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Karst rocky desertification information extraction method

A technology of information extraction and rocky desertification, which is applied in the direction of instruments, character and pattern recognition, computer parts, etc., can solve the problem that there is no corresponding research on the quantitative analysis of the contribution rate of rocky desertification characterization factors, and achieve the effect of rapid extraction

Inactive Publication Date: 2017-11-10
INST OF GEOCHEM CHINESE ACADEMY OF SCI
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Problems solved by technology

[0006] At present, in karst rocky desertification areas, FVC, Albedo, LST comprehensive index has not been used to represent rocky desertification information; there is no corresponding research on the quantitative analysis of the contribution rate of rocky desertification characterization factors

Method used

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  • Karst rocky desertification information extraction method
  • Karst rocky desertification information extraction method
  • Karst rocky desertification information extraction method

Examples

Experimental program
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Embodiment 1

[0050] Take the data of Guizhou Province in 2000 as an example.

[0051] First, extract the karst area. According to the characteristics of rocky desertification, the karst area on the lithology map of the study area is extracted.

[0052] Second, extract the areas where rocky desertification may occur. The land use of the study area is divided into: forest land, shrub forest, grassland, paddy field, dry land, water area, construction land, and unused land. Rocky desertification cannot occur in paddy fields, water areas, and construction land areas, and the potential rocky desertification areas: forest land, shrub forest, grassland, dry land, and unused land are extracted.

[0053] Third, data preprocessing. Preprocess the three types of MODIS remote sensing data: MOD13Q1, MCD43A3, MOD11A12; use the MRT software provided by NASA to batch process the obtained product data, and convert them into ALBERS equal-area projection and WGS-84 coordinate system, and convert the format...

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Abstract

The invention provides a karst rocky desertification information extraction method which comprises the following steps: (1) data preparation: a lithological map, a land utilization graph and a rocky desertification spatial distribution map of the corresponding period; (2) screening of a region: screening a region where rocky desertification possibly occurs from a research region; (3) calculation of a factor spatial distribution map: calculating vegetation coverage, surface reflectance and land surface temperature; (4) calculation of a contribution rate of a factor; (5) fitting of a KRDIM (Karst Rocky Desertification Index Modle); and (6) rocky desertification grading. According to the karst rocky desertification information extraction method, a geographical detector model is used for calculating contribute rates of all factors to rocky desertification characterization, so that a quantitative evaluation index model capable of monitoring interpretations is built; and therefore, precise and efficient extraction of karst rocky desertification information can be realized.

Description

technical field [0001] The invention relates to an accurate and efficient method for extracting karst rocky desertification information. Background technique [0002] Karst areas in Southwest China are generally facing serious rocky desertification problems. This problem has seriously affected the living environment and living standards of people in Southwest China. Therefore, it is very urgent to establish a fast, accurate and efficient rocky desertification interpretation and evaluation model. [0003] At present, the data used in the extraction of karst rocky desertification information mainly include: landsat TM, ETM and remote sensing data such as OLI, ALOS, ASTER, and high-resolution satellites. Although this type of data has the characteristics of high spatial resolution; but the map size is small and the time resolution is low; at the same time, due to the influence of satellite transit time and weather, it is not always possible to obtain suitable and ideal data, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/46
CPCG06V10/462
Inventor 白晓永肖建勇田义超吴璐华钱庆欢
Owner INST OF GEOCHEM CHINESE ACADEMY OF SCI
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