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A method of photogrammetry for forest fixed plots

A technology of photogrammetry and fixed plots, applied in the field of photogrammetry of forest fixed plots, can solve the problems of poor accuracy, long data acquisition cycle, low efficiency, etc., and achieve the effects of strong applicability, reduced measurement work intensity, and fast investigation

Active Publication Date: 2017-07-21
BEIFANG TT AVIATION TECH DEV BEIJING CO LTD
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  • Description
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AI Technical Summary

Problems solved by technology

[0007] In order to overcome the disadvantages of long data acquisition period, low efficiency and poor precision in the traditional method of measuring tree diameter at breast height and tree height, improve efficiency and precision, and shorten the period, the purpose of the present invention is to provide a forest measurement method with an ordinary digital camera upright photography

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  • A method of photogrammetry for forest fixed plots

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Embodiment Construction

[0019] (1) Under arbitrary terrain conditions, first select a fixed sample plot of 20m×20m, and design the photographic baseline along the diagonal direction of the sample plot, as shown in the figure, design the photographic baseline along AC, S 1 and S 2 are two observation points in the baseline direction, S 1 and S 2 On both sides of the center point O of the sample plot and at the same distance from point O, the horizontal distance between the two observation points is 2m. In addition, a red and white flower pole with equal intervals is set at any position in the photographic field of view as Measurement reference object;

[0020] (2) Under the condition of ensuring any photography, use a fixed-focus digital camera to take two samples of digital photos;

[0021] (3) At the fixed point S 1 Place a fixed-focus digital camera on the point, aim at point A in the diagonal direction of the sample plot, and take a digital photo. Then, turn the camera clockwise to take pictur...

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Abstract

The invention relates to a scheme for photographing and measuring a forest permanent sample plot; the forest permanent sample plot is freely photographed at two fixed observation points in the diagonal line of the sample plot by erecting vertical sighting rods in a photographing view field through fixed-focus digital cameras; and the coordinate, the diameter at the breast height, the tree height and the wood volume of each sample tree in the sample plot and the stand volume of the sample plot are calculated by analyzing an obtained sample plot digital photo according to a relevant mathematical model and a photographing and measuring analytic formula. The characteristic parameters of a forest are calculated simply, rapidly and quantitatively; a tool is simple and convenient to operate; the efficiency and the precision for measurement and calculation are improved; and the survey of the forest permanent sample plot is realized rapidly and conveniently.

Description

[0001] 1. Technical field [0002] The invention relates to a method for photogrammetry of a fixed forest plot. A fixed-focus digital camera is used to randomly photograph a fixed forest plot at two fixed observation points. The coordinates, diameter at breast height, tree height, volume and stand volume of each sample tree in the sample plot were obtained by analyzing the digital photos of the plot. [0003] 2. Background technology [0004] The coordinates, diameter at breast height, tree height, volume and stand volume of sample plots are important survey factors in the process of forest resource investigation. The current measurement method is contact measurement. Due to the influence of terrain and understory shrubs, the quantity It is time-consuming and labor-intensive to measure the various factors of each sample tree in the sample plot, and requires one person to measure and record. The cost of manpower and material resources is high, and the measurement efficiency is l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C11/00
CPCG01C11/00G01C11/08
Inventor 冯仲科杨立岩祁曼
Owner BEIFANG TT AVIATION TECH DEV BEIJING CO LTD
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