基于出租车轨迹数据的人口活动分析

摘要

It is difficult in data mining to discover the region of interest and dig out the people's daily travel features according to the trajectory data ,which gradually draws the attention of the people .At present , the taxi in most of the cities has been set with GPS ,which records trajectory data with rich information in time and space .To a certain extent ,it can reflect the travel of the urban population and dig out useful information by analyzing the trajectory data of the cab .T his paper mainly presents the positions of getting on or off the taxi and then data preprocessing ,map matching ,and integration .After all it can be done to analyze the region of interest with the weight and the trajectory data of the cab with map .%根据轨迹数据识别出人们感兴趣的区域，并且挖掘出人们的日常出行特性，作为数据挖掘的一个热点逐渐受到人们的重视。目前，绝大多数大城市的出租车上都安装有GPS ，其记录的轨迹数据在时间和空间上都包含丰富的信息，分析出租车的轨迹数据能在一定程度上反映城市人口的出行情况，挖掘有价值的信息。文中挖掘出租车轨迹数据中的乘客上下车的位置点数据，经过数据预处理、地图匹配以及整合后，对位置点进行有权重的热点区域分析，叠加到地图上进行人口活动分析。