Research on the Integration of GIS-Based Digital Valley System

Songxin Shi, X. Ye, Zhaoxia Dong, Huamin Zhou
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引用次数: 5

Abstract

Geographic information systems (GIS) have become increasingly valuable tools in hydrology & hydrodynamic modeling and have been used in the evaluation of integrative development and utilization of water resource in many ways. These may relate to the coupling of hydrology & hydrodynamic models and GIS system, collaborative work of heterogenous systems and the integration of distributed spatial database. Typically these data and the processes have been undertaken on separate platforms, and this paper describes the development of such a system combining GIS-based modeling of hydro logical analysis and cascade hydroelectric station optional dispatching. Specifically it reports the framework, system design, function design, correlative techniques for GIS-based modeling and analysis in digital valley system integration. A three-tier architecture was introduced as framework in the system integration process, spatial database middleware ArcSDE integrate with Oracle to realize the integrative management of spatial and property database, a COM-based GIS component MapObjects was used for the GIS client-tier development, and different specific models are developed as COM-based component, The integrated system realizes both GIS and specific functions in hydrological analysis and cascade hydroelectric station optional dispatching, the function and data integration are both realized in some degree. This integrated system, not only realizes the basic GIS functions such as space query, statistics and analysis, but also supplies a tool for visualization of the hydrology & hydrodynamic analysis and simulation result. Furthermore, the COM-based framework makes it convenient to extend system function flexible by developing new specific models as a component
基于gis的数字山谷系统集成研究
地理信息系统(GIS)已成为水文学和水动力建模中越来越有价值的工具,并在水资源综合开发利用评价中得到了广泛的应用。这可能涉及到水文水动力模型与GIS系统的耦合、异构系统的协同工作以及分布式空间数据库的集成。这些数据和过程通常是在单独的平台上进行的,本文描述了基于gis的水文逻辑分析建模与梯级水电站可选调度相结合的系统开发。具体介绍了数字山谷系统集成中基于gis的建模与分析的框架、系统设计、功能设计及相关技术。在系统集成过程中引入三层体系结构作为框架,将空间数据库中间件ArcSDE与Oracle集成,实现空间数据库与属性数据库的一体化管理,使用基于com的GIS组件MapObjects进行GIS客户端层开发,并作为基于com的组件开发不同的具体模型。综合系统在水文分析和梯级水电站可选调度中既实现了GIS功能,又实现了具体功能,在一定程度上实现了功能和数据的集成。该综合系统不仅实现了空间查询、统计和分析等GIS基本功能,而且为水文水动力分析和模拟结果的可视化提供了工具。此外,基于com的框架可以方便地通过开发新的特定模型作为组件来扩展系统功能的灵活性
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