CN103185556A - Tree crown competition factor calculating and measuring method taking prism-free full-station instrument as tool - Google Patents

Abstract

The invention discloses a tree crown competition factor calculating and measuring method taking a prism-free full-station instrument as a tool. The diameters at breast height and crown breadths of free trees in a standing forest are measured by taking the prism-free full-station instrument as the tool, data is stored and processed by a PDA (personal digital assistant), the diameters at breast height and crown breadths of free trees are used for establishing a linear recession equation, and the tree crown competition factor of the standing forest is measured and calculated; the calculation accuracy of the tree crown completion factor of the standing forest is improved greatly; and the defects that a simple method has low precision but a method with high precision has a complicated process in the conventional tree crown competition measuring and calculating are overcome.

Description

A kind of is the crown competition factor measuring method of instrument with the non-prism total powerstation

One, technical field

The present invention relates to a kind of is the method for measuring forest of instrument based on the non-prism total powerstation, particularly utilizes the non-prism total powerstation to be the crown competition factor instrumentation of instrument.

Two, technical background

Traditional measuring forest technological means falls behind, and is based upon on the basis of handworks such as mechanical pointer compass location survey, the interpretation of boat sheet, and the cycle is long, and efficient is low, and low precision can not adapt to the monitoring requirements to the forest reserves and ecologic environment far away.It is the macroscopic view of major technique, extensive stage that domestic monitoring for forest only is confined to remote sensing and conventional ground investigation.Accurately measuring of some index also is far from solving gratifying degree as problems such as crown competition factor, forest are accumulated, standing forest data such as mean height, average density are obtained theory, technology, instruments.

So crown competition factor, forest traditional in forest resource monitoring are accumulated, the acquisition methods of mean height, average density etc. is subjected to the restriction of forest mesorelief complicated factor, what make these data obtains that workload is big, precision is not high, and realizing therefore that these data are quick and precisely obtained becomes this area scientific and technical personnel problem anxious to be solved.The present invention is by various effective processing of the data using the non-prism total powerstation and obtain, reach the system model of simplifying the field operation measurement, utilizing PDA (Personal Digital Assistant, personal electric assistant) to carry out the data storage and handle, set up mathematical regression model, utilize intelligent interior industry to calculate simultaneously.This system combination measurement of coordinates, area measurement, cubing, multiple apart from measurement of angle etc. in the industry processing capacity in one, promoted the speed that interior industry data are handled comprehensively, intellectuality and accuracy have effectively improved the particularly means of crown competition factor measuring and calculating of forest monitoring technology.

Three, summary of the invention

Long for overcoming the classic method data acquisition cycle, efficient is low, the shortcoming of low precision, raise the efficiency and precision, the shortening cycle, realize accurately measuring of standing forest crown competition factor, the invention provides a kind of is the crown competition factor measuring method of instrument based on the non-prism total powerstation, it is characterized in that: be that instrument is measured the free tree diameter of a cross-section of a tree trunk 1.3 meters above the ground and the hat width of cloth in the standing forest with the non-prism total powerstation, by PDA (Personal Digital Assistant, the personal electric assistant) carries out data storage and processing, utilize the free tree diameter of a cross-section of a tree trunk 1.3 meters above the ground and the hat width of cloth to set up equation of linear regression, realize the measuring and calculating of forest crown competition factor.

Main summary of the invention:

1. trees diameter of a cross-section of a tree trunk 1.3 meters above the ground instrumentation

2. the potential maximum of trees is preced with width of cloth instrumentation

3. crown competition factor measuring and calculating

This invention is compared with existing method and is had the following advantages:

(1) significantly improve the work efficiency of trees factor instrumentation, in traditional trees factor investigation, measuring needs to use instruments such as surveying chi, box compass, diameter of a cross-section of a tree trunk 1.3 meters above the ground chi, needs the registrar to carry out on-the-spot hand-kept simultaneously, and operation is loaded down with trivial details.This research as the assize instrument, cooperates PDA to carry out field notes with the non-prism total powerstation simultaneously, has realized the intellectuality of surveying instrument, and is integrated, real-time, high reliability.Alleviate to a certain extent and measure operation intensity, expanded the business field of instrument of surveying and mapping.

