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Annual regional vegetation coverage calculation method

A technology of vegetation coverage and calculation method, which is applied in the field of annual regional vegetation coverage calculation, and can solve problems such as differences in growth conditions

Active Publication Date: 2018-04-13
河北省科学院地理科学研究所
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, in reality, there are often various types of vegetation coverage in an area, and each type of vegetation has a different growing season; even for the same type of vegetation, due to differences in soil conditions, water conditions, and planting time, etc. difference in growth

Method used

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  • Annual regional vegetation coverage calculation method
  • Annual regional vegetation coverage calculation method
  • Annual regional vegetation coverage calculation method

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Embodiment Construction

[0067] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0068] In this embodiment, the remote sensing images of a certain area in the same year and in four different time phases are taken as an example for illustration.

[0069] refer to figure 1 , figure 1 It is a schematic flow chart of a method for calculating annual regional vegetation coverage of the present invention, comprising the following steps:

[0070] S1, collect all remote sensing images in the same annual growing season in the region, perform precise radiometric calibration and atmospheric radiation correction on them, and obtain remote sensing image results that can represent the true ...

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Abstract

The invention discloses an annual regional vegetation coverage calculation method. The method comprises steps that accurate radiation calibration, atmospheric correction and geometric registration arecarried out for all remote sensing images of the same annual region, and a remote sensing image result set is acquired, based on the constructed cloud layer index, the shadow index, the background index and the vegetation index, the corresponding special information is extracted; remote sensing images of different time phases are processed through utilizing the de-cloud algorithm and the de-shadow algorithm respectively; spatial synthesis of the single phase vegetation index information is carried out; fusion of the annual multi-phase information is carried out, the spatial distribution map of the annual regional vegetation index information is calculated; and lastly, the spatial distribution map of the annual regional vegetation coverage information is calculated. The method is advantaged in that influence of weather, terrain, phase, vegetation type and environment factors on the vegetation coverage rate is eliminated, an annual regional vegetation coverage calculation problem is solved, accuracy and reliability of regional vegetation coverage calculation are improved, the operation process is simple and flexible, and the method is easy for popularization and application in the regional scale.

Description

technical field [0001] The invention relates to a method for calculating annual regional vegetation coverage, which belongs to the application fields of ecological construction, ecological environment protection, disaster monitoring, ecological function evaluation and the like. Background technique [0002] Vegetation coverage is usually defined as the percentage of the vertical projected area of ​​vegetation (leaves, stems, branches) on the ground to the total area of ​​the statistical area. Occupies an important position in the atmosphere, soil, hydrosphere and biosphere. Vegetation coverage is considered to be the most effective indicator in the assessment of land degradation such as desertification, rocky desertification, and salinization; it reflects the impact of the ecosystem on soil erosion, is a positive factor for soil erosion control, and is an important indicator for soil erosion. An important indicator of evaluation and comprehensive management is also an impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/33G06T7/60G06K9/00
CPCG06T7/33G06T7/60G06T2207/10032G06T2207/30188G06V20/188
Inventor 孙雷刚徐全洪刘剑锋何娇娇鲁军景张可慧蔡湛刘芳圆马晓倩
Owner 河北省科学院地理科学研究所
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