HIGH PERFORMANCE AND EFFICIENT MULTI-SCALE TRAJECTORY RETRIEVAL

摘要

A system, method and computer program product for retrieving trajectory data from huge datasets. In the method, there is received, at a processor device, a user query including a request for displaying trajectory data at a user device. From the user query, a query type and a current map visualization scale setting (mapscale) for visualizing the trajectory data on the user device display is determined. Then, responsive to a user query type and the determined mapscale setting, a corresponding reference level is selected. Based on the selected reference level, there is accessed from a memory storage device a data set of compressed trajectory data. This compressed trajectory data set is communicated to the user device, for presentation on the user device display. In one aspect, the system and method is adaptive, enabling storage and retrieval of trajectory data according to various degrees of visualization or granularity.

主权项

1. A method for trajectory data retrieval comprising:
receiving, at a processor device, a user query including a request for displaying trajectory data at a user device; determining, from said user query, a query type and a current map visualization scale setting (mapscale) for visualizing the trajectory data on the user device display; selecting a reference level responsive to a user query type and the determined mapscale setting; accessing, from a memory storage device, a data set of compressed trajectory data according to said selected reference level; communicating said compressed trajectory data set to said user device, for presentation on the user device display.