and process the GNSS-IMU data, ground control, pass and tie points in a simultaneous bundle adjustment to compute exterior orientation parameters, pass, tie and ground control point coordinates in a simultaneous bundle block adjustment. The final pass, tie and control point coordinates derived from the AT were expressed horizontally in NC SPC NAD83 (2011, Epoch 2010), US Survey Feet and vertically in NAVD 1988 (Geoid-18), US Survey Feet. The exterior orientation parameters X, Y and Z were expressed horizontally in NC SPC NAD83 (2011, Epoch 2010), US Survey Feet and vertically in NAVD 1988 (Geoid-18). The exterior orientation angles omega, phi and kappa were expressed in decimal degrees. The AT process was conducted in compliance with the North Carolina Technical Specifications for Digital Orthophoto Base Mapping, adopted December, 2014. AT procedures and results were detailed in Attachment-E, per AT block, submitted to CGIA and NCDOT for acceptance and approval. Attachment E for AT01 is obtainable from CGIA.
Source_Used_Citation_Abbreviation: DAIMGRY, GNSSIMU, GPSCTRL
Process_Date: 20240402
Source_Produced_Citation_Abbreviation: DIGSCAT
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Spatial Data Consultants, Inc.
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 1008 Hutton Lane
Address: Suite 109
City: High Point
State_or_Province: NC
Postal_Code: 27262
Country: USA
Contact_Voice_Telephone: 336-841-1247
Contact_Facsimile_Telephone: 336-841-1248
Contact_Electronic_Mail_Address: mschall@spatialdc.com and
Process_Step:
Process_Description:
LiDAR DEM Review and Update. Spatial Data Consultants, Inc. (SDC) reviewed, edited and updated the NC Floodplain Mapping QL1 and QL2 LiDAR elevation data (as needed) at a density level sufficient to accurately represent the shape of the ground and to meet the required horizontal accuracy for cultural features at a design scale of 1:1,200 (1'= 100') where the limiting RMSE in either X or Y is not greater than 1.0'. NCDOT provided a construction history shapefile which was converted to Microstation DGN format and utilized during the NC Floodplain Mapping QL1 and QL2 LiDAR review and update task. The Microstation DGN format construction history data was referenced to the NC Floodplain Mapping QL1 and QL2 LiDAR bare earth data in 3D utilizing DATEM Summit Evolution Pro, a 3D Photogrammetry production software platform, interactive 3D stereo tools were used to update the LiDAR elevation points in areas where new construction had added new infrastructure or reformed the shape of the terrain. In addition to the construction history shapefile, NCDOT provided a bridge location shapefile which was also converted to Microstation DGN format and utilized during sub-task 3.5 and Internal Level-1 Macro Quality Review (L1MQR) processes to visit each bridge location within Study Area-5 (SA5) to ensure no distortion was introduced to the bridge, overpass or culvert by the existing NC Floodplain Mapping QL1 and QL2 LiDAR at each location in the file. Additional LiDAR DEM updates were made as a result of L1MQR quality control and iNSITE quality control resolutions reported and documented in Attachment-F. Attachment-F is obtainable from CGIA.
Source_Used_Citation_Abbreviation: DAIMGRY, DIGSCAT, CONHIST, LIDAR DEM
Process_Date: 20240917
Source_Produced_Citation_Abbreviation: DEMRWUP
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Spatial Data Consultants, Inc.
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 1008 Hutton Lane
Address: Suite 109
City: High Point
State_or_Province: NC
Postal_Code: 27262
Country: USA
Contact_Voice_Telephone: 336-841-1247
Contact_Facsimile_Telephone: 336-841-1248
Contact_Electronic_Mail_Address: mschall@spatialdc.com
Process_Step:
Process_Description:
Preliminary Orthoimage Rectification. Spatial Data Consultants, Inc. (SDC) utilized Hexagon Geomedia Pro, ImageStation Orthopro (ISOP) and Vexcel UltraMap to process the exploitation imagery, the final aero-triangulation (AT) data files and updated LiDAR DEM elevation data to produce preliminary orthorectified images. The preliminary orthoimages were used for the purpose of visual internal quality control and for manual seamline polygon digitizing. During the manual seamline digitizing process, each image was cursory inspected visually for overall image quality, distortion due to erroneous LiDAR data, artifacts, clouds, cloud shadows, smoke or any other anomaly that would not comply with the North Carolina Technical Specifications for Digital Orthophoto Base Mapping, adopted December, 2014. The NCDOT bridge location data was also used during this process step to visit each bridge, overpass or major culvert location to determine if special DEM treatment would be necessary to remove distortion from these features. Any problem or issue detected during this process step along with its predicted resolution was recorded graphically and as tabular data in ESRI ArcGIS 10.8. The preliminary orthoimages were not reused later in the final mosaic process step.
