Automobile GPS trajectory data compression method

The invention belongs to the technical field of computers, and particularly relates to an automobile GPS trajectory data compression method. The method comprises the following steps: step 1, acquiringGPS trajectory data of an automobile in real time, processing trajectory point data of the automobile, extracting trajectory point features, and identifying and storing key points in trajectory points; and step 2, performing meshing processing on the key points of the trajectory data, and matching the key points of the trajectory data to a road network with a grid index so that the trajectory isenabled to form the GPS trajectory of the automobile on the passing grid. The invention aims to perform hierarchical compression on the GPS trajectory data of the automobile, save storage resources and transmission bandwidth on the premise of fully reserving key trajectory points, and improve data analysis efficiency. 本发明属于计算机技术领域，更具体的，涉及一种汽车GPS轨迹数据压缩方法。它包括以下步骤，步骤一，实时获取汽车的GPS轨迹数据，对汽车的轨迹点数据进行处理，提取轨迹点特征，识别轨迹点中的关键点并保存；步骤二，对于轨