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冰川长度是冰川变化研究中的重要参数.以青藏高原普若岗日冰原为研究对象,基于高分一号卫星遥感影像和数字高程模型数据,利用波段阈值法和目视解译相结合的方法提取冰川边界,综合利用冰川中心线法和冰川主流线法获取冰川长度,并在地理信息系统技术支持下进行了实现.结果表明,提取的冰川长度线与人工数字化的冰川长度线吻合度较好,精度可达97.9%,且执行效率较高.
The length of glacier is an important parameter in the study of glacier change.Based on the Puruogangri ice field on the Qinghai-Tibet Plateau, based on the high-score satellite imagery and digital elevation model data, a combination of band threshold method and visual interpretation The glacier boundary was extracted, and the length of glacier was obtained by using the glacier center line method and the mainstream glacier line method, and the result was realized under the support of GIS technology.The results showed that the coincidence degree between the extracted glacier length line and artificial digitized glacier length line was better , Accuracy up to 97.9%, and the implementation of higher efficiency.