slide1
Download
Skip this Video
Download Presentation
NC Flood Plain LIDAR Use at NCDOT August 4, 2004 NC LIDAR Workgroup NCSU

Loading in 2 Seconds...

play fullscreen
1 / 11

North Carolina Department of transportation Photogrammetry Unit ... - PowerPoint PPT Presentation


  • 127 Views
  • Uploaded on

North Carolina Department of Transportation. NC Flood Plain LIDAR Use at NCDOT August 4, 2004 NC LIDAR Workgroup NCSU. North Carolina Department of Transportation Experience with LIDAR Elevation Data. NCDOT Photogrammetry Unit NCDOT Hydraulics Unit NCDOT Visualization Group

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'North Carolina Department of transportation Photogrammetry Unit ...' - mayes


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

North Carolina

Department of Transportation

NC Flood Plain LIDAR

Use at NCDOT

August 4, 2004

NC LIDAR Workgroup

NCSU

slide2

North Carolina

Department of TransportationExperience with LIDAR Elevation Data

  • NCDOT Photogrammetry Unit
  • NCDOT Hydraulics Unit
  • NCDOT Visualization Group
  • NCDOT GIS Unit
  • Contact Information
slide3

North Carolina

Department of TransportationPhotogrammetry Unit

  • 2000 - 2001: USDOT funded Technology Application Project with EarthData
    • Documented accuracy and demonstrated potential for LIDAR elevation data in transportation projects
    • Initial indication of computer technology related issues
  • 2002: Utilized NC Flood Plain LIDAR for 20 projects
    • Validated accuracy and evaluated provided data for application to standard mapping products
    • Developed Implementation Plan
  • 2003: Utilized NC Flood Plain LIDAR for 30 projects
    • Continued with Implementation Plan
  • 2004: Anticipate Using NC Flood Plain LIDAR for 80 projects
    • Now providing LIDAR elevation data to other NCDOT customers
slide4

North Carolina

Department of TransportationPhotogrammetry Unit

  • Implementation Plan
    • Acquire 20 Foot Gridded LIDAR Elevation Data from NCFMP - currently have Phase I and waiting for release of Phase II
    • Implemented a Program to Host, Access, & Reformat 20 Foot Gridded Data to MicroStation DGN Format on NCDOT Photogrammetry Server for Internal Customers
    • Utilize 20 Foot Gridded LIDAR Elevation Data for Orthorectification, Planning, and Functional and Preliminary Design Mapping Products
    • Continue to Add Photogrammetric Breaklines to 20 Foot Gridded LIDAR Elevation Data to Produce DTM Data for Functional and Preliminary Design
    • Will not Utilize NCFMP LIDAR Elevation Data for Final Design DTM Data or Construction Earthwork Pay Quantity Calculations
slide5

North Carolina

Department of TransportationPhotogrammetry Unit

  • Mapping Products that Utilize NC Flood Plain LIDAR
    • Digital Mosaic - used for corridor planning and environmental document
      • LIDAR used for orthorectification
    • Orthophotography - used for corridor evaluation and selection
      • LIDAR included as part of terrain data with limited photogrammetric breaklines
      • LIDAR used for orthorectification
    • Topographic Mapping - used to establish project footprint and is often base map for Design Public Hearing
      • LIDAR included as part of terrain data with extensive photogrammetric breaklines
  • Typical Scale is 1”=200’
slide6

North Carolina

Department of TransportationHydraulics Unit

  • 2003 - 2004: Utilized NC Flood Plain LIDAR to clarify and resolve drainage and flooding disputes nearby NCDOT Projects
  • Disputes can arise during or post construction
  • Have used NC Flood Plain LIDAR for a few projects to date
  • NC Flood Plain LIDAR provided by Photogrammetry Unit
slide7

North Carolina

Department of TransportationVisualization Group

  • 2003 - 2004: Utilized NC Flood Plain LIDAR for terrain and model surface for image rendering
  • Have used NC Flood Plain LIDAR for a few projects to date
  • NC Flood Plain LIDAR proved by Photogrammetry Unit or obtained directly from NCEM
  • Sample Rendered Images from Wilmington, NC (Image and building footprints from local governments)
slide8

North Carolina

Department of TransportationVisualization Group

slide9

North Carolina

Department of TransportationVisualization Group

slide10

North Carolina

Department of TransportationGIS Unit

  • 2002 - 2004: Developed and maintaining database and program to retrieve 20 foot gridded LIDAR for use by Photogrammetry Unit (DGN file)
  • 2004: Developing a web site that provides contours or gridded LIDAR for an entire county (output available as State Plane Feet in shapefile or DGN file)
    • currently utilizes NC Flood Plain LIDAR and USGS DEM data
  • 2004: Developing program to use raw LIDAR data to determine building heights for NCDOT Visualization Group projects
slide11

North Carolina

Department of TransportationContact Information

ad