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Construction of urban spatial characteristic index based on noctilucent remote sensing data and evaluation method of urban system

A technology of remote sensing data and spatial characteristics, applied in the field of space remote sensing, can solve the problems of outdated DMSP/OLS data, inability to reflect the detailed changes of time and space of regional urbanization development, and concentration in large areas, so as to achieve accurate and reliable data sources Effect

Inactive Publication Date: 2019-03-12
XUCHANG UNIV
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AI Technical Summary

Problems solved by technology

[0005] However, due to the limitations of the time range (1992-2013), temporal resolution (1 year) and spatial resolution (1km) of the existing nighttime light data, researchers at home and abroad use the US DMSP / OLS nighttime light data to analyze urbanization development. In the process, the time is concentrated between 1992 and 2013, and the global coverage is only once a year, and the research areas are mostly concentrated in larger areas
For the current rapid development of urban construction, DMSP / OLS data is relatively old, and cannot reflect the detailed changes in time and space of regional urbanization development

Method used

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  • Construction of urban spatial characteristic index based on noctilucent remote sensing data and evaluation method of urban system
  • Construction of urban spatial characteristic index based on noctilucent remote sensing data and evaluation method of urban system
  • Construction of urban spatial characteristic index based on noctilucent remote sensing data and evaluation method of urban system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1. Acquisition and extraction of urban lighting area data in the research area.

[0037] Taking Henan Province as the regional object. In view of the lack of spatial information in the statistical data of urban land area in Henan Province, it is difficult to meet the shortcomings of the research needs of urbanization spatial pattern and change process, and compare the advantages and disadvantages of each threshold extraction method in the extraction of urban spatial information in the existing research results, using statistical data The comparison method is improved on this basis to process the night light data of "Luojia No. 1" and accurately extract the urban light areas in the study area. After obtaining the “Luojia-1” luminous remote sensing image data in the evaluation area, splice and crop as needed (different areas may be completely covered by one scene to multiple scenes, so some areas need to be spliced; at the same time, the remote sensing image da...

Embodiment 2

[0040] Embodiment 2. Construct urban spatial characteristic index and urban system evaluation standard.

[0041] Based on the night light data of "Luojia No. 1", taking the extracted urban light area as the basic unit, a new light index that does not need to determine the weight but is simpler, has a certain physical meaning, and can reflect the comprehensive level of urban development is used as Index of urban spatial characteristics. At the same time, the regression model of this index and the composite index of urbanization level based on statistical data is established, and it is applied to the study of urban system for evaluation and analysis.

[0042] Specifically, the urban spatial characteristic index is named LuoJia-1 night light index, or LJ-1NLI for short. This index is the light index of the product of the relative light intensity of the regional light area and the area ratio of the light area. The advantage is that it does not require Determining the weight is a ...

Embodiment 3

[0050] Embodiment 3. Put forward suggestions and prospects for future urbanization development in combination with traditional urban geography theories.

[0051] The above-mentioned examples 1 and 2 take the urban system of Henan Province as the research object, take the night light data of "Luojia No. 1" as the main data, use GIS and RS as the main means of data processing and analysis, and combine various spatial data, Apply the theory of traditional urban geography to evaluate and look forward to the development of urbanization in the study area.

[0052] In this example, on the basis of accurately extracting the urban boundary based on the data of "Luojia No. 1" and constructing a new urban spatial characteristic index for the evaluation of the urban system in Henan Province, further, combined with the traditional urban geography theory, a proposal for future urbanization Suggestions and prospects for development.

[0053] Combining the road network, water system data and...

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Abstract

The invention discloses a method for constructing urban spatial characteristic index and evaluating urban system based on luminous remote sensing data. The method comprises the following steps: A, collecting night light remote sensing data; B, extract that urban lighting area as a basic unit, and construct a lighting index as the urban spatial characteristic index, which does not need to determinea weight, has practical physical significance, and has low computational time complexity and space complexity; C. Obtain the index standard for regional urbanization system evaluation and analysis, and use the index standard to evaluate the regional urbanization system. The invention accurately constructs the urban spatial characteristic index based on the luminous remote sensing data for the first time, and applies the index to the evaluation of the urban system, which embodies great practical value in the practical application of the regional urbanization analysis.

Description

technical field [0001] The invention relates to the technical field of space remote sensing, in particular to a technical method for using space remote sensing data to construct urban spatial feature indexes and evaluate urban systems. Background technique [0002] As the political center and economic center of regional development, cities can effectively drive the development of surrounding areas in all aspects. Therefore, the development of urbanization has become the only way for the development of human society. To a certain extent, the level of urbanization can comprehensively reflect the economic and social development of the region. The level of urbanization development is closely related to factors such as resource endowment, ecological environment, lifestyle, values, and economic development in the region. The level of urbanization can be used to measure the speed of urbanization, while the quality of urbanization can be used to measure the advantages and disadvan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/29G06F17/18G06Q10/06
CPCG06F17/18G06Q10/06393
Inventor 张鹏飞易航耿利川
Owner XUCHANG UNIV
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