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Validation of Mobile Laser Scanning for Understory Tree Characterization in Urban Forest




TekijätLin, Yi; Holopainen, Markus; Kankare, Ville; Hyyppä, Juha

KustantajaIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

KustannuspaikkaPISCATAWAY

Julkaisuvuosi2014

JournalIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing

Tietokannassa oleva lehden nimiIEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING

Lehden akronyymiIEEE J-STARS

Vuosikerta7

Numero7

Aloitussivu3167

Lopetussivu3173

Sivujen määrä7

ISSN1939-1404

eISSN2151-1535

DOIhttps://doi.org/10.1109/JSTARS.2013.2295821(external)


Tiivistelmä
This study was dedicated to validating mobile laser scanning (MLS) for understory tree characterization, which now is still an open issue of interest in the fields of forest inventory and remote sensing. The program of validation was divided into three steps aiming at its three premise questions, respectively: 1) Can MLS record echoes with precise coordinates in the scenario of forest overstory shading satellite wireless positioning signals? 2) Can MLS samplings subject to spatial distribution inconsistency show the basic structures of understory trees? and 3) Can MLS data, further, present the local details of understory tree structures? The examinations were carried out based on the related typical feature variables, i.e., 1) overstory tree stem positioning accuracy as a substitute and 2) understory tree height and crown width and the newly proposed measure of object detail characterization, i.e., 3) primary nearest point distance (PNPD). The results proved to be positive. Overall, although the discussions suggested that MLS has its shortages, e. g., its cover still restricted by tree obscuration, this endeavor has primarily validated MLS for understory tree characterization in urban forest.



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