高速公路网异构GIS-T信息共享的本体模型

针对中国高速公路网内交通地理信息系统(GIS-T) 在信息表达上相互异构的问题, 通过分析异构根源提出了基于本体的GIS-T信息共享方案, 按照抽象拓扑、几何构件、线性参照、附加设施与动态数据的交通信息组织模式, 建立了高速公路网本体(FNO) 模型。以西安市周边的局部高速公路网为例, 分析了FNO对交通信息的一致性表达方式。分析结果表明: 高速公路网内所有GIS-T对FNO语义的理解相同, 对交通信息的表达具有一致认知, 确保交通信息的跨GIS-T共享。可见, 该本体模型能够提高中国高速公路网内异构GIS-T的互操作能力, 更好地支撑上层的交通信息管理与集成共享等应用。

Ontology model of information sharing for heterogeneous GIS-T in freeway network

In regard to the heterogeneous problem of GIS-T information representation in Chinese freeway network, an ontology-based solution for information sharing in GIS-T was proposed by studying the reasons of heterogeneity. A freeway network ontology (FNO) model was set up with traffic information units as abstract topology, geometrical components, linear reference system, attached facilities and dynamic data. The consistent representation of transport information with FNO was explained in the case study of suburban freeway network surrounding Xi'an. Analysis result shows that all GIS-Ts have the common understanding of transport information according to the consistent semantics implied from FNO, and better perform transport information sharing. So FNO model is capable of increasing the interoperability of heterogeneous GIS-T, and promotes the upper applications such as transport information management, integrating and sharing.