基于多波段组合技术的土地利用/覆盖信息提取研究

Study on Extracting Land Use/Cover Information Based on Multiband Combination Technology

针对不同土地利用类型,选取最佳解译波段组合。在此基础上,提出分层提取的方法,并用此法对土地利用/覆盖信息进行了解译,同时进行了精度评价。结果表明:TM1,4,5组合为解译居民点和水域的最佳波段组合,TM3,4,5组合为解译耕地、林地和草地的最佳波段组合;与非监督分类及监督分类相比,监督分类和非监督分类结合分层提取的总体分类精度分别从25.3%、71.6%提高到85.5%。

The optimal band combinations were selected for interpretation of land use/cover. Based on this, the multilayer extrastion was presented. Land use/cover information is interpreted by using the method, at the same time the interpretation results are evaluated. The results show that TM3, 4, 5 is the optimal combination for classifying cultivated, forest and grassland, and that TM1,4, 5 is the optimal combination for classifying residential area and water body. Compared with the unsupervised classification and the supervised classification, the precision of muhiband combination information extraction is improved to 85.5 % from 25.3 %, 71.6 %, respectively.