Evaluating the Accuracy of Remote Dendrometers in Tree Diameter Measurements at Breast Height

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dc.contributor.authorUçar, Zennure
dc.contributor.authorDeğermenci, Ahmet Salih
dc.contributor.authorZengin, Hayati
dc.contributor.authorBettinger, Pete
dc.date.accessioned2023-07-26T11:54:11Z
dc.date.available2023-07-26T11:54:11Z
dc.date.issued2022
dc.departmentDÜ, Orman Fakültesi, Orman Mühendisliği Bölümüen_US
dc.description.abstractAn accurate tree diameter (DBH) measurement is a significant component of forest inventory. This study assessed the reliability of remote dendrometers to measure tree DBH. We compared direct caliper measurements (reference measurements) to the remote measurements collected from a laser caliper and a smartphone at 0.5 m, 1 m, and 1.5 m distances from each tree within three forest types (pine, oak, and poplar forests). In general, all remote dendrometers underestimated the mean diameter compared to direct caliper measurements, regardless of forest types and distances. We observed that the mean deviation of direct caliper measurement and smartphone measurement at 1.5 m within a pine forest and oak forest were the lowest (0.3 cm and 0.36 cm, respectively). The deviations between direct caliper measurements and smartphone measurements at a 0.5 m distance, across forest types, were noticeably larger compared to others. An ANOVA test was used to determine whether significant deviations existed between caliper measurements and remote measurements at a specific distance, and among three different forest types. We rejected the null hypothesis, which suggested that there were no statistically significant differences (p<0.05) between tree DBH measurements obtained from the direct caliper measurements and indirect measurements (smartphone and laser caliper) captured at a distance. Then, a post-hoc test was performed to examine which set of estimated deviations was different from the reference data. The results suggested that indirect tree DBH measurements using the smartphone app at 1 m and 1.5 m in certain forest types (pine and oak) were not significantly different from direct tree DBH measurements. Also, our test results mostly indicated no significant difference within each forest, except for measurements using the smartphone app at 0.5 m across all forest types when the smartphone measurements were compared to laser caliper measurements. Although forest characteristics and measurement distance may play an important role in remote tree DBH measurement accuracy, the smartphone app may be used as a practical alternative to direct measurement in measuring the DBH of a tree, which may be a positive development for forestry due to the increased use of smartphones and the availability of a free measure app.en_US
dc.description.sponsorshipDepartment of Forest Engineering, Faculty of Forestry, Duzce Universityen_US
dc.description.sponsorshipThis work was supported by the Department of Forest Engineering, Faculty of Forestry, Duzce University. We would also like to thank our senior forestry student who helped us to collect data and all authors who contributed to the planning, analyses, and writing process of the article.en_US
dc.identifier.doi10.5552/crojfe.2022.1016
dc.identifier.endpage197en_US
dc.identifier.issn1845-5719
dc.identifier.issue1en_US
dc.identifier.scopus2-s2.0-85122150370en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage185en_US
dc.identifier.urihttps://doi.org/10.5552/crojfe.2022.1016
dc.identifier.urihttps://hdl.handle.net/20.500.12684/12756
dc.identifier.volume43en_US
dc.identifier.wosWOS:000736146500013en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorDeğermenci, Ahmet Salih
dc.institutionauthorZengin, Hayati
dc.language.isoenen_US
dc.publisherZagreb Univ, Fac Forestryen_US
dc.relation.ispartofCroatian Journal of Forest Engineeringen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.snmz$2023V1Guncelleme$en_US
dc.subjectPrecision Forestry; Laser Caliper; Smartphone; Diameter At Breast Heighten_US
dc.subjectVarianceen_US
dc.titleEvaluating the Accuracy of Remote Dendrometers in Tree Diameter Measurements at Breast Heighten_US
dc.typeArticleen_US

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