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以渭河下游河流沿线区域为研究区,通过对2002年ETM+影像的各波段光谱特征、相关系数矩阵、最佳指数OIF、修正植被指数RNDVI、主成分变换进行分析后,认为第一主成分分量PC1、RNDVI和Band4为最优波段组合。利用非监督的ISODATA和监督分类相结合的方法对研究区进行土地利用/覆盖分类后,得到的总体分类精度为90.098 7%,Kappa系数为0.884 5,说明该研究方法获得的分类精度较高,步骤简便且实用性强,能极大地提取遥感分类信息。 更多还原

【Abstract】 Taking the catchment area along Weihe River in Shaanxi Province as a study area,by analyzing spectral characteristics of every band,correlation coefficient matrix among bands,optimum index,revised vegetation index and principal components transformation on ETM+ image in 2002,optimum band combinations were fixed on PC1,RNDVI and Band4.After classified to study area on land use and cover using unsupervised and supervised classification,the total accuracy of classification was 90.098 7%,and the Kap... 更多还原