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Tree crown size and surface area measurement technology with electronic theodolite as tool

An electronic theodolite and canopy volume technology, applied in the field of forest measurement, can solve the problems of poor accuracy, long data acquisition cycle, low efficiency, etc., to achieve accurate measurement, reduce the intensity of measurement operations, and expand business areas.

Inactive Publication Date: 2013-05-22
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

[0004] In order to overcome the disadvantages of long data acquisition cycle, low efficiency and poor precision of traditional methods, improve efficiency and precision, and realize accurate measurement of tree crown volume and tree crown surface area, the present invention provides a tree crown volume and surface area measurement method based on electronic theodolite as a tool. The measurement method is characterized in that: the electronic theodolite is used as a tool to measure the peripheral feature points of the canopy and record and store, the canopy curve regression model is fitted by the computer, and the canopy volume and surface area are calculated by the mathematical model

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  • Tree crown size and surface area measurement technology with electronic theodolite as tool
  • Tree crown size and surface area measurement technology with electronic theodolite as tool

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Embodiment Construction

[0014] The measurement method of tree crown volume and surface area based on electronic theodolite as a tool is different from existing methods, specifically:

[0015] 1. The method of acquiring feature points on the periphery of the canopy is as follows: place an electronic theodolite at A1 in the forest stand, and first measure the diameter at breast height D at 1.3m 1.3 , horizontal angle β 1.3 , zenith distance VA 0 And record and store, and then measure clockwise from the first live branch on the left side of the tree crown to the end of the first live branch on the right side of the tree crown, and measure the observable peripheral feature points of the tree crown from point A1, and record and store the horizontal angle β of this point 1 , zenith distance VA 1 At this time, the angle A is 90°; after the observation of point A1, rotate clockwise at an angle of 45° with the observation tree as the center to find point A2 and continue to observe according to the method at...

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Abstract

The invention provides a tree crown size and surface area measurement technology with an electronic theodolite as a tool. The technology is characterized in that peripheral feature points of a tree crown are measured by the electronic theodolite as a tool, data is stored in a memory card of the electronic theodolite, and a tree crown curve regression model is established by the peripheral feature points of the tree crown so as to measure the tree crown size and surface area. The technology can greatly improve the calculation accuracy of the tree crown size and surface area, and overcomes the defects of low accuracy of an existing simple tree crown size and surface area measurement method, and complicated process of an existing tree crown size and surface area measurement method with high accuracy.

Description

1. Technical field [0001] The invention relates to a forest measurement method using an electronic theodolite as a tool, in particular to the measurement of tree crown volume and surface area using the electronic theodolite as a tool. 2. Technical background [0002] Traditional forest measurement techniques are backward, based on manual operations such as angle gauge measurement, felled wood analysis, and aerial photo interpretation. The cycle is long, the efficiency is low, and the accuracy is poor, which is far from being suitable for the monitoring of forest resources and ecological environment. need. Domestic forest monitoring is limited to the macroscopic and extensive stage with remote sensing and conventional ground survey as the main technology. The precise measurement of certain indicators, such as the theory, technology, and instrumentation of forest stand data acquisition such as canopy volume and surface area, are far from being resolved to a satisfactory level...

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Application Information

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IPC IPC(8): G01C1/00G01C3/00G01C5/00G01B21/28G01B21/00
Inventor 冯仲科郑君孙梦营高超
Owner BEIJING FORESTRY UNIVERSITY
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