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在房地产及其相关的领域里涉及到大量的空间数据和非空间数据，如何有效地将它们连接起来，实现查询和定位是该领域的一个重要且亟需解决的问题。论述了门牌号的概念、特点、类型及特性，包括门牌号的“一对一”和“一对多”的特点和时间性。论证了其定位和查询的作用，并探讨了实现的途径。最后总结了门牌号在不同类型的房地产 MIS(Management Information System)和 DSS(Decision Support System)中的作用，从而为空间数据库和非空间数据库的连接提供了有效的手段。
Involving a large amount of spatial data and non-spatial data in the real estate and related fields, how to connect them effectively and to realize the query and location is an important and urgent problem in this field. Discusses the concept, characteristics, types and characteristics of house number, including the characteristics and timeliness of “one to one” and “one to many” of house number. Demonstrated its role in positioning and inquiries, and explored ways to achieve. Finally, it summarizes the role of house number in different types of real estate MIS (Management Information System) and DSS (Decision Support System), which provides an effective means for the connection of spatial database and non-spatial database.