GIS语义共享的实质及其实现途径

GIS技术下的地理信息共享表现为 GIS数据共享 ,在研究 GIS数据共享时 ,是以最终实现地理信息共享为目的的。为达到这一目的 ,首先必须解决数据本身的共享问题 ,再次要解决数据所表达的语义的共享问题 ,其中包括从数据中读取语义的过程 ,即语义翻译 ,以及所读取的语义与应用目的之间的融合过程 (主要是要解决语义冲突问题 ) ,即语义融合。为了实现 GIS语义共享 ,除要采用一定的技术实现数据本身的共享外 ,还必须选择合适的空间概念及其逻辑表达方法实现语义的共享 ,本文提出采用基于地理要素的空间概念并采用 GIS语义数据模型加以描述可以实现 GIS的语义共享。

The Essence of GIS Semantics Sharing and Its Realization

GIS data sharing is a way of geographic information sharing in the GIS stage. The realization of geographic information sharing by GIS technologies needs two processes. One is for sharing data themselves and the other is for sharing semantics. Semantics translation, which is recognizing meaning from the shared data and semantics fusion, whose focus is on semantics conflictness constitute the process of GIS semantics sharing. To realize the GIS semantics sharing, the paper has proposed that the spatial concepts and its logic representation must be studied besides the technological issue related to the data sharing must be tackled first. The paper concluded that the geographic-feature-based(GF) spatial concept can suit the need of GIS semantics sharing while the GIS semantic data model is the way to logically represent the concepts.