抄録
A country-wide Integrated Geographic Information System (IGIS) is very useful in providing good access to essential geographic information, and making sonud decision. The primary objective of such a system is to ensure that users of spatial data should acquire consistent datasets to meet their requirements, even though the data is collected and maintained by different authorities. In this paper, we analyse the relations among map information in a country-wide GIS, and address a Multi-scale/Multi-theme (M2) map information model for manipulating country-wide integrated maps of different scales for different themes. This information model is powerful to integrate various scales of maps uniformly and possesses advanced extensibility. We give the representation of road network in the model, and evaluate our model with a prototype system.
