A technical method for oblique photography of UAVs in fixed plots of forests

A fixed sample plot, oblique photography technology, applied in photogrammetry/video surveying, measuring devices, instruments, etc., can solve the problem that the forest fixed sample plot has little significance, has a great influence on image clarity, and is difficult to carry out frequently. and other problems, to achieve the effect of easy 3D modeling of forests, reduction of human workload, and easy visual interpretation.
CN104634322BInactive Publication Date: 2017-09-05北京北林生态田园景观规划设计有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
北京北林生态田园景观规划设计有限公司
Publication Date
2017-09-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a forest fixed sample area unmanned plane oblique photograph technical method. According to the method, an unmanned plane oblique photographing technology is used, a geometric scheme relation among a base length B between two photograph points of an unmanned plane, a flight height H from a take-off place of the unmanned plane, an unmanned plane oblique photographing angle omega, a camera photograph field angle beta of the unmanned plane and an edge length a of a forest fixed sample area is established for three different terrains (flat ground, uphill ground and downhill ground) of the forest fixed sample area, so that an optimum flight scheme for different terrain situations can be respectively designed. On the basis of the optimum flight scheme, various parameters of the forest sample area can be measured and acquired, and finally the biomass and stand volume of the forest can be solved.
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Description

[0001] 1. Technical field

[0002] The invention relates to a data acquisition method for sample tree measurement and three-dimensional modeling in the survey of fixed forest plots, in particular to a technical method for oblique photography of unmanned aerial vehicle fixed plots in forests.

[0003] 2. Technical background

[0004] The methods used in the traditional survey of fixed forest plots are mainly to combine artificial ground regular measurements with aerial remote sensing and space satellite remote sensing to assist forest resource surveys, and the current method of using UAV aerial photography and upright photography, but the above-mentioned technologies The method has obvious shortcomings and deficiencies in actual operation practice:

[0005] ①Using ground sample plots for regular measurements requires a lot of manpower and material resources, high cost, high work intensity, and long measurement cycles, especially for sudden forest fire disasters, it is difficult ...

Claims

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