元胞自动机城市增长模型的空间尺度特征分析  

Characterizing the spatial scale effect of urban growth cellular automata model

作　　者：尹长林[1] 张鸿辉[1] 游胜景[2] 陈光辉[1] 刘勤志[3] 

机构地区：[1]中南大学信息物理工程学院,长沙410083 [2]长沙市规划信息服务中心,长沙410013 [3]贵州大学继续教育学院,贵阳550001

出　　处：《测绘科学》2008年第5期78-80,共3页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(40371020)

摘　　要：基于元胞自动机模拟城市系统的复杂行为时,空间尺度是一个非常重要的概念,模型的模拟结果往往会随着输入数据的空间尺度变化而发生变化。然而,目前的元胞自动机城市增长模型大多没考虑数据的空间尺度特征,本文拟通过改变模型中输入数据的空间尺度来验证元胞自动机城市增长模型对尺度的敏感性及其空间尺度特征,并以长沙市为例进行实证研究。研究结果表明:元胞自动机城市增长模型只有在一定的尺度范围内才具有较高的模拟精度,并且模型对尺度具有一定的敏感性,因此为了使模型能够具有较高的模拟精度,并较好地反映城市形态特征,应认真选择模型中输入数据的空间尺度。An approach commonly used in geography and urban growth simulation is based on cellular automata theory and the GIS framework. However, the behaviour of cellular automaton （CA） models is affected by uncertainties arising from the scale of data sources used as model input. The scale effect of CA models has not been sufficiently addressed in the research literature. Taking the downtown areas of changsha city as study area, the objective of this study is to analyze the scale effect of a GIS-based CA urban growth model using input data of different scale. The study results show that the model managed to perform well and produce realistic urban form only up to specific range of scale. Thus, the selection of scale to represent urban system under consideration has to be undertaken with care, in order to ensure that the output produced maintains the overall accuracy of the model and morphology of urban areas.

关 键 词：元胞自动机 GIS 城市增长模拟 空间尺度 长沙 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]