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A method for measuring tree height and volume with a total station instrument under the condition of tree canopy occlusion

A total station and tree canopy technology, which is applied in the field of total station measurement of tree height and volume under the condition of tree canopy occlusion, can solve the problems of high point of view and shape point measurement, inability to accurately measure tree height, and large actual errors. , to achieve the effect of reducing the intensity of measurement work, simple measurement, simple calculation and

Active Publication Date: 2017-02-08
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

Although the above methods are simple and easy to implement, but the measurement positions of the viewpoint and shape point are relatively high, the forest area usually has poor visibility, difficult to observe, and the actual error is relatively large
Therefore, the above methods have obvious disadvantages under the observation conditions that the canopy blocks more trunks.
[0005] In addition, in the actual forest resource survey, there are often cases where the tree crown is blocked, which makes it impossible to accurately measure the tree height

Method used

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  • A method for measuring tree height and volume with a total station instrument under the condition of tree canopy occlusion

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Embodiment Construction

[0017] Firstly, the trees whose canopy is blocked are taken as the research object, and the total station is used as the measuring tool, aiming the total station at the root of the trunk and measuring the ground diameter d 0 , then aim at the trunk at 1.3m and measure the DBH d 1.3 , aim at the highest point that can be seen at the shaded part of the tree crown and measure the trunk diameter d m and the height h of the ground, aim at any position between the 1.3m of the trunk and the highest observable point and measure the diameter d of the trunk m and the distance h from the ground m , where d 0 , d 1.3 , d n and d m Units are centimeters, h and h m The unit is meter. Let H 1 with H 2 Both are the actual heights of the trees whose canopy is blocked, using the digital model① and digital model② Solve H 1 with H 2 , and then use the digital model ③H=(H 1 +H 2 ) / 2 to obtain H is the true height of the tree; use digital model ④V=V 1.3 +V m +V h +V 树梢 , where ...

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Abstract

The invention discloses a method for measuring the height of a tree and the volume of wood by means of a total station under the condition that the crown is covered. According to the method for measuring the height of the tree and the volume of wood by means of the total station under the condition that the crown is covered, the tree with the crowned covered serves as the study object, the total station serves as the measuring tool, the diameter d0 of the root portion of the trunk, the diameter d1.3 at breast height, 1.3m away from the ground, of the trunk, the trunk diameter dn of the highest position, within the vision reachable range, of the covered part of the crown, the distance h between the highest observable position and the ground, the trunk diameter dm of any position between the position, 1.3m away from the ground, of the trunk and the highest observable position, and the distance hm between the any position and the ground are measured in sequence, then the height of the tree and the volume of wood are measured and calculated accurately, field measurement processes are simplified, measurement intensity is relieved, and meanwhile the difficulty that the height of the tree and the volume of wood can not be measured under the condition that the crown is covered is overcome.

Description

[0001] 1. Technical field [0002] The invention relates to a method for measuring tree height and volume with a total station under the condition of canopy occlusion, in particular to measuring the diameter at different heights of the trunk and the distance from the ground by using the total station, and then obtaining the tree height and volume of the tree. [0003] 2. Technical background [0004] With the development of modern measurement technology, more and more attention has been paid to precision forestry. How to measure a small amount of data through simple methods and accurately calculate the height and volume of a single standing tree has attracted widespread attention from many scholars in recent years. discuss. Especially in forest resources investigation, the determination of the height of standing trees is very important, and it also directly affects the accuracy of the volume of standing trees of a single tree. In 1899, Schiffer proposed the breast height shape...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/02G01B21/00
Inventor 冯仲科闫飞赵芳高原
Owner BEIJING FORESTRY UNIVERSITY
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