摘要
通过对以往时空数据建模过程记录的不足分析,提出利用时间Petri网和层次扩展的子过程对时空过程进行建模,能显式表达时空数据以及时空变化过程,由位置/状态和变迁连接时空过程。并以土地变更业务为例详细分析整个过程,认为此建模过程能很好的表达现实世界的时空过程。
Through analysis for several representative spatio-temporal data modeling, the paper points out any limitation about these method of modeling. These models are difficult to depict and express the spatio-temporal semantics. Then the paper brings forward one method that modeling for spatio-temporal process is based on Time PetriNet and sub-process of level-extend way. This can depict and express spatio-temporal data and its transition process. In Petri-Net, Position/state and transition link those look like discrete spatio-temporal process. Finally, the paper gave a particular description of land changing. And the method of modeling can express the spatio-temporal process of world.
出处
《测绘学报》
EI
CSCD
北大核心
2005年第3期239-245,共7页
Acta Geodaetica et Cartographica Sinica
基金
国家973资助项目(2002CB410810)
国家自然科学基金资助项目(40301038)
关键词
PETRI网
时空数据
状态变化
建模
Petri net
spatio-temporal data
state transition
modeling
