Research on the efficiency of querying historical data with the spatio-time data integration method

One of the main purposes of spatio-temporal modeling is to replay and reproduce states at different historical moments. The spatio-temporal data integration is the key to building the model because it exerts a direct influence on the mode and efficiency of querying data in the database. In fact, in the previous study, the author has proposed a time-based spatio-temporal data integration method and proved that the efficiency of querying historical data with the integration method is higher than that with the widely used integration method regarding time as an attribute from the theoretical level. In the study, from the application level, the author, using real cadastral parcel alternation data and the numerical fitting method, makes a contrast analysis of these two methods in the query efficiency based on two situations of historical data query respectively and real query time data, and also further verifies the conclusion from the theoretical study. (C) 2010 Elsevier Ltd. All rights reserved.