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Land and Watershed Management |
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Genetic and Silvicultural Foundations for Management
LIDAR/IFSAR — New Tools for Measuring Forest Vegetation and TerrainThe Silviculture and Forest Models (SFM) Team has been cooperating with the Precision Forestry Cooperative (PFC) located at the University of Washington to evaluate the accuracy of LIDAR (LIght Detection And Ranging) and IFSAR (interferometric synthetic aperture radar) data for terrain and vegetation structure measurements. LIDAR is a remote sensing technology that bounces laser pulses off the vegetation and ground as a data collection aircraft flies across a landscape (figure 1). The LIDAR system converts the reflected laser pulse data into a cloud of high-resolution three-dimensional coordinates (figure 2) that can then be used to measure both the ground surface and vegetation structure on a landscape (figure 3).
IFSAR is another remote sensing technology; it uses radar, rather than laser light, to measure vegetation and terrain. The team is developing LIDAR and IFSAR measurement tools to collect vegetation characteristics such as tree density, tree size, canopy cover, canopy volume, and crown bulk density over landscapes at high spatial resolution (1 m to 3 m). Our research efforts to date include:
These efforts include LIDAR data visualization to support analysis activities and help communicate the wealth of information contained in the LIDAR datasets (figure 4). For more information, contact: Steve Reutebuch or Bob McGaughey. |
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USDA Forest Service - GenSilv Team |