Lidar (Light Detection And Ranging)
- What is it
- Same technology as RADAR but because it operates in shorter wavelengths, can return greater detail.
- Operated from ground or air based scanners.
for example http://www.surfacegeology.earth.utah.edu/research/Jewell_digital_mapping.htm
- 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 - 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
- Applications of Lidar
- Puget Sound consortium (http://pugetsoundlidar.ess.washington.edu/uses.htm) Compare the fault maps to this google maps location.
- North Carolina Statewide Lidar (coastal change, floodplain maps)
- mapping sinkholes (https://blogs.agu.org/thefield/2019/02/04/an-appalachian-karst-landscape-seen-in-lidar-hillshade/)