SVM-GCA (Support Vector Machine-based Geographical Cellular Automata)-based urban spatial development simulation and prediction method

A prediction method and urban technology, applied in the field of simulation and prediction technology of urban space development, to achieve the effect of less sample quantity, high calculation efficiency and high precision

Inactive Publication Date: 2016-12-21
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

This method can overcome the linearity defect of the existing geographic cell model, and has faster simulation speed and higher simulation prediction accuracy

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  • SVM-GCA (Support Vector Machine-based Geographical Cellular Automata)-based urban spatial development simulation and prediction method
  • SVM-GCA (Support Vector Machine-based Geographical Cellular Automata)-based urban spatial development simulation and prediction method
  • SVM-GCA (Support Vector Machine-based Geographical Cellular Automata)-based urban spatial development simulation and prediction method

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Embodiment Construction

[0038] The technical solution of the present invention will be described in detail below in conjunction with the urban space development embodiment of Chengdu and the accompanying drawings.

[0039] Such as figure 1 Shown:

[0040] S1. Establish an urban cellular automaton model SVM-GCA based on support vector machines, including:

[0041] S11. Define the state of the urban cell: using a square cell, the state of the urban cell is the land use property of the urban land corresponding to the cell, 1 indicates that the cell is urban land, and -1 indicates that the cell is non-urban land;

[0042] S12. Determine the neighborhood relationship of the city cell: the Moore-type neighborhood is used, and the 8 adjacent cells under the cell are called the neighborhood of the cell, and the neighborhood radius is 1. In this model, in the n-dimensional cell space, the number of neighbors of a cell is 3 n -1. While the Moore-type neighborhood ensures the accuracy, the amount of calcula...

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Abstract

The invention belongs to the virtual geographic environment and simulation research field of geographic information systems, and relates to urban spatial development simulation and prediction technologies, in particular, an SVM-GCA (Support Vector Machine-based Geographical Cellular Automata)-based urban spatial development simulation and prediction method. According to the method of the invention, a support vector machine technology is adopted to design an urban cellular land use property change decision function; a support vector machine-based geographic cellular model is put forward based on the urban cellular land use property change decision function; and the urban spatial development simulation and prediction method is put forward based on the model. According to the method of the invention, the linear defect of an existing geographic cellular model is eliminated. The method has high simulation speed and high simulation precision. The support vector machine technology is adopted to build the urban cellular model, so that the typical nonlinear problem of geographic cellular state prediction is solved, and therefore, the problem of large error of a simulation prediction result caused by the linearity of a traditional geographic cellular model can be solved. Compared with an existing method, the method of the invention just requires a small number of samples, has higher computation efficiency and higher precision.

Description

technical field [0001] The invention belongs to the research field of virtual geographical environment and simulation of geographic information system, and relates to the simulation and prediction technology of urban space development. Background technique [0002] With the continuous development of the global economy, urbanization and sustainable urban development have become hot topics in global urban development. Urban space is the carrier of various functions of the city, and the rationality of its form will have a decisive impact on the quality of life of urban residents, and then affect the survival and development of the entire human being. In the process of rapid urban expansion on a global scale, rapid changes in urban spatial form have led to the emergence of many acute practical problems such as improper use of land resources, loss of cultivated land, ecological environment damage, serious pollution, and imbalanced urban function layout. Carrying out research on ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/26G06K9/62
CPCG06Q10/04G06Q50/26G06F18/2411
Inventor 韩效刘民岷
Owner SOUTHWEST JIAOTONG UNIV
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