This paper presents the knowledge-based image database system (ISDBS) developed inour laboratory and proposes principles of the system design of a knowledge-based data model,a new data structure and the knowledge representation language IDL applicable to the comput-er-aided regional planning. ISDBS was applied successfully to the land planning of AnsaiCounty on the loess plateau and the forest resource management of Songjianghe territory inNortheast China.
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