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Data Base Dependent Aggregation Operators in a Map Oriented Information System

机译:面向地图的信息系统中基于数据库的相关聚合算子

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Aspects of a map oriented information system are described. Aggregation operators, intended for subqueries used in more complex data base queries that demand great computational efforts are outlined. The operators are the relationships between the objects of the data base on which the operators should operate. The practical aspects concerning the building of a data base for test purposes is outlined and the complete map information system is reviewed.

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