基于事件的土地利用时空数据模型研究

先分析了 Peuquet(1995 )提出的基于事件的栅格时态数据模型 ESTDM,对该模型采用栅格结构所致的多属性描述局限进行了讨论 ,并提出了解决方案 :通过模型的属性索引访问“外部”的属性数据 .据此 ,结合土地利用的时空特点 ,设计了基于事件的土地利用时空数据模型 EL STDM及相应的时空数据库方案 ,并对土地利用变化的时空分析进行了探讨 .在此基础上 ,设计实现了土地利用变化时态 GIS原型系统 .试验结果表明 ,该时空数据模型满足了土地变化调查成果的管理和查询需求 ,对进一步的土地分析给予了较好的尝试 .

Study on Event-based Spatio-temporal Data Model for Land Use Change

In this paper, the Event-based Spatio-temporal Data Model (ESTDM) put forward by D.J. Peuquet in 1995 was analyzed, and its inability of representing multi-attributes is discussed so that a resolution is reached: to introduce "attribute table and index" into the model to link the ESTDM with "external" attributes. Then, one new spatio-temporal data model is designed for land use change and the corresponded spatio-temporal database as well. In addition, a spatio-temporal database is designed for the data model. Based on the new model, a prototype of temporal GIS for land use is designed and implemented. Then the prototype system is tested with land use change data of Jinan city. The experiment indicated that the proposed new model is in right point for the spatio-temporal change of land use since it is specially aimed at land use change, which qualifies the model to hold both high academic and practical value.