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A Forest Measurement Method Based on Electronic Theodolite and Total Station

An electronic theodolite and total station technology, which is applied in the measurement of forest accumulation, average density and diameter order distribution, and average high field, can solve the problems of low efficiency, long data acquisition period, poor accuracy, etc. The degree of automation and the effect of improving work efficiency

Active Publication Date: 2011-11-30
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, shorten the period, and realize accurate measurement of forest stands, the present invention provides A kind of forest measurement method based on electronic theodolite and total station is characterized in that: a sampling point 1 is designed, and a tree is chosen the nearest tree from the measuring point, which is called the center tree; then take the center tree as the center, The four directions of east, south, west, and north form four quadrants. For each quadrant, the two trees closest to the central tree are selected as observation trees. One of quadrants, so there are 9 central trees and observation trees in total

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  • A Forest Measurement Method Based on Electronic Theodolite and Total Station
  • A Forest Measurement Method Based on Electronic Theodolite and Total Station
  • A Forest Measurement Method Based on Electronic Theodolite and Total Station

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Embodiment Construction

[0011] The forest measurement method based on electronic theodolite and total station is different from the existing method, specifically in:

[0012] Sampling design a measuring point A, and select a tree 1 closest to the measuring point, which is called the central tree; The quadrant selects the two trees closest to the central tree as the observation tree. If a certain nearest tree happens to be on the coordinate axis, this tree is counted as the quadrant with the smaller counterclockwise angle between the two adjacent quadrants. In this way, the central A total of 9 trees and observation trees (attached figure 1 ). Observe the coordinates of each tree on measuring point A (x i ,y i ), DBH D i and tree height H i (i=1, 2, L9). Using digital model① V = 1 4 π f θ Σ i = 1 n ...

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Abstract

The invention discloses a method for measuring a forest based on an electronic theodolite and a total station. The method comprises the following steps that: the electronic theodolite and the total station which serve as tools acquire all factor data of forest stands; a personal digital assistant (PDA) stores and processes data; and the electronic theodolite and the total station directly observe the coordinates, diameters at breast height and heights of trees from sampling measurement points, so that the forest accumulation of the forest stands, the average height and average density of the forest stands and diameter order distribution can be accurately and quickly acquired in real time. Compared with the conventional method, the method has the advantages that: time is saved, working load is reduced, and working efficiency is improved; and the data is stored and processed by programming of the PDA, and the degree of automation of operation can be greatly improved.

Description

1. Technical field [0001] The invention relates to a forest measurement method based on an electronic theodolite and a total station, in particular to a measurement of forest accumulation, average height, average density and diameter-order distribution using an electronic theodolite or a total station. 2. Technical background [0002] The traditional forest monitoring technology is backward. It is based on manual operations such as mechanical pointer compass positioning measurement and aerial photo interpretation. The cycle is long, the efficiency is low, and the accuracy is poor. It is far from meeting the monitoring needs of forest resources and ecological environment. Domestic forest monitoring is limited to the macroscopic and extensive stage with remote sensing and conventional ground survey as the main technology. Accurate measurement of certain indicators, such as forest volume, average height, average density, and diameter-order distribution of stand data, has not ye...

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Application Information

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IPC IPC(8): G01B21/28G01B21/04G01B21/10G01N9/00A01G23/00
Inventor 冯仲科邓欧刘德庆姚山
Owner BEIJING FORESTRY UNIVERSITY
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