On Spatio-Temporal Data Access Methods in ORDBMS
Wu Lun · Geography and Geo-Information Science · 2006
Spatio-temporal data model and spatio-temporal data access methods are the two key technologies in spatio-temporal databases.In this paper,the Snapshot Model was used to represent and store spatio-temporal data.Then a review and comparison of existing spatio-temporal data access methods were given.In order to speed the query processing,an improved PP-TPR tree was adopted basing on the former analysis of various kinds of spatio-temporal indexing techniques.This kind of improved PP-TPR tree supports various kinds of spatio-temporal query including prediction and history query.All these techniques cited above were implemented in the world's most popular open-source ORDBMS,namely PostgreSQL.The experimental results come out to indicate that the research work in this paper is really a good attempt in spatio-temporal data access method fields.