Three-dimensional green quantity measuring method

Abstract

The invention discloses a three-dimensional green quantity measuring method which is characterized by comprising the following steps: measuring angles and side lengths by using a total station or a measuring rule matched with an electronic theodolite as tools; processing the measured angle data and side length data by the related measuring technique, and acquiring the coordinates of points to be measured on a tree crown; and finally, realizing the three-dimensional representation of the volume of the measured tree crown on a computer by a mathematical method, thereby realizing the purpose of automatically measuring the volume of tree crowns with regular shapes in forests. The invention is quick and convenient, fully utilizes the total station and the electronic theodolite which are usually used in engineering measurement, widely applies the measuring methods which are usually used in measurement to forest measurement, saves the time, reduces the workload, improves the working efficiency, and simutaneously can greatly improve the degree of automation of working by utilizing the computer.

Description

technical field [0001] The invention relates to a three-dimensional green quantity measuring method, in particular to a three-dimensional green quantity measuring technique method using a total station or a measuring ruler combined with an electronic theodolite as a tool. Background technique [0002] So far, the technical methods of three-dimensional green quantity measurement can be roughly divided into "stereo photogrammetry" and "plane quantity simulated three-dimensional quantity". The tree height or crown diameter and other information reproduction green quantity models mostly use the diameter-height equation and some empirical formulas, but the above methods still have some defects: [0003] ① At present, some raw data required for the calculation of three-dimensional green quantity must be collected and interpreted manually (such as the determination of main tree species, the measurement of tree height, crown diameter, leaf area, and interpretation of remote sensing ...

AI Technical Summary

Problems solved by technology

[0003] ① At present, some raw data required for calculating the three-dimensional green quantity must be manually collected and interpreted (such as the determination of main tree species, the measurement of tree height, crown diameter, and leaf area, and the interpretation of remote sensing images, etc.). The workload is heavy, which forms a strong contrast with the later computer simulation calculations

[0004] ②The measurement accuracy of 3D green quantity mainly depends on the reliability of simulation calculation. The accuracy of field sampling survey and the accuracy of aerial photo analysis directly affect the calculation accuracy. It can be seen from this that there is a gap between the workload and the calculation accuracy of 3D green quantity. Great correlation, that is, complicated field work can ensure the accuracy requirements of three-dimensional measurement;

[0006] Therefore, these methods have the disadvantages of heavy workload, low accuracy and difficult data update

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