(2) realized high-acruracy survey to the trees factor, classic method uses measurement instruments such as surveying chi, diameter of a cross-section of a tree trunk 1.3 meters above the ground chi to measure, method is comparatively simple, and error is bigger, especially utilizes and surveys when chi is preced with width of cloth measurement and can only measure roughly by estimating its horizontal direction projection.Measure trees by the non-prism total powerstation, can realize not disturbed by factors such as the height of tree, landform to the accurate measurement of the trunk diameter of a cross-section of a tree trunk 1.3 meters above the ground and the hat width of cloth, obtain factors of enumeration in real time.This is particularly important for the accurate Calculation crown competition factor.

Four, description of drawings

The present invention is further described below in conjunction with accompanying drawing and example.

Fig. 1 measures for the trunk diameter of a cross-section of a tree trunk 1.3 meters above the ground, and Fig. 2 is that the free tree crown width of cloth is measured.

Five, embodiment:

Be that the crown competition factor measuring method of instrument is different with existing method based on the non-prism total powerstation, specifically be:

(1) the O point is settled the non-prism total powerstation in standing forest, at first total powerstation is aimed at the free tree trunk, guarantees sight line and trunk 1.3m place tangent (accompanying drawing 1), adopts total powerstation opposite side measuring function, utilizes mathematical model 1.

Accurately measure the trees diameter of a cross-section of a tree trunk 1.3 meters above the ground,, real-time storage is to PDA, and the free tree tree crown hat width of cloth at first aims at the free tree tree crown when measuring, and guarantees sight line and tree crown outermost tangent (accompanying drawing 2), adopts total powerstation opposite side measuring function, utilizes mathematical model 1.

Accurately measure the free tree crown width of cloth, real-time storage is to PDA;

(2) with PDA data importing computing machine, utilize mathematical model 2. CW=a+bD set up the free tree diameter of a cross-section of a tree trunk 1.3 meters above the ground (D) and the hat width of cloth (CW) equation of linear regression;

(3) utilize mathematical model 3.

Calculate the potential maximal tree crown of trees long-pending (MCA) _i, the meter diameter of a cross-section of a tree trunk 1.3 meters above the ground is D _iIts maximal tree crown of free tree long-pending be (MCA) _i

(4) utilize mathematical model 4. $\mathrm{CCF}=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\left(\mathrm{MCA}\right)}_i=\frac{\mathrm{\π}}{4000}(a^{2}N+2\mathrm{ab}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{D}_i+b^2\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{D}_i^2)$ Ask and calculate crown competition factor (CCF) value, with all trees (MCA) in the unit area standing forest _iAddition is this standing forest (CCF) value.

Claims (1)

1. one kind is the crown competition factor measuring method of instrument with the non-prism total powerstation, it is characterized in that: be that instrument is measured the free tree diameter of a cross-section of a tree trunk 1.3 meters above the ground and the hat width of cloth in the standing forest with the non-prism total powerstation, by PDA (Personal Digital Assistant, the personal electric assistant) carries out data storage and processing, utilize the free tree diameter of a cross-section of a tree trunk 1.3 meters above the ground and the hat width of cloth to set up equation of linear regression, realize the measuring and calculating of forest crown competition factor, concrete steps are as follows:

1) the O point is settled the non-prism total powerstation in standing forest, and trunk 1.3m place adopts total powerstation opposite side measuring function, utilizes mathematical model 1.

Accurately measure the trees diameter of a cross-section of a tree trunk 1.3 meters above the ground,, real-time storage accurately aims at laser spots at the free tree crown width of cloth outermost when tree crown hat width of cloth is measured to PDA, utilize mathematical model 1.

Accurately measure the hat width of cloth diameter of a cross-section of a tree trunk 1.3 meters above the ground,, real-time storage is to PDA;

2) with PDA data importing computing machine, utilize mathematical model 2. CW=a+bD set up the free tree diameter of a cross-section of a tree trunk 1.3 meters above the ground (D) and the hat width of cloth (CW) equation of linear regression;

3) utilize mathematical model 3.

Calculate the potential maximum hat breadths of trees long-pending (MCA) _i, the meter diameter of a cross-section of a tree trunk 1.3 meters above the ground is D _iIts maximal tree crown of free tree long-pending be (MCA) _i

4) utilize mathematical model 4. $\mathrm{CCF}=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\left(\mathrm{MCA}\right)}_i=\frac{\mathrm{\π}}{40000}(a^{2}N+2\mathrm{ab}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{D}_i+b^2\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{D}_i^2)$ Ask and calculate crown competition factor (CCF) value, with all trees (MCA) in the unit area standing forest _iAddition is this standing forest (CCF) value.

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