USGS High Resolution Orthoimagery for Wake County, North Carolina: 17SQV020885_201302_0x1500m_CL_2

Metadata Updated: November 19, 2015

"Orthoimagery in Wake County, North Carolina captured in leaf-off conditions in early 2013, 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 in 2012 and 2013 and published for 25 counties in the coastal region and eastern piedmont of North Carolina. The NC 911 Board funded the 2013 acquisition as well as the coastal 2012 and statewide collection in 2010. The 2013 project is consistent with the Business Plan for Orthoimagery in North Carolina ( 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 the NC Geodetic Survey, the NC Department of Transportation's Photogrammetry Unit, and the Land Remdattimcords 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 Committees Working Group for Orthophotography Planning provided technical advice. Images were collected with digital cameras in early 2013, image processing and quality control occurred through 2013, and products became available by early 2014. Image services are accessible and data are downloadable through NC OneMap. The digital imagery for Wake County was acquired from February 1 to March 9, 2013. The orthophoto tile naming convention utilizes the NC statewide index and uses the following parameters: OC is the 2 digit product code, O=orthoimagery, C=color 6io is the 3 digit pixel size for 6-inch imagery 37 is the 2 digit NC ANSI (FIPS) code 000 is the 3 digit alpha numeric custodian code, Code "000" represents state maintained data "20765400" is the map index number. It is an 8 digit SOS LRM numbering of the basic modular unit with millionth place digit. 20130201 is the 8 digit date (YYYYMMDD) representing the starting flight date for the county 0309R0 is the 4 digit data (MMDD) representing the ending flight date for the county followed by the revision number for that tile. Seamline polygons buffered by a minimum 5000' are also available in Shapefile format for the county. Each Shapefile contains the following fields: Vendor ID, Strip ID (flight line), Exposure ID, Date Flown. Technical reports were created across the project study area and include the following: Attachment C: Flight & Control Plan (shows maps, layouts & details for planned flight lines & survey control per study area) Attachment C-1: Control Surveys Rerport (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: Airborne GPS-IMU Post Processing & Aerotriangulation Report (provides flight details, state specification compliance table, software used, GPS-IMU summary tables, AT statistics and multiple supporting tables/files per AT block) In addition supporting documentation was created for each county and includes the following: Attachment F Report: Signed and Sealed Orthoimagery Delivery Report Attachment G Report: Quality Review Issues and Resolutions Report" An orthoimage is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orientation have been mathematically removed. Orthoimagery combines the image characteristics of a photograph with the geometric qualities of a map. There is no image overlap between adjacent files. Data received at Earth Resources Observation and Science Center (EROS) were reprojected from: Projection: NAD_1983_StatePlane_North_Carolina_FIPS_3200_Feet Resolution: 6 inch Type: Natural Color to: Standard Product Projection: NAD_1983_UTM_Zone_17N Standard Product Resolution: 0.1500 m Rows: 10000 Columns: 10000 and resampled to align to the U.S. National Grid (USNG) using The National Map. The naming convention is based on the U.S. National Grid (USNG), taking the coordinates of the SW corner of the orthoimage. The metadata were imported and updated for display through The National Map at Chip-level metadata are provided in HTML and XML format. Data were compressed utilizing IAS software. The compression was JPEG2000 Lossy Compressed. The file format created was .jp2.

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Metadata Date November 18, 2015
Metadata Created Date November 19, 2015
Metadata Updated Date November 19, 2015
Reference Date(s) January 1, 2014 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from USGS High Resolution Orthoimagery Collection - Current

Graphic Preview

Tiled High Resolution Orthoimagery Browse Image

Additional Metadata

Resource Type Dataset
Metadata Date November 18, 2015
Metadata Created Date November 19, 2015
Metadata Updated Date November 19, 2015
Reference Date(s) January 1, 2014 (publication)
Responsible Party U.S. Geological Survey (Point of Contact)
Contact Email
Access Constraints 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." There is no guarantee of warranty concerning the accuracy of the data. Users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to for the USGS disclaimer., Access Constraints: Any downloading and use of these data signifies a user's agreement to comprehension and compliance of the USGS Standard Disclaimer. Insure all portions of metadata are read and clearly understood before using these data in order to protect both user and USGS interests.
Bbox East Long -78.7413229376645
Bbox North Lat 36.0335925913746
Bbox South Lat 36.0197668886381
Bbox West Long -78.7583432053079
Collection Package Id 949b7c71-6913-45f1-85b9-2a4a3dd6e2bc
Coupled Resource
Frequency Of Update asNeeded
Graphic Preview Description Tiled High Resolution Orthoimagery Browse Image
Graphic Preview File
Graphic Preview Type JPEG
Harvest Object Id db21c1ee-d277-41a3-8765-6f6b049f426b
Harvest Source Id 1fc919e5-e870-4d57-91b8-78e14081ce52
Harvest Source Title USGS High Resolution Orthoimagery Collection - Current
Licence Although these data have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made by the USGS regarding the use of the data on any other system, nor does the act of distribution constitute any such warranty. Data may have been compiled from various outside sources. Spatial information may not meet National Map Accuracy Standards. This information may be updated without notification. The USGS shall not be liable for any activity involving these data, installation, fitness of the data for a particular purpose, its use, or analyses results.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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