LIDAR

Lidar (Light Detection And Ranging)

1. What is it
   1. Same technology as RADAR but because it operates in shorter wavelengths, can return greater detail.
   2. Operated from ground or air based scanners.
      for example http://www.surfacegeology.earth.utah.edu/research/Jewell_digital_mapping.htm
      
   3. multiple returns allow filtering of vegetation and “bare earth” based on first and last arrivals of returns.
      
      https://www.e-education.psu.edu/geog481/sites/www.e-education.psu.edu.geog481/files/Figure_8_01.jpg
   4. Creation of DEMs from LIDAR scans http://www.webpages.uidaho.edu/measurements/Research/Lidar_web_Tutorial.htmm
      last return or use a “progressive curvature” filter (https://forest.moscowfsl.wsu.edu/lidar/) (Figure)open …\Demo\lidar
2. Applications of Lidar
   1. Puget Sound consortium (http://pugetsoundlidar.ess.washington.edu/uses.htm) Compare the fault maps to this google maps location.
   2. North Carolina Statewide Lidar (coastal change, floodplain maps)
   3. mapping sinkholes (https://blogs.agu.org/thefield/2019/02/04/an-appalachian-karst-landscape-seen-in-lidar-hillshade/)