顾及时态地块的土地划拨时空数据组织

Organizing Spatio temporal Data of Land Subdivision with Temporal Land Parcels

以土地划拨为例，分析了地块分割、合并、复杂划拨和属性变化的特点，在此基础上构造了一个顾及时态对象的时空模型。该模型用非第一范式和两层时间标记组织地块的时空数据，并借助于活动地块表、不活动地块表和后向指针索引表建立了每个时态地块与其时态邻域地块之间的链接关系。

In order to model and represent the spatio temporal processs of land subdivision, a spatio temporal data model concerning temporal objects is designed in this paper. With the help of three tables: active land parcel, non active land parcel and future index, and spatio temporal data of land parcels are maintained in the land related database and can be accessed by the users even after the land parcels completed their functions. In addition, time is added at two levels: at tuple level and at attribute level.