摘要
目前商用地理信息系统 (GIS)尚不能完整地表示地理实体的时态信息和时空关系 ,且缺乏时空分析和时空动态建模能力 ,这已成为 GIS界的一个共识 ,而未来 GIS在各应用领域的深入发展 ,以及在实现“数字地球”战略过程中 ,都要求发展新的时空分析和建模方法 .由于细胞自动机 (Cellular Automata)是一种“自下而上”的动态模拟建模框架 ,并具有模拟复杂系统时空演化过程的能力 ,因而将标准 CA模型的四元组进行扩展 ,以满足 GIS环境下时空动态分析的要求 ,进而建立了土地持续利用动态模拟模型 。
The functionality of spatio temporal analysis and modeling is a drive for Geographical Information Systems(GIS) to further applications in various applied fields and digital earth plan. However, currently commercial GIS systems lack those capabilities for spatio temporal distribution, prediction, and simulation of spatio temporal processes. So more effective and powerful modeling methods need to be developed. Cellular automata model (CA) provides GIS with a bottom to top spatio temporal modeling thought, which is composed of a fourfold: cells, states, neighbors and rules. The simplicity and flexibility make CA able to simulate a variety of behaviors of complex systems. In order to meet the needs of spatio temporal modeling under GIS environment, the standard CA is extended to GIS context about the concept of cells, system time and transition rules. Based on these extensions, several predominant factors affecting urban evolution are simulated on a virtual city. Finally, to take baotou city as an example, integrated GIS with ECA, the evolution of urban expansion and sustainable land use were simulated. The initial time is 1992 when land use data were acquired by aerial photography. The change data collected by differential GPS are used for model calibration. The appropriate extents of baotou city development in 1998, 2008 and 2020 are simulated. The result of 1998 is consistent with the surveyed data with GPS. Thus, the established model can be used as a virtual lab for decision support in urban planning and land policy making.
出处
《中国图象图形学报（A辑）》
CSCD
2000年第12期1012-1018,共7页
Journal of Image and Graphics
基金
国家"九五"科技攻关项目(96-b02-07)
关键词
时空动态分析
细胞自动机
转换规则
城市扩展
Spatio temporal analysis
Cellular automata
Transition rule
Urban expansion
