Censusing and modeling the dynamics of a population of eastern hemlock (Tsuga canadensis L.) using remote sensing.

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" Censusing and modeling the dynamics of a population of eastern hemlock (Tsuga canadensis L.) using remote sensing. "

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	150104
Doc. No	:	ET21896
Main Entry	:	W. Robert Lamar
Title Proper	:	Censusing and modeling the dynamics of a population of eastern hemlock (Tsuga canadensis L.) using remote sensing.
Note	:	This document is digital این مدرک بصورت الکترونیکی می باشد
Abstract	:	A population of eastern hemlock (Tsuga canadensis L.) was censused from the groundusing traditional field methods and from the air using large scale, high-resolution, aerialimagery in the early spring of 1997,1998 and 1999. A manual crown survey map of thepopulation, prepared from aerial imagery, was compared to a traditional field census.Over 60 of the individuals measured on the ground were not detected in the aerialcensus. Tree size, crown density and crown position all played roles in determining acrownبs visibility from the air. Nearly all large, upper canopy hemlocks were visible inthe aerial census. An important minority of small, lower canopy hemlocks were alsovisible in the aerial census. An automated spatial segmentation procedure was developedto identify and measure individual population units, or blobs, within the forestpopulation. A blob was defined as a distinct portion of crown segmented from itsneighbors on the basis of size, shape, and connectivity. To ensure the comparability ofmulti-year segmentation maps, an automated blob reconciliation procedure was alsodeveloped to make certain,..tested 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	:	TL45088.pdf
Title and statement of responsibility and	:	Censusing and modeling the dynamics of a population of eastern hemlock (Tsuga canadensis L.) using remote sensing. [Thesis]