Notice of retraction
Vol. 32, No. 8(2), S&M2292

ISSN (print) 0914-4935
ISSN (online) 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
is covered by Science Citation Index Expanded (Clarivate Analytics), Scopus (Elsevier), and other databases.

Instructions to authors
English    日本語

Instructions for manuscript preparation
English    日本語

Template
English

Publisher
 MYU K.K.
 Sensors and Materials
 1-23-3-303 Sendagi,
 Bunkyo-ku, Tokyo 113-0022, Japan
 Tel: 81-3-3827-8549
 Fax: 81-3-3827-8547

MYU Research, a scientific publisher, seeks a native English-speaking proofreader with a scientific background. B.Sc. or higher degree is desirable. In-office position; work hours negotiable. Call 03-3827-8549 for further information.


MYU Research

(proofreading and recording)


MYU K.K.
(translation service)


The Art of Writing Scientific Papers

(How to write scientific papers)
(Japanese Only)

Copyright(C) MYU K.K.

Investigation of Benefit of Applying Handheld Scanner to Measure Tree Height and Diameter at Breast Height

Joon Kyu Park and Dae Yong Um

(Received February 28, 2020; Accepted June 19, 2020)

Keywords: diameter at breast height, laser scanner, felled tree, forest, handheld scanner, point cloud, measurement

Recently, several countries have established a national forest survey and monitoring system to analyze the exact amount of forest resources and identify changes in forest ecosystems. South Korea is also collecting data on basic forest statistics and conducting surveys to assess the health of forests. The most basic part of a forest survey has many subsequent effects in related work and in the work of actual measurers and information users. Therefore, accurate results are important because these results are the basis for the development of forest-related research. The diameter at breast height (DBH) is a measurement item for forest investigation, and it is the most basic data among the essential items of forest management, forest inventory, and carbon cycle modeling. DBH measurements have traditionally been made manually using calipers. However, this method can cause errors depending on the person and has a disadvantage that it is difficult to measure DBH when the shape of the tree is irregular. In existing forest research, there is a lack of research on this measurement method. As an emerging technology, 3D laser scanning has been introduced in the field of forestry, and its use is expected. In this study, a 3D laser scanner was used to measure DBH and tree height. Data on the forest studied were obtained using a handheld scanner. Software measurements were also performed on felled trees to obtain data, which were compared with measurements by calipers. The DBH measurements showed a deviation of less than 4 cm from the caliper measurements. These results indicate that DBH can be measured using a handheld scanner. Also, measuring a tree diameter at a height of 1.2 m is difficult in the field; thus, using a handheld scanner will improve work efficiency. The tree heights measured using a handheld scanner were within 10 cm of the reference values. Although the reference values were measured using a total station for accurate measurement, an error is likely to occur when using a clinometer in the field, and tree height measurement using a handheld scanner may improve the measurement accuracy. Also, the diameters of felled trees were measured. The diameters of the felled trees measured using a scanner showed a difference of less than 4 cm from the reference values. There is a slight difference from the values measured using calipers or a tape, which may be due to the noise of the point cloud. If further research is performed to reduce noise and automate the measurement, it may be possible to use a scanner-based method to measure the diameters of felled trees.

Corresponding author: Dae Yong Um




Forthcoming Regular Issues


Forthcoming Special Issues

Special issue on Novel Materials and Sensing Technologies on Electronic and Mechanical Devices (1)
Guest editor, Teen-Hang Meen (National Formosa University), Wenbing Zhao (Cleveland State University), and Hsien-Wei Tseng (Longyan University)
Call for paper


Special Issue on New Trends in Smart Sensor Systems
Guest editor, Takahiro Hayashi (Kansai University)
Call for paper


Special Issue on Intelligent Sensing Control Analysis, Optimization and Automation
Guest editor, Cheng-Chi Wang (National Chin-Yi University of Technology)


Special Issue on International Conference on BioSensors, BioElectronics, BioMedical Devices, BioMEMS/NEMS and Applications 2019 (Bio4Apps 2019)
Guest editor, Hirofumi Nogami and Masaya Miyazaki (Kyushu University)
Conference website
Call for paper


Special Issue on Materials, Devices, Circuits, and Analytical Methods for Various Sensors (4)
Guest editor, Chien-Jung Huang (National University of Kaohsiung), Cheng-Hsing Hsu (National United University), Ja-Hao Chen (Feng Chia University), and Wei-Ling Hsu (Huaiyin Normal University)
Conference website


Special Issue on Geomatics Technologies for the Realization of Smart Cities (1) and (2)
Guest editor, He Huang and XiangLei Liu (Beijing University of Civil Engineering and Architecture)
Call for paper


Copyright(C) MYU K.K. All Rights Reserved.