中国典型区域GLC2009数据的精度评价

为研究GLC2009在中国地区数据的分类精度,以中国典型区域为研究内容,选择空间分辨率为30 m的中国TM影像为参考数据,利用混淆矩阵方法,从空间一致性和面积数量精度两方面对全球土地覆盖数据GLC2009产品进行精度检验.结果表明：GLC2009在中国总体精度较低,其中华东区域的分类精度最高,Kappa系数达到0.77;西北和华南区域的分类精度次之;东北区域的精度则最低,Kappa系数仅为0.02.该结果为地表层发展过程研究提供了参考依据.

Accuracy evaluation of globe land cover products GLC2009 in typical regions in China

This paper is a study on the classification accuracy of GLC2009 in China area.The study is targeted at typical Chinese areas and performs an accuracy test of the data products produced by global land-cover （The GLC2009） in terms of the spatial consistency and area number accuracy,drawing on the reference data selected from China TM images with the spatial resolution of 30 m and using the confusion matrix method.The result suggests that GLC2009 performs with a lower overall accuracy in China,such as occurs when it exhibits the highest classification accuracy in the East China region and Kappa coefficient of up to 0.77 ; a higher classification accuracy in the northwest and southern part of china ; and the lowest classification accuracy in the northeast region and the Kappa coefficient of just 0.02.The result offers a reliable basis for studying the development process of surface.