Monitoring and Analyzing the Environmental Characteristics of Beijing Olympic Venues with Multi-source Remote Sensing Data and GIS
北京2008奥运赛场环境特征的GIS系统分析

31 Olympic venues,the road cycling field and the Olympic park of Beijing Olympic Games changed the urban land surface.In order to study the environmental characteristics and the influence of these buildings,several indexes,such as,normalized difference building index(NDBI),normalized difference water index(NDWI),seasonal day and night land surface temperature(LST)and normalized difference vegetation index(NDVI)were analyzed with different spatial and temporal resolution multi-source remote sensing data and GIS,which is helpful to achieve the goal of Green Olympic Games.LANDSAT TM5 remote sensing data with 30m spatial resolution and 16 days temporal resolution was used to extract the information about the NDBI and NDWI,which are not sensitive to time.EOS MODIS remote sensing products with 250m/1km spatial resolution were used to extract the information about the day/night LST and NDVI,which are sensitive to time.The study area for each venue was defined from its center to 1 km outside with the buffer zone analysis of GIS.By classing the Olympic venues into different types based on the building time,the geographical location and the open air states,the indexes of different kinds of venues were analyzed with their mean values and the standard variance.The results lead to the following conclusions:(1)The environmental characteristics of the 31 Olympic venues are different with the difference of their building time,geographical locations and the open air states.It is necessary to take all these factors into consideration in landscaping and the programming of the activities in these venues.(2)The environment characteristics of the road cycling field are close to that of the Olympic park of Beijing Olympic Games.They both present high building index,negative water index and high day/night land surface temperature in summer and autumn.And it is better to add some water body around them to increase the environment quality.