An Online GPS Trajectory Data Compression Method Based on Motion State Change

Aiming to the problem of insufficient consideration to the cumulative error and offset which online Global Positioning System (GPS) trajectory data compression based on motion state change and the key point insufficient evaluation of online GPS trajectory data compression based on the offset calculation, an online compression of GPS trajectory data based on motion state change named Synchronous Euclidean Distance (SED) Limited Thresholds Algorithm (SLTA) was proposed. This algorithm used steering angle value and speed change value to evaluate information of trajectory point. At the same time, SLTA introduced the SED to limit offset of trajectory point. So SLTA could reach better information retention. The experiment results show that the trajectory compression ratio can reach about 50%. Compared with Thresholds Algorithm (TA), the average SED error of SLTA can be negligible. For other trajectory data compression algorithms, SLTA’s average angel error is minimum. SLTA can effectively do online GPS trajectory data compression.