基于GIS的广州城市时间地图研究

A Study on Urban Temporal Map of Guangzhou Based on GIS

时间地图是利用时间作为量算单位,根据城市外缘各点与城市中心的时间距离长短差异描绘出的等时线地图。利用时间地图,可以清晰、直观地表现出城市中心与城市周边地区之间由于采用不同的交通工具而显示出不同的时间关系。文中借助GIS手段,以广州市的交通为例,用最常用的3种交通工具(公共汽车、出租车、地铁)对城市的时间距离分别进行量算,并制作出广州城市时间地图。通过对时间地图信息直接的读取与分析,指出时间地图研究的前景与利用价值。

According to the difference of the temporal distance between the surroundings and the city centre, an isochronal temporal map can be drawn, where time is taken as a measuring unit. For different vehicles, the time relationship between the surroundings and city centre can be expressed clearly and directly by using temporal map. In the paper, transportation of Guangzhou City is taken as an example to be studied by means of GIS, a temporal map of Guangzhou is made by measuring the temporal distance separately with three common means of transportation such as bus, taxi and subway. The results show that： unimpeded degree of the urban traffic vary in different urban areas; and daily trips at different time and by different vehicles have close correlativity with the spending time; many traffic lines show traffic jams, and time delay is serious; subway network system still doesn＇t come into being. So the study on temporal map has a wide prospect. It can be used to the daily trips for inhabitants, and provide guide and reference for the transportation departments while constituting urban transportation planning.