Glaciers of Bhutan 2000

Digital polygon data of Glaciers of Bhutan in 2000. This dataset is created using Landsat TM and ETM+, imageries of 2000. The glacier outlines was derived semi-automatically using object-based image classification (OBIC ) method separately for clean ice and debris cover and further editing and validation was done carefully by draping over the high resolution images from Google Earth.

2000年不丹冰川数字化多边形数据集。本数据集依托2000年的陆地卫星专题制图仪（Landsat TM）与增强型专题制图仪（ETM+）影像构建。冰川轮廓采用基于对象的影像分类（Object-Based Image Classification, OBIC）方法，分别针对洁净冰区与冰碛覆盖区进行半自动提取；后续通过叠加谷歌地球（Google Earth）的高分辨率影像开展了精细化的编辑与验证工作。