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Assessing the Accuracy of Tree Diameter Measurements Collected at a Distance

Steven A. Weaver ; University of Georgia, Warnell School of Forestry and Natural Resources 180 E Green Street USA – GA 30602 Athens, USA
Zennure Ucar ; University of Georgia, Warnell School of Forestry and Natural Resources 180 E Green Street USA – GA 30602 Athens, USA
Pete Bettinger ; University of Georgia, Warnell School of Forestry and Natural Resources 180 E Green Street USA – GA 30602 Athens, USA
Krista Merry ; University of Georgia, Warnell School of Forestry and Natural Resources 180 E Green Street USA – GA 30602 Athens, USA
Krisha Faw ; University of Georgia, Warnell School of Forestry and Natural Resources 180 E Green Street USA – GA 30602 Athens, USA
Chris J. Cieszewski ; University of Georgia, Warnell School of Forestry and Natural Resources 180 E Green Street USA – GA 30602 Athens, USA


Puni tekst: engleski pdf 1.524 Kb

str. 73-83

preuzimanja: 1.815

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Sažetak

The ability to measure trees remotely or at a distance may be of value to forest inventory processes. Within three forest types (young coniferous, old coniferous, and deciduous), we compared laser caliper measurements collected at distances up to 12 m from each tree, to direct contact caliper measurements. Bitterlich sector-fork measurements and diameter tape measurements were also collected for reference purposes. We used non-parametric tests to evaluate three of our four hypotheses that suggest there are no significant differences between direct and remote diameter measurements, between caliper measurements and sector-fork measurements, and between diameter measurement errors across forest types. In general, most of the differences in diameters were small (≤0.8 cm) and were observed within the 0–6 m measurement distance from each tree. These results suggest that forest characteristics and measurement distance may play a role in remote diameter measurement accuracy. We also performed a correlation analysis between light conditions and remote measurements. The correlation analysis suggested light conditions were not significantly correlated to diameter measurement accuracy.

Ključne riječi

dendrometer; precision forestry; Bitterlich sector-fork; Haglöf Gator Eyes; laser caliper

Hrčak ID:

136130

URI

https://hrcak.srce.hr/136130

Datum izdavanja:

24.2.2015.

Posjeta: 2.357 *