Urban development land suitability evaluation method based on principal component analysis

Abstract

The invention discloses an urban development land suitability evaluation method based on principal component analysis, and the method comprises the steps: selecting suitability evaluation index factors, carrying out the normalization of the evaluation index factors, and building a single-factor suitability evaluation model; carrying out principal component analysis on the single-factor suitabilityevaluation model, solving the weight of each principal component by utilizing an accumulated contribution rate, and establishing a comprehensive suitability evaluation model to obtain a comprehensivesuitability evaluation value; combining a Kriging interpolation method and a K_Means spatial clustering method to carry out spatial prediction and grading on the suitability evaluation of the urban development land; performing spatial diversity evaluation on the evaluation result by using a geographical detector, finally verifying the precision and effectiveness evaluation of the evaluation result, performing suitability statistics and evaluation, and developing a suitability extension direction analysis. According to the urban development land suitability evaluation method, the artificial subjective influence of evaluation index grading and index weight determination is avoided, so that the evaluation result has higher evaluation precision and effectiveness.

Description

technical field [0001] The invention relates to the field of land for urban development, in particular to a method for evaluating the suitability of land for urban development based on principal component analysis. Background technique [0002] With the accelerated development of urbanization and industrialization, China's urban land has expanded unprecedentedly, people's exploitation and utilization of various resources have reached unprecedented intensity, and the contradiction between man and the natural environment has become increasingly prominent, resulting in a series of complex social conditions Environmental and environmental issues have put enormous pressure on urban and regional ecological security, affecting the sustainable development of cities and regions. Therefore, how to rationally develop, utilize and optimize urban land resources, scientifically and effectively protect urban ecological environment, and guide the rapid and healthy development of Chinese cit...

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Problems solved by technology

At present, land suitability evaluation methods mainly include expert system method, logical rule combination method, analytic hierarchy process, network analysis method, fuzzy comprehensive evaluation method, orderly weighted average method, minimum cumulative resistance method, and matter-element analysis method. Although the method is improved compared with the early map overlay method and weighted overlay method, there are still problems such as the large influence of human factors and the subjective uncertainty of the evaluation factor standard quantification, which reduces the scientificity and objectivity of the evaluation results to a certain extent.

In recent years, some scholars have also proposed to use Bayesian network, machine learning method combined with K_Means clustering and BP neural network to evaluate urban suitability, which has the advantages of high computational efficiency, but the index weight distribution is still based on the subjective experience of experts, and there are certain limitations. human factors

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