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基于数字高程模型的城市街区起伏度研究——以南京老城区为例

发表时间:2011-11-15  浏览量:1105  下载量:343
全部作者: 杨昕,贺文慧,葛姗姗
作者单位: 南京师范大学虚拟地理环境教育部重点实验室
摘 要: 借鉴城市规划与管理中的分区思想,以城市街区作为基本统计和分析单元。首先统计反映城市三维起伏特征的最大高度、平均高度、高度标准差等信息;进一步设计反映城市表面起伏的错落度、占空度等起伏度指标,并实现这6个指标的空间计算,统一构成对城市三维空间形态起伏特征的刻画。研究结果显示:南京市老城区宏观上具有中间高四周低的形态特征,具体表现为两点、一线、三片区的特点。此外,相关性分析显示:街区面积和街区数量对此6个量化指标的计算没有影响。其中,最大高度、高度标准差及起伏范围3个指标之间的相关性较强,当城市位于平坦地区时,这三者可在一定程度上相互替代。
关 键 词: 地理学;城市数字高程模型;城市街区;起伏度;南京市老城区
Title: Research on relief amplitude in urban area based on urban digital elevation model: a case study of Nanjing old city
Author: YANG Xin, HE Wenhui, GE Shanshan
Organization: Key Laboratory of Virtual Geographic Environment, Ministry of Education, Nanjing Normal University
Abstract: Drawing on the idea of city district in urban planning and management, city blocks are considered as the basic statistics and analysis unit. Firstly statistic indicator, such as the max height, mean height and the standard deviation of height in each block are derived to reflect the undulation characters of urban material morphology. Then three quantified indicator such as otherness, expansibility and amplitude are proposed for exploring the morphology variation both within and outside city blocks. All of six indicators form a whole description to relief amplitude of 3d-urban morphology. The experiment results show that the surface height of Nanjing old city shows a macro trend of low around and high in the middle. And it can be described in detail as “two cores, a linear uplift and other three zones”. Moreover, the analysis of correlation indicates that the six quantified parameters have no correlation with block area and block number. The indicators of max height, the standard deviation of height and amplitude have a strong correlation and can be substituted for each other when city located in completely flat area.
Key words: geography; urban digital elevation model; city block; relief amplitude; Nanjing old city
发表期数: 2011年11月第21期
引用格式: 杨昕,贺文慧,葛姗姗. 基于数字高程模型的城市街区起伏度研究——以南京老城区为例[J]. 中国科技论文在线精品论文,2011,4(21):1946-1953.
 
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