维护数据更新前后的空间拓扑一致性与属性逻辑一致性是数据更新过程中必须考虑的问题.由于地类图斑的属性面积与图形面积在数据库存储的精度不同,四舍五入后造成数据更新前后属性面积统计值存在差异.本文在分析地理实体变化类型后提出了数据更新过程中地类图斑的6种变化类型,针对分割与综合变化2种具有代表性的变化类型,设计与实现了不同的维护面积一致性的方法,并在实际应用系统中得到有效验证.%Maintaining the spatial topology consistency and attributes logic consistency should be considered in the data update process. Due to the different precision of attribute area and geometrical area stored in the database, a statistical difference exists between the rounded data that was updated and the original data in attribute area. Based on the analysis of geographicial entity change types, this essay proposes six kinds of land parcel change type in data update process, designes and implements different solutions to solve the area differences for the land parcel division change type and complex change type, which were verified in the practical application.
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