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冰川冻土 ›› 2019, Vol. 41 ›› Issue (1): 27-35.doi: 10.7522/j.issn.1000-0240.2019.0005

• 冰冻圈与全球变化 • 上一篇    

基于KH-9数据对青藏高原山地冰川DEM提取及精度评价——以普若岗日冰川和雅弄冰川为例

张鑫1,2, 周建民2, 刘志平1   

  1. 1. 中国矿业大学 环境与测绘学院, 江苏 徐州 221116;
    2. 中国科学院 遥感与数字地球研究所 中科院数字地球重点实验室, 北京 100094
  • 收稿日期:2018-04-28 修回日期:2018-10-08 发布日期:2019-03-16
  • 通讯作者: 周建民。E-mail:zhoujm@radi.ac.cn E-mail:zhoujm@radi.ac.cn
  • 作者简介:张鑫(1993-),男,重庆垫江人,2016年在中国矿业大学获学士学位,现为中国矿业大学在读硕士研究生,从事冰川变化及雷达遥感应用研究.E-mail:13952114109@163.com
  • 基金资助:
    国家自然科学基金面上项目(41471066);国家重点研发计划项目(2016YFB0501501;2016YFA0600304)资助

DEM extraction and precision evaluation of mountain glaciers in the Qianghai-Tibet Plateau based on KH-9 data: take the Purog Kangri Glacier and the Jiong Glacier as example

ZHANG Xin1,2, ZHOU Jianmin2, LIU Zhiping1   

  1. 1. School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China;
    2. Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Bejing 100094, China
  • Received:2018-04-28 Revised:2018-10-08 Published:2019-03-16

摘要: 针对青藏高原山地冰川区早期DEM数据缺乏、精度低、覆盖范围小等问题,以普若岗日冰川和雅弄冰川为例,利用解密的早期高分辨率间谍卫星KH-9立体像对,建立了基于KH-9数据的山地冰川DEM提取技术流程,并以ICESat GLAS高程数据为基准对提取的DEM进行了精度评价和精度影响分析。结果表明:无论是在普若岗日冰川区还是雅弄冰川区,所获取的DEM精度均完全满足估算山地冰川长时间尺度物质平衡的精度要求。KH-9数据具有空间分辨率高,地面覆盖范围广,成像时间较早(1971-1980年)等特点,可为山地冰川物质平衡研究提供很好的基础数据源。

关键词: 山地冰川, KH-9立体像对, 数字高程模型(DEM), ICESat GLAS

Abstract: Early on the Qianghai-Tibet Plateau mountain glacier area, there was lack of DEM data. At that time, many problems had troubled, such as low precision and small coverage. Now, taking the Purog Kangri Glacier and the Jiong Glacier as cases, using the declassified early high-resolution spy satellites KH-9 stereo image pairs, the technical process of DEM extraction of mountain glaciers based on KH-9 data was established, and the accuracy evaluation and precision impact analysis of the extracted DEM were conducted based on ICESat GLAS elevation data. The evaluation results show that: the precision of DEM obtained from this research is quite satisfied for its precision in long-term mass balance of mountain glacier, whatever for the Purog Kangri or for the Jiong Glacier. The KH-9 data has the characteristics of high spatial resolution, wide surface coverage and able to get the early images (1971-1980), which can provide good basic data for studying mountain glacier mass balance.

Key words: mountain glaciers, KH-9 stereo images, DEM, ICESat GLAS

中图分类号: 

  • P343.6