Graduate Project

 

Assessment of LIDAR for identification of present and past forest roads Public Deposited

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https://ir.library.oregonstate.edu/concern/graduate_projects/5m60qs614

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  • In this study, LIDAR, light detection and ranging, was examined as to its ability to depict the existence of forest roads and 'legacy' roads. LIDAR is most often used to 'see' though the trees or vegetation to get an accurate representation of the terrain. As opposed to trying to remove the vegetation for description of the landscape, the detection of maintained roads was accomplished successfully by examining the breaks in the forest canopy. These roads can then be delineated and used to update an existing database. This process was also semi-automated in a GIS, creating linear features in a coverage based on the break in the slope of the canopy. The resulting coverage was much more accurate than the existing database. Examination of the TIN created from the LIDAR points allowed for a manual detection of 'legacy' roads in areas of very high shot density. Mass wasting and landslides are also detectable from the LIDAR. The accuracy of the identification of 'legacy' roads and landslides will greatly increase as the scanning technology improves and greater shot density becomes available at lower costs. Keywords: LIDAR, Remote Sensing, Forest Practices, Canopy Assessment, Road Networks, Forest Engineering
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