A new landscape index for quantifying urban expansion using multi-temporal remotely sensed data
A new landscape index for quantifying urban expansion using multi-temporal remotely sensed data
复制标题
使用多时相遥感数据量化城市扩张的新景观指数
DOI：
10.1007/s10980-010-9454-5
复制
发表时间：
2010-05-01
影响因子：
5.2
通讯作者：
Ai, Bin
中科院分区：
文献类型：
--
作者：
Liu, Xiaoping;Li, Xia;Ai, Bin
景观指标或指数通常用于量化景观格局。然而，大多数这些指数一般侧重于简单的分析和描述的几何和空间属性的分类地图模式的表征。这些指数难以反映景观格局的时空动态变化，尤其是在使用多时相遥感数据时。本文提出了一种新的景观指数，景观扩展指数（LEI）的提出，以解决这些问题。与只能反映单个时间点空间特征的传统景观指数不同，LEI及其变体可以捕捉景观格局形成过程的信息。这使得人们可以量化两个或更多时间点的动态变化。这些建议的指数已被应用到测量的东莞市在广东省，中国，为1988-2006年期间的城市扩展。分析确定了三种城市增长类型，即，加密、扩边和外围。在每个时期的LEI的不同值的进一步分析揭示了一个一般的时间过渡阶段之间的扩散和合并的城市增长。这表明东莞城市发展的时空格局规律与城市发展理论的解释是一致的。
Landscape metrics or indices have been commonly used for quantifying landscape patterns. However, most of these indices are generally focused on simple analysis and description of the characterization of the geometric and spatial properties of categorical map patterns. These indices can hardly obtain the information about the spatio-temporal dynamic changes of landscape patterns, especially when multi-temporal remote sensing data are used. In this paper, a new landscape index, i.e., landscape expansion index (LEI), is proposed to solve such problems. In contrast with conventional landscape indices which are capable of reflecting the spatial characteristics for only one single time point, LEI and its variants can capture the information of the formation processes of a landscape pattern. This allows one to quantify the dynamic changes in two or more time points. These proposed indices have been applied to the measurement of the urban expansion of Dongguan in Guangdong province, China, for the period of 1988–2006. The analysis identifies three urban growth types, i.e., infilling, edge-expansion and outlying. A further analysis of different values of LEI in each period reveals a general temporal transition between phases of diffusion and coalescence in urban growth. This implies that the regularity in the spatiotemporal pattern of urban development in Dongguan, is consistent with the explanations according to urban development theories.