A study On Spatio-temporal Access Methods In Spatial Databases

Spatiotemporal database deals with moving objects that change their locations over time. Generally, moving objects report their locations obtained via location-aware devices to a spatiotemporal database server. The server can store all updates from the moving objects so that it will be capable of answering queries about the past. Some applications need to know current locations of moving objects only. In this case, the server may only store the present status of the moving objects. To predict future positions of moving objects, the spatiotemporal database server may need to store additional information, viz., the objects' velocities. In this study the indexing structures BB*, Optimal BB*, Parameterized OBB and Space based OBB* are analyzed in the way of tree creation, methodology of indexing, the process of updation and the process of migration are studied.