基于CBERS影像的土地覆盖动态监测方法研究

准确地从遥感影像通过分类方法获取土地覆盖信息是一项基础性的重要课题.在建立土地覆盖分类体系的基础上,对株洲市1999年、2003年和2007年3个时相CBERS星CCD数据进行监督分类,提取土地覆盖信息,并分析其动态变化过程.结果表明:在我国中部丘陵地区,利用多时相CBERS星CCD数据开展土地覆盖变化遥感动态监测取得了较理想的效果;1999年至2007年间,株洲市林地、水体和城镇居民点面积所占比重逐渐提高,林地和城镇居民点面积增幅较大,增速呈放缓趋势,从而造成农用地和其他土地面积减少,这可为株洲市合理利用土地资源和地区可持续发展提供一定的科学依据.

Methods of Land-cover Dynamic Monitoring Base on CBERS Data

Obtaining land-cover information by classification method from remote sensing images was a basic andimportant project. The CBERS images of Zhuzhou City in 1999, 2003 and 2007 were classified with supervisedclassification methods based on the establishment of land-cover classification system, the land-cover information wasextracted and its dynamic changes were analyzed. The results indicated that: it was effective to use CCD data ofCBERS to monitor land-cover dynamic information by remote sensing in hilly areas in the middle of China. From1999 to 2007, the p roportion of forest land and water body and construction land were gradually increased inZhuzhou City, resulting in the decrease of farm land and other land. The increases of forest land and constructionland was sharp but the increasing rate became slightly. In conclusion, the results could p rovide some scientificevidence for the government of Zhuzhou City to make decision in land resources use and thesustainable development.