CN104089554A - Method for measuring forest structure parameters through angle gauge counting trees - Google Patents
Method for measuring forest structure parameters through angle gauge counting trees Download PDFInfo
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- CN104089554A CN104089554A CN201410332376.2A CN201410332376A CN104089554A CN 104089554 A CN104089554 A CN 104089554A CN 201410332376 A CN201410332376 A CN 201410332376A CN 104089554 A CN104089554 A CN 104089554A
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Abstract
The invention provides a method for measuring forest structure parameters through angle gauge counting trees. The method is characterized by including the steps that an angle gauge serves as a tool, the counting trees in a sample plot are determined through an angle gauge counting rule, the counting trees are counted and measured, the uniform angle index, the mixing degree, the size ratio and the uniformity in the sample plot are calculated through formulas, and therefore the space structure parameters of a forest are rapidly estimated. According to the method, the adopted tool is simple and conventional, the forest structure measurement efficiency and accuracy are improved, and the defects that the forest structure parameter counting and measuring work is complex and accuracy is limited in the prior art are overcome.
Description
One, technical field
The present invention relates to a kind of method of utilizing angle gauge counting wood to measure forest structure parameter, particularly utilize the forest parameters instrumentation that angle gauge is instrument.
Two, technical background
Forest structure parameter is the basic data of forest management and administration, is the important means of understanding stand structure information.In traditional measuring forest, the assay method of use adopts on-site inspection, and workload is large, cost is high, precision is restricted.Technological means aspect, utilizes remote sensing image to carry out inverting, extraction in recent years, but the Extraction of Image precision of low resolution is lower, and the interpretation of high-resolution impact and aviation image and extraction workload are large, and the cycle is long.Utilize three-dimensional laser scanner to carry out the quantitative examination of forest parameters, instrument costliness, heaviness, can not meet forest parameters in production practices fast, Accurate Determining demand.
So in traditional forest inventory investigation, the measurement of forest parameters is subject to the restriction of instrument and equipment, land occupation condition, operation technique method, workload is large, and the cycle is long, and low precision is difficult to obtain fast promising result.Traditional angle gauge method, the multiplex standing forest average section of measuring is long-pending, thereby calculates the density of crop, the forest characteristics parameter such as accumulate, to the rarely seen report of the use of forest structure parameter.This patent uses angle gauge method, and simple to the selection of surroundings wood, instrumentation is rapid, relates to parameter many, can improve speed and precision that forest parameters is measured, has effectively promoted determination techniques and the method for forest parameters.
Three, summary of the invention
The defects such as workload is large in order to improve in traditional forest parameters assay method, low precision, instrument and equipment heaviness, the object of this invention is to provide a kind of method of utilizing angle gauge counting wood to survey forest structure parameter.
The object of the present invention is achieved like this:
1) wood centered by selected sample trees, utilizes angle gauge in sample ground, to select counting wood, records wooden strain number of each counting, relative coordinate, seeds, the diameter of a cross-section of a tree trunk 1.3 meters above the ground, the height of tree, the hat width factor;
2) forest spatial structure parameters of the counting wood that Qiu Suan center wood closes on, the uniform angle that utilizes calculated with mathematical model sample
utilize the mixed friendship degree on calculated with mathematical model sample ground
utilize the size on calculated with mathematical model sample ground to compare number
utilize calculated with mathematical model uniformity coefficient
wherein, W
ifor uniform angle, n is the wooden number of counting, and i is angle gauge Dian Suoqu center wood number, and j is the wooden number of counting, z
ijfor the counting of uniform angle, W
ifor mixed friendship degree, v
ijfor uniform angle count value, U
ifor size is than number, k
ijfor size is than the count value of number, m is uniformity coefficient, α
jcentered by wood and i counting wooden become little angle;
This invention has the following advantages:
1. using first angle gauge method to measure forest structure parameter, is the expansion of traditional angle gauge function;
2. improve efficiency and the precision of the work of forest parameters instrumentation, used instrument to be simple and easy to carry, commonly easily obtained, greatly reduced investigation work amount and cost;
Four, brief description of the drawings
Below in conjunction with accompanying drawing and example, the present invention is further described.
Fig. 1 to 4 is measuring principle figure of the present invention.
