城市管网数据模型与网络逻辑拓扑关系

City Pipe-Network Data Model and Network Topologic Relations

城市市政网络系统是城市地理信息的重要组成部分,基于ArcGIS地理信息系统平台,运用Catalog,Geodatabase中 间件技术,构造十堰市燃气管网数据库,将GIS外部的关系数据库管理系统(RGBMS)与燃气管网调度管理系统(DMS)有 机地集成在基于GIS空间数据的可视化管理平台上,实现了对管线几何关系数据、逻辑关系数据和实时动态监测数据的统 一管理.通过管线要素类和要素集建立市政管网空间数据的几何拓扑关系,通过Catalog和Geodatabase建立管网的逻辑拓 扑规则和准确表征专业管道物理网络的各种连接关系及其流动系统的动力学关系,在实时监控网络数据接口的支持下,通 过SKADA和RTU系统获取管道流体的物理特征实时数据,为燃气调度和事故预警提供动态监测空间位置信息和管道维 护检修的决策支持信息.系统集成基于C/S和B/S体系结构,具有实际应用价值.

A municipal network system is an important part of a city's geographic information system. Based on the GIS platform - ArcGIS and applying the technology of middleware - Catalog and Geodatabase, the authors design the Shiyan City gas-pipe database. At the same time, the authors integrate the RGBMS outside the GIS and the gas-pipe DMS on a platform that is based on the visual management of GIS spatial data, and successfully realize the unified management of geometric relational data, logic relational data and dynamically-inspected data. The geometric topology relation of the municipal pipe-network spatial data was established using the feature class and the feature dataset of the pipe-line, and the logic topology rule was established using Catalog and the Geodatabase. It can represent exactly all kinds of linked relations held by the industrial pipe's physical network and dynamic flow system. Supported by the data interface of real-time inspection and by the system of SKADA and RTU, the physical feature data of the hydro-data of the pipeline can be obtained. It provides the dynamic and inspected spatial information for the DMS that is offered for gas control and accident forecast. Based on the frame of C/S and B/S, the system is integrated and holds practical application values.