Land Use Change and Information Extraction of Rural Residential Land Based on Corona KH-4B Imagery

Rural residential land use is a major indicator on Land use/cover change (LUCC) research, particularly in China, where the land cover has changed greatly over the past 40 years. In this paper, a case study was taken to extract the spatial distribution feature of rural residential land in west area of Hangzhou, China, using Corona KH-4B (1969) satellite imagery declassified by US. An accurate assessment was performed compared the result with cadastral data in the same time. The land use status information of rural residential land was extracted by using QuickBird(2011) imagery and the 40-year land use change was analyzed based on geographic information systems (GIS). The results show that the patch precision was about 94%, area precision was about 93%; the study area of rural residential land reduced to 186.1hm² in 2011 from 202.7hm² in 1969, the percentage of waters dropped 16.1%, with the area 1417.8hm² in 1969 sharply declining to 364.8hm² in 2011.