Accurate estimation method for measuring forest sub compartment accumulation and biomass by utilizing angle gauge

A biomass and angle gauge technology, applied in measuring devices, measuring instruments, surveying and navigation, etc., can solve problems such as large differences in angle gauge points, high requirements, and measurement errors, so as to improve work efficiency and avoid measurement error, and the effect of reducing field workload

Active Publication Date: 2013-06-19
BEIJING FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This requires high work experience for field investigators. Investigators with different work experience have great differences in the selection of angle gauge points, and differences in operator experience will lead to measurement errors.

Method used

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  • Accurate estimation method for measuring forest sub compartment accumulation and biomass by utilizing angle gauge
  • Accurate estimation method for measuring forest sub compartment accumulation and biomass by utilizing angle gauge
  • Accurate estimation method for measuring forest sub compartment accumulation and biomass by utilizing angle gauge

Examples

Experimental program
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Effect test

Embodiment Construction

[0016] Randomly select n corner gauge points in the forest class, count the corner gauges, and record as Using digital and analog (1)

[0017]

[0018] According to the measured value of the square gauge of n square gauge points Estimate the count value of r square gauge points, denoted as In digital model (1), According to the digital model (2) obtain; By digital model (3) m p i p j = c o e - k 2 d p i p j 2 obtain; By digital model (4) m ...

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Abstract

The invention discloses an accurate estimation method for measuring forest sub compartment accumulation and biomass by utilizing an angle gauge. The accurate estimation method disclosed by the invention comprises the following steps of: estimating other angle gauge point count values by utilizing 2-5 actual measurement angle gauge point count values according to the area of a forest sub compartment, and then estimating forest sub compartment accumulation and biomass according to the actual measured angle gauge count values and the estimated angle gauge point count values. By adopting the accurate estimation method disclosed by the invention, field workload of forest investigation is greatly reduced, and measurement error caused by selection difference of positions of angle gauge points is also greatly reduced.

Description

1. Technical field [0001] The present invention relates to an accurate estimation method for measuring the accumulation and biomass of forest subcompartments with angle gauges, in particular, using the actually measured 2-5 angle gauge point counting value, through the least squares estimation method, using the unknown angle gauge points to the known Knowing the method of estimating the distance of the angle gauge points to obtain the count value of 5-36 angle points. 2. Technical background [0002] So far, the angle gauge is still widely used in forestry as a rapid forest stand determination tool, but in the actual operation of the field investigation, there are still the following problems. [0003] 1. The number of observation points of the diagonal gauge is required to be large. In my country's forestry survey regulations, it is clearly stipulated that the number of corner gauge points is determined according to the stand area, as shown in Table 1. If the sampling acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C15/00
Inventor 冯仲科徐伟恒焦有权高原
Owner BEIJING FORESTRY UNIVERSITY
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