Source_Used_Citation_Abbreviation: DAIMGRY, DIGSCAT, LIDAR DEM, DEMRWUP
Process_Date: 20240412
Source_Produced_Citation_Abbreviation: PREORRN
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Spatial Data Consultants, Inc.
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 1008 Hutton Lane
Address: Suite 109
City: High Point
State_or_Province: NC
Postal_Code: 27262
Country: USA
Contact_Voice_Telephone: 336-841-1247
Contact_Facsimile_Telephone: 336-841-1248
Contact_Electronic_Mail_Address: mschall@spatialdc.com
Process_Step:
Process_Description:
Seamline Digitizing and Seamline Polygon Generation. Spatial Data Consultants, Inc. used Bentley Microstation to manually digitize seamlines between orthoimages within the same flight line and between orthoimages from adjacent flight lines, then visually inspected the seamlines to detect incorrect or inappropriate placement. All seamlines were manually digitized in order to produce the best possible mosaic result across Study Area-5 (SA5). The seamlines and resulting seamline polygons were visually inspected, refined and updated throughout the remaining production and quality control process steps as resolutions for seamline issues were required. Final seamline polygon data was delivered in ESRI ArcGIS 10.8 shapefile format with the following attributes: FltLineID, ExposureID, VendorID and ImageDate.
Source_Used_Citation_Abbreviation: PREORRN
Process_Date: 20240503
Source_Produced_Citation_Abbreviation: MANSEAM
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Spatial Data Consultants, Inc.
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 1008 Hutton Lane
Address: Suite 109
City: High Point
State_or_Province: NC
Postal_Code: 27262
Country: USA
Contact_Voice_Telephone: 336-841-1247
Contact_Facsimile_Telephone: 336-841-1248
Contact_Electronic_Mail_Address: mschall@spatialdc.com
Process_Step:
Process_Description:
Final Image Processing Adjustments. Final radiometric adjustment for color, tone, contrast and clarity of the final orthoimage DO tiles were applied based on the CGIA-DOT SharePoint notification and feedback for the evaluation of Task 3.8, preliminary study area orthoimgery web mapping service (WMS).
Source_Used_Citation_Abbreviation: DAIMGRY
Process_Date: 20240510
Source_Produced_Citation_Abbreviation: BEIMGRY
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Spatial Data Consultants, Inc.
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 1008 Hutton Lane
Address: Suite 109
City: High Point
State_or_Province: NC
Postal_Code: 27262
Country: USA
Contact_Voice_Telephone: 336-841-1247
Contact_Facsimile_Telephone: 336-841-1248
Contact_Electronic_Mail_Address: mschall@spatialdc.com
Process_Step:
Process_Description:
Final Orthoimage Rectification. Spatial Data Consultants, Inc. (SDC) utilized Hexagon Geomedia Pro, ImageStation Orthopro (ISOP) and Vexcel UltraMap to process the final back-end adjusted exploitation imagery, the final aero-triangulation (AT) data files and updated LiDAR DEM elevation data where necessary, to produce final orthorectified images. Final orthoimages incorporated all resolutions for any distortion due to erroneous LiDAR data, artifacts, clouds, cloud shadows, smoke or any other anomaly that would not comply with the North Carolina Technical Specifications for Digital Orthophoto Base Mapping, adopted December, 2014; detected and recorded during the internal cursory inspection of the preliminary orthoimages, manual seamline digitizing or comparing the NCDOT bridge location or construction data. The final orthoimages were used in the final mosaic process step.
Source_Used_Citation_Abbreviation: BEIMGRY, DIGSCAT, LIDAR DEM, DEMRWUP
Process_Date: 20240610
Source_Produced_Citation_Abbreviation: FINORRN
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Spatial Data Consultants, Inc.
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 1008 Hutton Lane
Address: Suite 109
City: High Point
State_or_Province: NC
Postal_Code: 27262
Country: USA
Contact_Voice_Telephone: 336-841-1247
Contact_Facsimile_Telephone: 336-841-1248
Contact_Electronic_Mail_Address: mschall@spatialdc.com
Process_Step:
Process_Description:
Orthoimage Tile Mosaic Processing. Spatial Data Consultants, Inc. (SDC) utilized Hexagon Geomedia Pro, ImageStation Orthopro (ISOP) and Vexcel UltraMap to produce seamline polygons which are applied to the final orthorectified exploitation images during the final mosaic process step. A product definition file was imported into ISOP using Hexagon Product Editor, the product definitions represented the 5,000' x 5,000' orthoimage tiles required for Study Area-5 (SA5) as defined in the geodatabase, CO24.gdb, 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, which incorporates final mosaic color and tone balance processing. All SA5 final orthoimages, mosaic polygons and product definitions were processed simultaneously to ensure the final mosaic output, edge matching, color and tone balancing was absolutely consistent across the entire study area. Processing of separate blocks of final orthoimage tiles may have resulted in slight color or tone mismatches along edges of separately post processed blocks. The orthoimage tiles were named using the required file naming convention (example: OF6i0_37_000_ 20234501_20240201_0226R0.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 iNSITE and Attachment-F. Delivery of the final orthoimage tiles and ancillary data was documented and reported in Attachment-F. Attachment-F is obtainable from CGIA.
