Electronic theodolite measurement system and tree survey method therefor

Abstract

This invention discloses an electrical altometer measurement system and its automatic tree measurement method, which is integrated by electrical altometer, PDA and database. The tree measurement method is the following: the electrical altometer measurement process is combined with computer technique; under the aid of electrical altometer and angle gage tree measurement software, it realizes the measurement, judgment, computer automation of the tree measurement process to simultaneously accomplish the indoor and outdoor process. It specially adopts potential computing method combined with current method to measure the tree growth storage more reasonable.

Description

technical field [0001] The present invention relates to a method for sampling survey of forest resources, in particular to an electronic theodolite automatic tree measuring method for unequal sampling survey of forest resources, which realizes the measurement, judgment and calculation of the tree measuring process through the angle gauge tree measuring software. , so that both the field and the industry can be completed simultaneously, which can greatly improve work efficiency and reduce labor intensity. In particular, the potential count method, combined with the conventional method, can more reasonably measure the growth of stand volume. technical background [0002] Over the past 50 years, the theory and technology of the angle gauge have been continuously developed and perfected, but its main function is still to measure the chest height basal area of ​​the stand. Inspired by this theory, in 1955, Hirata Tanao (Japan) proposed a fixed-angle altimetry method to measure th...

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Problems solved by technology

Their theory is undoubtedly correct, but the canopy overlaps in the forest, it is difficult to see through, and the average height of the stand cannot be directly measured, so it has not been popularized and applied in practice; Compared with using instruments, it is obviously disturbed by human factors. Operators must be strict and operate carefully, but this inevitably has a large error, and the accuracy cannot be guaranteed; secondly, using angle gauges to measure trees cannot Real-time processing cannot achieve the purpose of real-time and dynamic monitoring of the growth of forest stands; at the same time, due to the particularity of the principle of measuring trees with angle gauges (PPS sampling), the growth of incoming trees and the growth of retained trees are measured in the angle gauge. These changes are all jumping, and this jumping change does not completely conform to the actual growth process of the stand, and the measurement of the stand volume is much more complicated than the basal area, and the collection and processing of a large amount of complicated information cannot be done manually. Solved, yet to be automated

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