Design and Development of Analysis Tools of Uniform Angle Index

DOI

10.2991/ssemse-15.2015.192How to use a DOI?

Keywords

Structure-based forest management; Uniform angle index; Excel VBA

Abstract

Analysis Tools of Uniform Angle Index is of great importance to structure-based forest management, however, few convenient tools were developed for practical use. In order to facilitate calculating Uniform Angle Index of each tree and the mean value of uniform angle index of stand in forest, a tool was developed. Firstly, the distances from four closest neighboring trees to reference tree were separately computed with the formula of the distance. Secondly, four angles between the lines passing through the reference tree and other trees and x-axis were counted with the function Atan2 ( ) and the standard angles were determined in line with subtraction of the angles ( ). Thirdly, uniform angle index of each tree and the mean value of uniform angle index of stand in forest were computed. Testing results show that the tool can precisely calculate uniform angle index.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - H.Y. Zhao
AU  - J. Zhang
AU  - M.X. Zhang
AU  - H.B. Zheng
PY  - 2015/11
DA  - 2015/11
TI  - Design and Development of Analysis Tools of Uniform Angle Index
BT  - Proceedings of the 2015 International Conference on Social Science, Education Management and Sports Education
PB  - Atlantis Press
SP  - 747
EP  - 751
SN  - 2352-5398
UR  - https://doi.org/10.2991/ssemse-15.2015.192
DO  - 10.2991/ssemse-15.2015.192
ID  - Zhao2015/11
ER  -