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Proceedings Paper

Control methods for merging ALSM and ground-based laser point clouds acquired under forest canopies
Author(s): Kenneth Clint Slatton; Matt Coleman; William E. Carter; Ramesh L. Shrestha; Michael Sartori
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Paper Abstract

Merging of point data acquired from ground-based and airborne scanning laser rangers has been demonstrated for cases in which a common set of targets can be readily located in both data sets. However, direct merging of point data was not generally possible if the two data sets did not share common targets. This is often the case for ranging measurements acquired in forest canopies, where airborne systems image the canopy crowns well, but receive a relatively sparse set of points from the ground and understory. Conversely, ground-based scans of the understory do not generally sample the upper canopy. An experiment was conducted to establish a viable procedure for acquiring and georeferencing laser ranging data underneath a forest canopy. Once georeferenced, the ground-based data points can be merged with airborne points even in cases where no natural targets are common to both data sets. Two ground-based laser scans are merged and georeferenced with a final absolute error in the target locations of less than 10cm. This is comparable to the accuracy of the georeferenced airborne data. Thus, merging of the georeferenced ground-based and airborne data should be feasible. The motivation for this investigation is to facilitate a thorough characterization of airborne laser ranging phenomenology over forested terrain as a function of vertical location in the canopy.

Paper Details

Date Published: 22 December 2004
PDF: 8 pages
Proc. SPIE 5661, Remote Sensing Applications of the Global Positioning System, (22 December 2004); doi: 10.1117/12.582445
Show Author Affiliations
Kenneth Clint Slatton, Univ. of Florida (United States)
Matt Coleman, Univ. of Florida (United States)
William E. Carter, Univ. of Florida (United States)
Ramesh L. Shrestha, Univ. of Florida (United States)
Michael Sartori, Univ. of Florida (United States)

Published in SPIE Proceedings Vol. 5661:
Remote Sensing Applications of the Global Positioning System
Michael Bevis; Yoshinori Shoji; Steven Businger, Editor(s)

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