UBII:一种协同经济、社会与人类活动的城市边界识别指数

UBII: an Urban Boundary Identification Index for Synergy Economy,Society and Human Activities

城市边界识别是测度城市规模的关键,也是研究城市问题的基础。本文在借鉴了国内外已有的研究基础上提出了一种新的综合经济因素、社会因素、人类活动强度和范围的城市边界识别指数UBII(Urban boundary i-dentification index),即用经济密度、人口密度、夜光强度和出行时间4种参数构建指数来识别城市边界并提取城市建成区范围。本文将对此指数和城市边界识别方法进行介绍,并选取中国湖北省作为实验区,讨论了UBII的合理阈值,进行了不同方法下的城市边界识别对比分析以及不同发展阶段城市的适用性分析。结果表明:使用UBII进行城市边界识别具有较高的准确性,识别结果更为客观;对于不同发展阶段的城市均有一定的适用性,识别结果更为精确。

Urban boundary recognition is the key to measure the scale of a city,and is also the basis of the study of urban problems.This paper proposes a new urban boundary recognition index UBII,which combines economic factors,social factors,intensity of human activities and range of activities,which is based on the existing studies at home and abroad,that is,economic density,population density and population density.The index of luminous intensity and travel time is used to identify the urban boundary and to extract the range of the urban built-up area.This paper introduces the index and the method of urban boundary recognition.The reasonable threshold of UBII is discussed in Hubei province of China,and the comparative analysis of urban boundary recognition and the applicability analysis of different development stages are carried out under different methods.The results show that UBII is more accurate and more objective in urban boundary recognition,and it is more accurate for cities in different stages of development.