燃气GIS地理网络模型构建技术研究

在分析城市燃气地理网络的特点、构成要素、各要素之间关系的基础上,将燃气地理网络抽象为物理网络、几何网络和逻辑网络三个层次。介绍了三个层次网络模型的特点与本质联系,提出了燃气网络构造的拓扑规则(边-边规则、边-结点规则等),给出了燃气网络构建的流程和实现框架。并以十堰市燃气GIS的网络模型为例,说明了燃气地理网络模型的构建技术与应用。

Study of Geo-network modeling of Gas GIS

Network analysis is the core technology of gas GIS.Although gas GIS was widely used in gas administration,there was little study in the network modeling.The gas GIS was just confined to static data management.The complex function(blast pipeline analysis,tracing analysis,influencing range analysis,etc.) has not been realized for the weakness of network modeling.We studied the characteristic,basic constituent part,relationship between each part of gas geographical network,summarized three levels:physical network,geometric network and logical network.The specialties and essential contact of each network as well as construction topology rule(edge-edge rule,edge-junction rule,etc.) of gas network were also explained.We gave the steps of construction gas network and realized framework.As an example,Shiyan(a city in Hubei province,China) Gas GIS was cited,which exemplified how to construct gas network and realize advanced network analysis.