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分析了Voronoi图在表达邻近关系方面的特性,提出了用Voronoi方法为MapInfo建立动态邻近关系并扩展拓扑功能的方法。 相似文献
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从地理信息服务到地理知识服务:基本问题与发展路径 总被引:1,自引:0,他引:1
从地理信息服务升级到地理知识服务,既是一种必然的发展趋势,也是信息爆炸困境下的迫切现实需求.本文辨析了地理知识服务的内涵、与地理信息服务的联系及区别,以及其对形式化知识表示与智能化知识处理的要求.在分析传统人工智能技术的局限性和人工智能技术新近突破性进展的基础上,指出最新发展水平的人工智能技术为发展地理知识服务提供了令人乐观的认知智能基础.从地理知识服务的时空本质特性的角度,指出了发展地理知识服务面临的空间表示知识化、空间分析认知化、知识服务情境化3方面的主要问题,进而提出了地理知识服务的分级发展策略和推进路径. 相似文献
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Local spatial interaction between neighborhood land-use categories (i.e. neighborhood interaction) is an important factor which affects urban land-use change patterns. Therefore,it is a key component in cellular automata (CA)-based urban geosimulation models towards the simulation and forecast of urban land-use changes. Purpose of this paper is to interpret the similarities and differences of the characteristics of neighborhood interaction in urban land-use changes of different metropolitan areas in Japan for providing empirical materials to understand the mechanism of urban land-use changes and construct urban geosimulation models. Characteristics of neighborhood interaction in urban land-use changes of three metropolitan areas in Japan,i.e. Tokyo,Osaka,and Nagoya,were compared using such aids as the neighborhood interaction model and similarity measure function. As a result,urban land-use in the three metropolitan areas was found to have had similar structure and patterns during the study period. Characteristics of neighborhood interaction in urban land-use changes are quite different from land-use categories,meaning that the mechanism of urban land-use changes comparatively differs among land-use categories. Characteristics of neighborhood interaction reveal the effect of spatial autocorrelation in the spatial process of urban land-use changes in the three metropolitan areas,which correspond with the characteristics of agglomeration of urban land-use allocation in Japan. Neighborhood interaction amidst urban land-use changes between the three metropolitan areas generally showed similar characteristics. The regressed neighborhood interaction coefficients in the models may represent the general characteristics of neighborhood effect on urban land-use changes in the cities of Japan. The results provide very significant materials for exploring the mechanism of urban land-use changes and the construction of universal urban geosimulation models which may be applied to any city in Japan. 相似文献
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城市建设管理部门实现数字办公需要图一体化的办公管理软件支持。传统的图办公软件是根据具体应用目的进行设计的.业务运作模型搭建起来后不易修改.给维护带来很大不便。本介绍了部分基于CASE技术的图办公软件设计方法.它可以有效解决以上问题。 相似文献
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图文办公系统集MIS、GIS与OA为一体,目前广泛应用于城市规划、国土管理等领域,然而由于GIS本身的独特性与复杂性,图文一体化问题一直是图文办公系统建设的难题之一。本文从数据、界面和应用三个层面对图文办公系统的图文一体化方法进行了研究,应该对该类系统的分析设计与开发具有一定的借鉴作用。 相似文献