Estimating Plot-Level Forest Biophysical Parameters Using Small-Footprint Airborne Lidar Measurements

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" Estimating Plot-Level Forest Biophysical Parameters Using Small-Footprint Airborne Lidar Measurements "

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	149782
Doc. No	:	ET21574
Main Entry	:	Sorin C. Popescu
Title Proper	:	Estimating Plot-Level Forest Biophysical Parameters Using Small-Footprint Airborne Lidar Measurements
Note	:	This document is digital این مدرک بصورت الکترونیکی می باشد
Abstract	:	The main study objective was to develop robust processing and analysis techniquesto facilitate the use of small-footprint lidar data for estimating forest biophysicalparameters measuring individual trees identifiable on the three-dimensional lidar surface.This study derived the digital terrain model from lidar data using an iterative slope-basedalgorithm and developed processing methods for directly measuring tree height, crowndiameter, and stand density. The lidar system used for this study recorded up to fourreturns per pulse, with an average footprint of 0.65 m and an average distance betweenlaser shots of 0.7 m. The lidar data set was acquired over deciduous, coniferous, andmixed stands of varying age classes and settings typical of the southeastern United States(37 25' N, 78 41' W). Lidar processing techniques for identifying and measuringindividual trees included data fusion with multispectral optical data and local filteringwith both square and circular windows of variable size. The window size was based oncanopy height and forest type. The crown diameter was calculated as the average of twotested for theQ1 PC1 bus cardBoth these projects mere sofixare des elopment efforts tonards contributing to dlfferentaspects of Roboucs and lZ1echatronics projects m the Controls and Roboucs Group..
Subject	:	Electericl tess
	:	برق
electronic file name	:	TL44748.pdf
Title and statement of responsibility and	:	Estimating Plot-Level Forest Biophysical Parameters Using Small-Footprint Airborne Lidar Measurements [Thesis]