A Study on Spatio-temporal Data Model based on Feature and Event
基于双效机制的时空数据模型研究

The feature is an essential element that comprises spatio-temporal data information and the event is a fundamental factor that result in changing spatio-temporal data.Basing on analyzing several existing Spatio-temporal Data Model,this paper introduces a new Spatio-temporal Data Model based on feature and event double mechanisms.The character of spatio-temporal data changing is analyzed.And how to organize data,build relations between features and storage data in spatio-temporal database are also emphatically discussed.At last,a software package of dynamic land use information system based on above model and methods are introduced.Its running network environment is Windows NT Server 2000 and client is Windows workstation 4.0/2k/xp professional operation systems.Another important technology used in dynamic land use information system is a self-developed Attribute Database Engine(Dblink) combined with Spatial Database Engine(SDE).It is proven efficient in realizing the query and retrospect of the history information during system's operating.