基于航空遥感的大比例尺景观格局分析--以大麻镇为例

在利用现时高分辨率航片获取大比例尺、翔实的土地利用现状图的基础上,结合研究区的特点进行了景观分类,选择和计算了景观多样性指数和景观优势度、分离度、破碎度指数及斑块分形维数等景观格局指数,对浙江省桐乡市大麻镇进行了小尺度、大比例尺(1∶2000)景观格局分析。结果表明,景观多样性指数与最大多样性指数有很大的差异;研究区内的各景观类型所占比例差异较大,优势度数值高,耕地成为起支配作用的优势景观,如果将耕地、园地、林地和其他农用地当成一种景观类型,则研究区内整体景观生态特征明显由农业景观所支配;其他农用地景观类型的景观破碎度最高,受人为干扰和破坏最为严重,因近年来土地整理的实施,耕地景观以面积大而且形状较规则的斑块广泛分布于研究区中;居民点及独立工矿景观的斑块几何形状趋近于简单且规则,但受人为干扰程度大。

Analysis of landscape pattern based on high-resolution aerial remote sensing

Landscape ecology deals with the biological,physical,and social causes and consequences of spatial variation.New spatial tools such as geographical information systems(GIS) and remote sensing have given geographers and ecologists unprecedented capacity to classity land cover patterns and understand spatial heterogeneity and landscape structure.This technology has simplified landscape structure characterization through measures referred to as landscape pattern metrics.The study area was divided into 9 landscape types,making a reference to the land-use classification of Zhejiang Province for interim.The analysis metrics of landscape pattern included landscape diversity,landscape dominance,landscape fragmentation,landscape isolation,patch fractal dimension and patch density.The result showed that landscape in study area were dominantly the farmland.The landscape type(other agricultural land) was the most isolated and influenced by human activities to a high extent.