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Method for characterizing land utilization/land cover (LULC) change

A land cover and characterization technology, applied in data processing applications, instruments, resources, etc., can solve problems such as no formal expression and no clear method.

Pending Publication Date: 2022-01-04
HUBEI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there is no formal expression of "NDVI and other vegetation indexes have the ability to characterize land use / land cover (LULC) change", and there is no clear method for how to represent it

Method used

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Examples

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Embodiment Construction

[0011] The principles and features of the present invention are described below, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0012] It should be noted that other vegetation indices mentioned in the present invention refer to other existing vegetation indices other than NDVI, such as LAI, RVI, EVI, SAVI, GVI, and PVI.

[0013] In the initial stage of crop growth, the vegetation coverage is low, and the NDVI has a small value. When the vegetation coverage increases during the peak crop growth season, the NDVI also increases. After the crops are harvested and there is no vegetation coverage, the NDVI is close to zero. In the natural year cycle, regardless of the specific time point, the bare soil or the corresponding pixel at the beginning of crop growth has a small NDVI value, while the crop has the largest NDVI value when it grows most vigorously. Vegetation indices such as single tim...

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Abstract

The invention relates to a characterization method of land utilization / land cover (LULC) change, comprising following steps of: taking a static NDVI as a core, directly utilizing the NDVI as a quantitative calculation index, or deriving a new quantitative calculation index based on the NDVI, and using the NDVI as a core to characterize the land utilization / land cover (LULC) change. According to the method, the change of land utilization / land cover (LULC) can be represented, and inspiration can be provided for many applications related to land utilization such as land utilization planning, land utilization evaluation and land utilization suitability evaluation.

Description

technical field [0001] The invention belongs to the field of land use science and technology, and in particular relates to a characterization method for land use / land cover (LULC) changes. Background technique [0002] Different types of land use conversion will inevitably lead to differences in NDVI due to the difference in green vegetation biomass before and after conversion. Based on this characteristic, NDVI has been widely used in land use classification, land use change, and land cover mapping. These applications comprehensively reflect The potential of NDVI to characterize land use change. The wide application of vegetation indexes such as NDVI in agricultural land use classification and mapping, monitoring and evaluation of land resource use status, land use status identification and cultivated land optimization, inversion of key surface parameters in ecological environment analysis, etc., shows that its impact on land use / land The change of land cover (LULC) has co...

Claims

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Application Information

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IPC IPC(8): G06Q10/06
CPCG06Q10/06393
Inventor 刘彦文周霞何宗宜郝汉舟钟儒刚
Owner HUBEI UNIV OF SCI & TECH
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