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Method for measuring mean height of vegetation

An averaging and vegetation technology, applied in measurement devices, instruments, etc., can solve the problems of low efficiency, long data acquisition cycle, poor accuracy, etc., to expand the business field, the technical method is simple and clear, and reduce the work intensity.

Inactive Publication Date: 2014-01-01
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

[0004] In order to overcome the disadvantages of long data acquisition period, low efficiency and poor precision of traditional methods, improve efficiency and precision, and realize accurate measurement of vegetation average height, the present invention provides a tree measuring gun (handheld total station) as a tool The method for measuring the average height of a vegetation stand is characterized by: using a tree measuring gun as a tool, designing a new critical value, comparing and counting the two inclination angles of the target tree with the critical value, and calculating the forest by accumulating counting values. high average score

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  • Method for measuring mean height of vegetation
  • Method for measuring mean height of vegetation
  • Method for measuring mean height of vegetation

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Embodiment Construction

[0015] The method of measuring the average height of vegetation based on the tree gun is different from the existing methods, in particular:

[0016] 1) Select a suitable position to place the tree measuring gun, select any vegetation (take arbor as an example) to start the measurement, and calibrate the h height of the target tree, usually h = 1.3m, or according to the actual situation.

[0017] 2) Measure the inclination angle β when aiming at the treetop and h of the target tree respectively by using a tree measuring gun 1 , β 2 , take the angle formed by the two sight lines β=β 1 -β 2 , and compare the difference with the critical value of 45°. by formula Count, accumulate the total count after one round of winding and record it as n.

[0018] 3) By formula H ‾ ′ = 100 K πn and formula H ‾ ...

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Abstract

The invention relates to a method for measuring the mean height of vegetation. According to the method for measuring the mean height of the vegetation, a tree measurement gun (a handheld total station instrument) is used as a tool, a new critical value is designed, the included angle between a treetop of a target tree and one fixed high position is measured and compared with the critical value, counting is conducted according to a rule, and the forest stand mean height is calculated according to a total number obtained through accumulation of results of the measurement conducted for a circle around the tree. The calculation accuracy of the mean height of the vegetation is greatly improved and the defects that an existing forest stand mean height measurement method is simple, low in accuracy and long in measurement period are overcome.

Description

1. Technical field [0001] The invention relates to a method for determining the average height of vegetation. 2. Technical background [0002] The traditional measurement technology for measuring the average height of vegetation is backward, based on manual operations such as angle gauge measurement, compass combined with tape measure, long observation time, low operation efficiency, and poor results accuracy, which is far from suitable for forest resources and forest resources. The needs of ecological environment informatization survey. Domestic surveys on the average height of stands are limited to the macroscopic and extensive stages with remote sensing and conventional ground angle surveys as the main techniques. The accurate and rapid measurement of the average height of stands has many drawbacks, and the theoretical, technical and instrumental problems of data acquisition are far from being solved to a satisfactory level. [0003] In the actual work of forest investi...

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Application Information

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IPC IPC(8): G01B21/02
Inventor 冯仲科高祥
Owner BEIJING FORESTRY UNIVERSITY
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