Taking the characteristic of estuarine and coastal data into consideration, we introduce geodatabase model, the third generation geographic data model, to the implementation of a database for the estuarine and coastal GIS(ECGIS).

The Study and Implementation of the MDBM;

The paper briefly introduces developmental course of geographical data model and elaborates geodatabase and its characteristics.

It took spatial cognition theory and information communication theory,geographical spatial conception,geographical data model and standardization of geographical information for essential contents,and expatiated each theory finally.

On the base of the theories about storing and querying of enormous geographical data,the paper introduces the geographical data model which satisfies the requirements of storing and managing enormous,multi-data source and multi-scale geographical data effectively by using the technologies of object-relation data model and three client/server layers.

Geodatabase and Its Application Scheme for Forest Resources Surveys;

Application of cursor in Geodatabase;

Watershed Data Model Design Based on Geodatabase Model;

This paper focuses on the research and application of the automation of geographic database cartographical generalization,in order to resolve the problems in the production of fundamental geographic database cartographical generalization.