Potential accessibility and its spatial pattern in Guangzhou-Hong Kong Urban Corridor
不同指标下的穗港城市走廊潜在通达性及其空间格局

From the perspective of potential accessibility,according to the transport condition among the regions,this paper builds up the network model,and calculates,forecasts and analyses the potential spatial accessibility pattern in Guangzhou-Hong Kong Urban Corridor with integrated GIS tools,based on analyzing the current accessibility data in the landway transport network in Guangzhou-Hong Kong Urban Corridor,using the shortest time distance index and the weighted average travel time index.The latter index uses population in the future as its weighted factor. As a result,the potential accessibility of landway transport network in Guangzhou-Hong Kong Urban Corridor presents a concentric circle spatial pattern either the shortest time distance index or the weighted average travel time index, and the inner accessibility level is better.The accessibility level goes worse from the center to the periphery.The author transforms the results of these two indices into accessibility coefficients for the purpose of comparison.The results show that the accessibility status of the south corridor is improved and the north one is weakened taking the potential population factor into account.Finally,the potential accessibility level is compared with the current one.It is suggested that the former is more balanced that the latter,the overall accessibility level is improved,and the lower the original accessibility level is,the more it improved.