摘要
冰川的监测一直是冰川学研究的重要内容,2008年对天山东段博格达峰南坡的黑沟8号冰川末端进行了地面多基线数字摄影测量,获取了该冰川末端的影像,以及与之相配套的控制信息.在Lensphoto多基线数字摄影测量系统中,测得了冰川末端的0.11km2 DEM数据.采用同期测量的GPS数据检验得知,摄影测量所得DEM数据在高程上的平均误差为1.92m,标准偏差为3.47m.地面旋转多基线数字摄影测量是一种非常有效的冰川测量手段,可以在典型冰川测量和冰川重要部位(例如冰川末端、冰崖等)的测量中发挥作用.
Ground photogrammetry is a traditional and important glacier surveying method. Because of satellite remote sensing technology arising, glacier ground photogrammetry was immersed in trough for a time. However, with the increase in demand of high precision topographic data and the digital photogrammetry technology evolving, ground photogrammetry again becomes an effective means of glacier surveying. In August 2008, a ground multi-baseline photogramdmetry test was carried out on the terminus of Heigou Glacier No. 8 in the south slopes of the Mt. Bogda, eastern Tianshan Mountains. Using dozens of images ohtained from four camera stations and the corre- sponding ground control information, by the assis- tant of Lensphoto digital photogrammetric system and non-metric digital camera, a DEM was con- structed with an area of 0.11 km2 and 1 m × 1 m resolution. RTK-GPS measurements were used to assess the accuracy of the photogrammetry DEM; The DEM shows an average error of 1.92 m and a standard deviation of 3.47 m. The precision is suf- ficient for most glaciological studies; it＇s a benefi- cial try to make a high resolution digital elevation model within a limited area in China.
出处
《冰川冻土》
CSCD
北大核心
2012年第5期1184-1189,共6页
Journal of Glaciology and Geocryology
基金
中国科学院知识创新工程重要方向项目(KZCX2-YW-GJ04)资助
