An improved method of multi-base states with amendments on spatio-temporal data model

Seven kinds of existed spatio-temporal data models based on state with amendment were analyzed in this paper.Through several times amendment on the data model,some defects still existed.In this paper,the author proposed an improved method for multi-base states with amendments on spatio-temporal data model.The main idea of this method is to create index for the multi-base states.Comparing with exited methods,this method can save storage space and improve resuming speed of history.Moreover,there is no length limit of history.