Method for rapidly and accurately determining shape and area of forest gap

Abstract

The invention discloses a method for rapidly and accurately determining the shape and area of a forest gap, which comprises the following steps: (1) determining coordinates of a forest zone to be determined; (2) controlling, by a ground processing system, according to the coordinates, an unmanned plane remote sensing system to fly to a position 200 m above the ground of the forest zone to be determined, allowing the unmanned plane remote sensing system to hover; (3) performing aerial photographing of the forest zone to be determined by the unmanned plane remote sensing system, wherein the unmanned plane remote sensing system comprises a control module (210) for receiving instructions from the ground processing system, and controlling a power module, a global positioning system module, and a shooting module based on the received data, and a shooting module for receiving instructions from the control module and performing aerial photographing based on the received instructions; (4) processing the aerial photographs, that is, processing the aerial photographs by an ERDAS software; (5) calculating the shape and area of the forest gap. The method has the advantages of rapidness, accuracy, sensitive reaction, simple structure, labor saving and time saving, and the like, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to a method for measuring the shape and area of ​​a forest gap, in particular to a method for quickly and accurately determining the shape and area of ​​a forest gap for quickly and accurately measuring the shape and area of ​​a broad-leaved Korean pine forest area. Background technique [0002] Forest gap refers to the phenomenon of creating gaps in the forest canopy. Forest gaps are of great significance to forest renewal. The growth of vegetation in the forest can be determined by the size of forest gaps. Vegetation pruning expands gaps to achieve the purpose of accelerating the rapid growth of forest vegetation. [0003] At present, the measurement of the shape and area of ​​forest gaps is mainly carried out manually, which is time-consuming and laborious, with large errors. For some mountainous areas that cannot be reached by personnel, it is difficult to measure manually. [0004] At present, there is a kind of satellite ae...

AI Technical Summary

Problems solved by technology

[0003] At present, the measurement of the shape and area of ​​forest gaps is mainly carried out manually, which is time-consuming and laborious, with large errors. For some mountainous areas that cannot be reached by personnel, it is difficult to measure manually

[0004] At present, there is a kind of satellite aerial photography technology and aerial photography aircraft. However, this technology is greatly affected by the environment. When there are clouds blocking it, it cannot complete the aerial photography task. Since the satellite is outside the atmosphere, it cannot take clear photos by aerial photography. The resolution of the satellite can be Accurate to 0.5 meters, the resolution of satellite aerial photography is low, and the aerial photography aircraft needs to build a runway, which costs a lot

[0005] At present, there are technologies and devices for the use of pan-tilts in conjunction with three-axis accelerometers and three-axis gyroscopes, such as the self-stabilizing pan-tilt based on inertial attitude sensors in patent application CN201210201385.9 and the aircraft aerial photography cloud in patent application CN201210179480.3 Controller and its control method, these devices all have bulky, complicated structure

And these devices are used independently of the UAV. When used in conjunction with the UAV, two single-chip controllers are required, thus causing the repeated use of parts and increasing the quality burden of the UAV.

Among these devices, the structure is complex, including complex devices such as pan and tilt, and these devices contain multiple parts, which cause problems such as large mass, inconvenient portability, and difficult operation.

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