随着地理信息科学的发展,人们对多类型目标跨尺度空间表达的需求越来越大,而现有的多尺度模型大多属于领域建模,适用范围有限,需要针对通用的地理空间对象多尺度模型开展研究.基于本体理论对地理空间对象的多尺度特性进行分析,总结了3类多尺度综合算子;从概念、逻辑和物理3个层次设计了地理空间对象多尺度模型,探讨了基本概念、推理逻辑和数据库设计;并通过实验验证了多尺度模型的尺度综合推理过程.该模型充分考虑了多尺度的本体特性,与具体的对象类型、表达方式和综合方法无关,同时支持本体工具的形式化表达,具有较高的通用性和实用价值.%There are much more requests for cross-scale spatial expression of multiple types of targets with the development of geographic information science.However,the existing geospatial scale models mostly belong to special domains with limited application scopes.Therefore it is urgent for the research of common geospatial multi-scale models.The multi-scale characteristics and the integration process of geospatial objects were analyzed based on ontology,as well as three types of integrating operators.A geospatial multi-scale model was designed from conceptual,logical and physical levels,accordingly with the discussion of the basic concepts,reasoning logic and database design.The scale integration reasoning process of the multi-scale model was verified by experiments at last.The ontology-based multi-scale model of geospatial objects took into account the main characteristics of multi-scale and was independent of the specific object type,expression and integration methods,while supporting formal expression by ontology software.The model was of high versatility and practical value.
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