Five, embodiment:
The method of utilizing angle gauge counting wood to survey forest structure parameter is different from an existing method, is specifically:
(1) uniform angle, mixed friendship degree, big or small than the computing method of number:
1. in sample ground, choose wood centered by suitable trees, Yi Ci center wood is angle gauge point, carry out around survey taking angle gauge as instrument, count according to angle gauge counting principle, measure and the records center wooden height of tree, the diameter of a cross-section of a tree trunk 1.3 meters above the ground, hat width, the seeds wooden with counting, angle gauge technical regulation is: when visual angle that viewpoint and angle gauge sheet form with around close on when cut mutually at wooden diameter of a cross-section of a tree trunk 1.3 meters above the ground place and be counted as 1, when tangent, be counted as 0.5, from time be counted as 0; 2. utilize mathematical model
ask calculation uniform angle, wherein z
ijcounting rule for: the little angle becoming when center wood and j counting are wooden is less than standard angle (α
0=72 °) time be counted as 1, otherwise be counted as 0; 3. utilize mathematical model
ask and calculate mixed friendship degree, wherein v
ijcounting rule be: when center wood is non-ly counted as 1 time of the same race with j, otherwise be counted as 0; 4. utilize mathematical model
ask and calculate mixed friendship degree, wherein k
ijcounting rule be: selected a certain Comparative indices (as the diameter of a cross-section of a tree trunk 1.3 meters above the ground, the height of tree, hat width etc.), when j Ke Mubi center, wood hour is counted as 1, otherwise is counted as 0;
(2) computing method of uniformity coefficient, is characterized in that: ①Yi center wood is reference point, use hand-held total powerstation to measure distance, inclination angle, the position angle of each counting Mu Yu center wood, thereby try to achieve the minimum angle α that center wood i becomes with the wooden j of counting
j; 2. utilize the uniformity coefficient on this sample ground of calculated with mathematical model
Claims (3)
1. a method of utilizing angle gauge counting wood to measure forest structure parameter, it is characterized in that: taking angle gauge as instrument, determine the counting wood in sample ground according to angle gauge counting rule, count wooden forest mechanism characteristics parameter by measuring and calculating, calculate the forest spatial structure parameters in sample ground, comprise that uniform angle, mixed friendship degree, size are than number, uniformity coefficient, concrete steps are as follows:
1) wood centered by selected sample trees, utilizes angle gauge in sample ground, to select counting wood, records wooden strain number of each counting, relative coordinate, seeds, the diameter of a cross-section of a tree trunk 1.3 meters above the ground, the height of tree, the hat width factor;
2) forest spatial structure parameters of the counting wood that Qiu Suan center wood closes on, the uniform angle that utilizes calculated with mathematical model sample
utilize the mixed friendship degree on calculated with mathematical model sample ground
utilize the size on calculated with mathematical model sample ground to compare number
utilize calculated with mathematical model uniformity coefficient
wherein, W
ifor uniform angle, n is the wooden number of counting, and i is angle gauge Dian Suoqu center wood number, and j is the wooden number of counting, z
ijfor the counting of uniform angle, W
ifor mixed friendship degree, v
ijfor uniform angle count value, U
ifor size is than number, k
ijfor size is than the count value of number, m is uniformity coefficient, α
jcentered by wood and i counting wooden become little angle.
2. uniform angle according to claim 1, mixed friendship degree, size are than the computing method of number, it is characterized in that: 1. in sample ground, choose wood centered by suitable trees, Yi Ci center wood is angle gauge point, carry out around survey taking angle gauge as instrument, count according to angle gauge counting principle, measure and the records center wooden height of tree, the diameter of a cross-section of a tree trunk 1.3 meters above the ground, hat width, the seeds wooden with counting, angle gauge technical regulation is: when visual angle that viewpoint and angle gauge sheet form with around close on when cut mutually at wooden diameter of a cross-section of a tree trunk 1.3 meters above the ground place and be counted as 1, when tangent, be counted as 0.5, from time be counted as 0; 2. utilize mathematical model
ask calculation uniform angle, wherein z
ijcounting rule for: the little angle becoming when center wood and j counting are wooden is less than standard angle (α
0=72 °) time be counted as 1, otherwise be counted as 0; 3. utilize mathematical model
ask and calculate mixed friendship degree, wherein v
ijcounting rule be: when center wood is non-ly counted as 1 time of the same race with j, otherwise be counted as 0; 4. utilize mathematical model
ask and calculate mixed friendship degree, wherein k
ijcounting rule be: selected a certain Comparative indices (as the diameter of a cross-section of a tree trunk 1.3 meters above the ground, the height of tree, hat width etc.), when j Ke Mubi center, wood hour is counted as 1, otherwise is counted as 0.
3. the computing method of uniformity coefficient according to claim 1, it is characterized in that: ①Yi center wood is reference point, use hand-held total powerstation to measure distance, inclination angle, the position angle of each counting Mu Yu center wood, thereby try to achieve the minimum angle α that center wood i becomes with the wooden j of counting
j; 2. utilize the uniformity coefficient on this sample ground of calculated with mathematical model
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105138831A (en) * | 2015-08-14 | 2015-12-09 | 北京林业大学 | Method of evaluation technique for determining forest loss of burned forest area by utilizing angle gauge method |
| CN106382913A (en) * | 2015-07-26 | 2017-02-08 | 北京林业大学 | Hand-held electronic tree measuring instrument |
| CN106546223A (en) * | 2015-09-18 | 2017-03-29 | 北京林业大学 | A kind of method that use digital camera carries out the design of angle gauge point sampling Optimal Control angle |
| CN114021688A (en) * | 2021-11-09 | 2022-02-08 | 丰睿 | Data acquisition memory for urban road greening tree species resource investigation and use method thereof |
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| CN114021688A (en) * | 2021-11-09 | 2022-02-08 | 丰睿 | Data acquisition memory for urban road greening tree species resource investigation and use method thereof |
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