Method for drawing 3D tree measurement angle gauge through smart phone

Abstract

The invention discloses a method for drawing a 3D tree measurement angle gauge through a smart phone. The method is characterized by comprising the steps that the smart phone serves as a tool, and comparison is conducted between scales in matched mobile phone software and the included angle formed between counting trees in a forest sample plot; the counting trees in the forest sample plot are selected, and counting is conducted in sequence in the mode that in the clockwise direction, 0.5 is recorded when the scales and the trees are in tangency, zero is recorded when the scales and the trees are separated, and one is recorded when the scales and the trees are in intercrossing; finally, the product of the cross sections of tree species per hectare in the forest resource investigation process is measured according to the counting trees. The photographing function of the smart phone is utilized, two corresponding reticules are calculated through the matched software according to the angle between the counting trees, and are compared with the cross section areas of trunks of the counting trees, and therefore a conventional angle gauge is replaced, and the method is easy and more accurate and convenient to use.

Description

1. Technical field [0001] The invention relates to a method for measuring forest structure parameters, in particular to a method for using a smart phone to describe a 3D tree measuring angle gauge. 2. Technical Background [0002] The study of forest structure plays a pivotal role in the study of forest function, and the determination of forest structure parameters is crucial to the study of forest structure. It is a scientific description of the current situation of forest structure parameters and an objective basis for quantitative research on forest structure. The research on the status quo of the structure, the deduction of historical replacement, and the prediction of the future development play a vital role. [0003] The traditional method of measuring forest structure parameters is field survey, which is heavy in workload, high in cost and limited in accuracy. In recent years, remote sensing images have been used for inversion and extraction, but the extraction accur...

AI Technical Summary

Problems solved by technology

[0005] In order to improve the defects of heavy workload, poor precision, and bulky equipment in the traditional forest structure parameter determination method, the purpose of the present invention is to provide a method for 3D tree angle measurement by smartphone

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