福州城市扩展的遥感动态监测

Dynamic Monitoring of the Urban Expansion in Fuzhou of SE China Using Remote Sensing Technology

本文以1996年9月6日和2003年5月29日两个时相的LandsatTM/ETM+卫星影像为数据源,结合相应时相的SPOT卫星数据,通过压缩数据维的方式,提取了福建省福州市的城市建筑用地信息,分析了从1996年至2003年间福州市的城市扩展动态变化情况及原因,并将此变化与福州市城市总体规划(1995￣2010)相比较,研究结果认为,福州城市扩展变化与规划是相吻合的。

Two Landsat TM/ETM＋ images of 1996/9/6 and 2003/5/29, as well as two SPOT images, have been used for this study. To reveal urban expansion areas in Fuzhou of SE China from 1996 to 2003, the original 7-band TM/ETM＋ image was compressed into a 3-band image using the band-dimension compression technique. The 3 new bands were derived from three thematic indices, which are Soil Adjusted Vegetation Index （SAVI）, Modified Normalized Differences Water Index （MNDWI）, and Normalized Differences Built-up Index （NDBI）. A supervised classification was carried out on this new 3-band image and the urban built-up lands were extracted from the classified maps. The results show that the expanded areas are generally coordinated with the Fuzhou City＇s Planning （1995～2010）.