Study of GIS Conceptual Model Design for GIS Data Sharing
面向GIS数据共享的概念模型设计研究

The main challenge in GIS data sharing is semantics sharing of the data. Of the main basis for data sharing including technological development, data standardization and legal basis, the standardization is the most direct one. The design of one standard conceptual data model, which is a data sharing related fundamental task, is the most important strategy to make a precise semantics sharing. The authors' perception of standard conceptual model design is intended to find a suitable, systematic set of rules to ensure the safety of data sharing. The model designed must provide abstract concepts that can be interfaced for data sharing and therefore the concepts must be geographic concepts instead of spatial concepts. The abstract mechanism must also be designed in the process of modeling. The GIS semantic data modeling approach has been used as a tool to design the needed conceptual model. As a basic geographic concept, geographic feature has been used as a semantic object.