作　　者： ; ; ; ;

机构地区： 中国科学院地理科学与资源研究所

出　　处： 《地球信息科学》 2009年第4期461-467,共7页

摘　　要： GIS描述的现实世界永远处于不断变化之中,但传统GIS却只能以静态的方式表现[1],随着GIS的广泛应用,越来越多的应用领域,需要GIS来管理空间信息的动态变化。为更有效地定义和描述空间变化,并实现其动态模拟,本研究采用面向对象的思想对空间过程中的核心要素建模,对传统的空间数据模型进行扩展,引入动态图形对象模型、时空事件模型、事件处理引擎等概念,基于SuperMap GIS组件平台进行模型验证;通过合理的资源调配、高效时空索引和动态缓存机制来提高空间变化过程动态可视化的效率。本研究针对通用的空间过程进行底层建模,实现事件驱动的空间过程模拟机制。这不仅简化了上层应用开发的工作量,而且优化了基础模型层的结构,同时引入了事件驱动引擎、事件索引、动态地图缓存等机制,较好地提升空间过程模拟的效果。 The real cally. However, GIS world GIS describes is changing continuously, while traditional GIS can only describe it staff- has greatly extended its application fields, most of which contain dynamic spatial information that should be managed by GIS. In order to effectively define and dynamically simulate spatial ods have been adopted to model core elements of spatial process, which is a modification and variation, OOB meth- extension of tradition- al spatial data model. Meanwhile, several concepts such as dynamic graphic object model, spatial-temporal event model and event engine have been imported and realized based on SuperMap GIS component platform. Additional- ly, visual efficiency of dynamic spatial variation has been improved by reasonable resource arrangement, high effec- tive spatial-temporal query and dynamic cache mechanism. Spatial variation simulation can be essentially concerned as the description of spatial object at different temporal status driven by a certain event. Common spatial variation has been modeled at bottom level to achieve event driven simulating mechanism, which simplifies the development of application level. The effect of spatial variation simulation has also been improved since the structural optimiza- tion of basic model level through event driven engine, event index and dynamic map cache mechanism.

关 键 词： 地理信息系统 动态 事件驱动 模拟

领　　域： [自动化与计算机技术] [自动化与计算机技术] [矿业工程]