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Forest calculating and measuring method for observing sample plot composed of five trees

A plot and forest technology, applied in the field of forest structure parameters and plot measurement, can solve the problems of poor precision, heavy workload, and heavy equipment

Inactive Publication Date: 2015-04-22
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to improve the defects of large workload, poor precision, and bulky instruments and equipment in the traditional method for measuring forest structure parameters, the purpose of this invention is to provide a method for measuring forest structure parameters in a sample plot composed of 5 trees

Method used

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  • Forest calculating and measuring method for observing sample plot composed of five trees
  • Forest calculating and measuring method for observing sample plot composed of five trees
  • Forest calculating and measuring method for observing sample plot composed of five trees

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Embodiment Construction

[0014] A forest measurement method that observes a sample plot composed of five trees differs from the traditional method in that:

[0015] ① Select a suitable sample tree as the central tree, and record it as No. 0 tree. The selection of No. 0 tree should avoid the edge of the forest as much as possible. Rotate clockwise to mark, respectively No. 2, 3, and No. 4; ② On the extension line of the connection between No. 0 tree and No. Position i' (i=1, 2, 3, 4), install a compass, measure the magnetic azimuth T of this point 0i , using the digital model β i ( i + 1 ) = T 0 ( i ...

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Abstract

The invention relates to a forest calculating and measuring method for observing a sample plot composed of fiver trees. A compass and a tape serve as tools, a polygonal sample plot composed of the five trees, including one tree in the center and four trees, in the surrounding is selected, the magnetic azimuth of each tree is measured, the uniform angle index, the mingling degree, the size ratio, the uniformity, the layered ratio, the volume of wood and the average height of the sample plot are calculated via mathematical models, and the characteristic parameters of the forest are rapidly estimated. The used tools are simple, and the efficiency and precision in calculating and measuring the structural parameters and the sample plot of the forest are improved.

Description

1. Technical field [0001] The present invention relates to a method for measuring forest structure parameters and sample plots, in particular to measuring forest structure parameters and sample plots using five trees. 2. Technical Background [0002] The structure of the forest plays a decisive role in the function of the forest, so it is of great significance to study the structure of the forest. The forest structure parameter is an important parameter for the quantitative description of the forest structure, and plays a vital role in understanding the current situation of the forest structure and managing the forest in a structured manner. The traditional method of measuring forest structure parameters is field survey, which is heavy in workload, high in cost and limited in accuracy. In recent years, remote sensing images have been used for inversion and extraction, but the extraction accuracy of low-resolution images is low, and the impact of high resolution and the inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/00G01B21/10G01B21/28
CPCG01D21/02
Inventor 冯仲科高祥
Owner BEIJING FORESTRY UNIVERSITY
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