基于QuickBird影像的郑州市城区景观格局评价

以2005年8月QuickBird卫星遥感数据解译的郑州市城区土地利用类型和城市绿地覆盖景观类型图为基础,利用ArcView和Fragstats软件,对全城区及不同功能区土地利用景观、城市绿地覆盖景观指数进行分析。结果表明,郑州市城区景观格局主要表现为城市绿地景观,面积占总面积的35.51%,未利用地景观面积最小,只占到0.33%。城市绿地覆盖在空间形态上接近圆形,平均面积小、景观破碎化程度高。工业用地和居住区用地空间形态接近长方形。城区东北部和西南区域土地利用表现为以道路为骨架的格网状空间结构。景观格局水平分布表现出明显的区域差异,城区西北区域景观异质最高,东部城市绿地覆盖景面积较西部多,存在少数斑块控制整个景观的特点。

Landscape patterns of Zhengzhou urban area: An assessment based on QuickBird imagery

In this paper, the spatial patterns of different land use types in Zhengzhou urban area were analyzed at landscape level and class level, based on the relevant maps interpreted by high resolution QuickBird imagery in August 2005 and with the aid of GIS software ArcView and landscape pattern analysis software Fragstats. The results showed that greenbelt had the largest area, occupying 35.51%, while unused land had the smallest one, accounting for 0.33% of the total. Spatially, greenbelt was round in shape and with small and fragmental patches, residential and industrial lands were rectangle, and road system was grid-shaped. There was an evident difference in the horizontal distribution of the landscape patterns. The landscape heterogeneity was the largest in the southwest, greenbelt was more in the east than in the west, and the whole urban landscape was characterized by large patches.