Source_Used_Citation_Abbreviation: FINORRN, MANSEAM
Process_Date: 20240617
Source_Produced_Citation_Abbreviation: OIMGTILE
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Spatial Data Consultants, Inc.
Contact_Position: Prime Vendor
Contact_Address:
Address_Type: mailing and physical address
Address: 1008 Hutton Lane
Address: Suite 109
City: High Point
State_or_Province: NC
Postal_Code: 27262
Country: USA
Contact_Voice_Telephone: 336-841-1247
Contact_Facsimile_Telephone: 336-841-1248
Contact_Electronic_Mail_Address: mschall@spatialdc.com
Process_Step:
Process_Description:
Visual quality control consisted of multiple levels of review. Project Vendors conducted initial Level-1 Macro Quality Review (L1MQR) of all orthoimage tiles. After the data was released to the State, NCDOT reviewed 30% of each county's orthoimage tiles, CGIA reviewed 5% and the counties had the ability to review the full county worth of data and were provided a list of 25% of 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 contractors' assessment and evaluation were conducted in a cloud-hosted environment accessible through an online mapping interface called iNSITE.
Source_Used_Citation_Abbreviation: OIMGSERV
Process_Date: 20240913
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: 919-754-6589
Contact_Facsimile_Telephone: 919-715-8551
Contact_Electronic_Mail_Address: darrin.smith@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: 2024
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NC Geodetic Survey
Contact_Position: Director
Contact_Address:
Address_Type: 4105 Reedy Creek Road
Address: Bowers Building
City: Raleigh
State_or_Province: NC
Postal_Code: 27607
Country: USA
Contact_Voice_Telephone: 919-948-7844
Contact_Facsimile_Telephone: 919-733-4407
Contact_Electronic_Mail_Address: gary.thompson@ncdps.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 CO20 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: 2024
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: 919-715-0408
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 if applicable.
Source_Used_Citation_Abbreviation: MRSID
Process_Date: 2024
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: 919-715-0408
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 drive 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: 2024
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: 919-715-0408
Contact_Electronic_Mail_Address: ben.shelton@nc.gov
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: 0.5
Ordinate_Resolution: 0.5
Planar_Distance_Units: U.S. Feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983(2011, Epoch 2010) Epoch 2010.00
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: David Giordano
Contact_Organization: NC Center for Geographic Information and Analysis
Contact_Position: Database Administrator
Contact_Address:
Address_Type: mailing
Address: 20322 Mail Service Center
City: Raleigh
State_or_Province: NC
Postal_Code: 27699-0322
Country: U.S.
Contact_Voice_Telephone: 919-754-6585
Contact_Facsimile_Telephone: 919-715-8551
Contact_Electronic_Mail_Address: david.giordano@nc.gov
Hours_of_Service: 0800-1700 M-F EST
Resource_Description: NC 1:2400, 0.5-foot pixel digital color orthophotography (2024)
Distribution_Liability:
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: MRSID 20:1 Compression
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://services.nconemap.gov
Access_Instructions: Download
Offline_Option:
Offline_Media: None
Recording_Capacity:
Recording_Density: 0
Recording_Density_Units: None
Recording_Format: Unknown
Fees:
no charge for online distribution. For offline options contact CGIA.
Ordering_Instructions: Contact CGIA
Custom_Order_Process: Contact CGIA for custom datasets
Technical_Prerequisites: software that can display a digital image
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2024
Metadata_Reference_Information:
Metadata_Date: 20240919
Metadata_Review_Date: 20240919
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Ben Shelton
Contact_Organization: NC Center for Geographic Information and Analysis
Contact_Position: Project Manager
Contact_Address:
Address_Type: mailing
Address: 20322 Mail Service Center
City: Raleigh
State_or_Province: NC
Postal_Code: 27699-0322
Country: U.S.
Contact_Voice_Telephone: 919-754-6377
Contact_Facsimile_Telephone: 919-715-0408
Contact_Electronic_Mail_Address: ben.shelton@nc.gov
Hours_of_Service: 0900-1600 M-F EST
Metadata_Standard_Name: FGDC CSDGM
Metadata_Standard_Version: FGDC-STD-001-1998
Generated by mp version 2.9.50 on Tue Jan 07 16:02:06 2025