How NCDOT Staff Request Mapping Guidance for NCDOT staff to request and obtain Existing Statewide Geospatial Data, Aerial Photography Missions, Preconstruction Mapping, and Construction Earthwork Quantities.

How NCDOT Staff Request Mapping
This hub provides guidance for NCDOT Project Managers, Resident Engineers, and other NCDOT staff to request and obtain the following:
Best Available Data (1PH1)
Aerial Mapping (1PH2)
Construction Earthwork Quantity Determination

Best Available Data (1PH1)

Upon request, the Photogrammetry Unit will obtain, analyze, and provide best available orthoimagery, elevation data, and county property data for project area. If applicable, the Photogrammetry Unit can provide more current data by flying the project area at high attitude and delivering either an Orthophoto with elevation data or topographic mapping with elevation data and orthophoto at 100-foot scale or 200-foot scale. For more information on these products, how to self-service, and/or request this data see below.

Table 1. Best Available Data Types and How to Access

TYPE OF DATA	DATA TYPE	*SELF-SERVICE	REQUEST
Orthoimagery	Loaded NC One Map WMS into software	x	x
Orthoimagery	Loaded E911 Tiles into software	x	x
Orthoimagery	Request custom set of Tiles or County Mosaic		x
Elevation Data	Obtain Bare Earth or DEM Data	x	x
Elevation Data	Obtain Bare Earth or DEM Data (custom)		x
County GIS Property Data	Obtain County Property data		x
High Altitude Mapping	Compile Elevation data and create Orthophoto		x

*Note: Some Self-Service tools may require an NCDOT login.

*Note: Contact us at Photogrammetry@ncdot.gov for additional training on self-service tools which includes in person training at either the Century Center computer lab or your office.

Click the links below for Self-Service Tools and Requests
Self-Service Tools	To make a request contact us at: Photogrammetry@ncdot.gov

For more information on the following products click the links below

Orthoimagery- NC Statewide Orthoimagery

Elevation Data – Statewide QL2 LiDAR

County Property Data - NC Statewide County GIS Property Data

Aerial Mapping (1PH2)

Upon request, the Photogrammetry Unit will obtain controlled aerial photography that covers the supplied project limits using a large format metric frame camera at specific flying heights to produce mapping at the needed accuracy for the applicable planning or design phase. The Photogrammetry Unit will either contract the project to a PEF or use in-house staff to perform aerotriangulation using ground survey control provided by the L&S Unit and airborne GNSS-IMU control, compile planimetric and digital terrain mapping data covering the supplied project limits, and create a digital mosaic of the imagery.

Table 2. Pre-Construction Aerial Mapping Products

TYPE OF DATA	DELIVERABLE FILES
Shell Plan Sheet Mapping	Shell Plan Sheet Mapping (SPS) File Digital Terrain Model (DTP) File Triangular Irregular Network (TNP) File Airborne Survey Report 20:1 MrSID Digital Mosaic with World File County GIS Property Data (if requested)
Preliminary Plan Sheet Mapping	Shell Plan Sheet Mapping (SPS) File Digital Terrain Model (DTP) File Triangular Irregular Network (TNP) File Airborne Survey Report 20:1 MrSID Digital Mosaic with World File County GIS Property Data (if requested)

For more information on the Aerial Mapping Process and how to request a Photo Mission see below
Aerial Mapping Flow Chart	How to Request a Photo Mission

Construction Earthwork Quantity Determination

The Photogrammetry Unit supports NCDOT construction projects by providing earthwork pay quantities upon request from NCDOT Resident Engineer’s Offices. This type of project includes multiple missions, each flown at a different stage during the construction process, to quantify how much earthwork has been moved. There is two Aerial System options but most project locations benefit from the traditional Manned Aerial System (Manual from Don). New location projects, borrow pits, stockpiles, or construction projects in low travel regions are good candidates to consider for Unmanned (drone) aerial photography missions for earthwork quantity determination due to FAA drone operation restrictions. The Photogrammetry Unit will help you to select the best aerial system for your project.

Table 2. Construction Earthwork Quantity Determination

AERIAL SYSTEM	DELIVERABLE FILES
Manned	Earthwork Quantity Digital Terrain Model (DTP) File Ortho Mosaic with World File Airborne Survey Report
Unmanned	Earthwork Quantity Digital Terrain Model (DTP) File 20:1 MrSID Digital Mosaic with World File Airborne Survey Report

For more information on Unmanned Aerial Systems and the Construction Earthwork Quantity Determination Process See Below
Aerial Surveying with Drones	Earthwork Quantity Determination (insert link to Earthwork Determination Information Document)

How NCDOT Staff Request Mapping Guidance for NCDOT staff to request and obtain Existing Statewide Geospatial Data, Aerial Photography Missions, Preconstruction Mapping, and Construction Earthwork Quantities.