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Use of Lidar of Data Extraction

Use of Lidar of Data Extraction

Presented by Dan Allee, Philip Burkhart, and Lance Yarema - City of Tyler

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  1. Use of LiDAR in Data Extraction Presented by Dan Allee,

    Philip Burkhart, and Lance Yarema, City of Tyler
  2. 1) What is LiDAR? 2) How this project started? 3)

    What are the applications? 4) Closing remarks and questions Scope of the Presentation
  3. An airplane with LiDAR system sends light energy to the

    ground where pulse hits the ground then returns back to sensor. What is LiDAR?
  4. The pulses measure how long it takes for light to

    return back to the sensor. This creates the variable distance to the Earth. What is LiDAR?
  5. What is LiDAR? LiDAR does not have to use the

    direct nadir, but scans at angles. This is taken into account when calculating the elevation.
  6. For ground obstruction like tree canopies, the light pulses will

    hit the leaves with multiple returns where it eventually reaches the ground. What is LiDAR?
  7. How this project started? City of Tyler was interested in

    LiDAR but never pursued due to cost restraints.
  8. How this project started? An opportunity arose in 2014 when

    the TCEQ was conducting a dam failure study for lakes and ponds.
  9. How this project started? • City of Tyler - $50,000

    (funded by Half Cents Sales Taxes) • State of Texas - $500,000
  10. How this project started? Companies that conducted the project. •Fugro

    Geospatial, Inc. – QA/QC •Atkins North America, Inc. - flying • Williams Aerial and Mapping • McKim and Creed
  11. Closing Remarks LiDAR is a useful tool for terrain and

    surface structure visualization in addition to its initial role in modeling scenarios of hydrological events