摘要
对冰川监测中常用的冰川信息提取方法应用于崇测冰川信息的提取中进行了试验并对各自的优劣进行了综合评价。研究发现：目视解译方法具有普适性,可提取多类冰川,但费时费力;其他常用方法如比值法、雪盖指数法、非监督分类与监督分类法等,提取效果明显但都不具有通适性。新产生的面向对象的多尺度分割提取方法虽在一定程度上提高了冰川提取精度,但冰雪区分仍是识别的难点。对西昆仑山脉的崇测冰川信息进行提取,得到崇测冰川地区精确的冰川边界。结果表明：该冰川总体上呈消退趋势,1994~2011年这17年里冰川总面积从511.253 km2减少到487.352 km2,面积变化率为4.6%,年均减少0.27%。冰舌面积由45.371 km2增加到78.833 km2,也验证了全球变暖导致冰川消融这一科学结论。
The information extraction method used in Glacier monitoring is used in the extraction of the information of the glacier, and the advantages and disadvantages are comprehensively evaluated. Study found that： visual interpretation methods for the translation of although laborious, but the application in the extraction of any type of glacier; ratio method, snow cover index method, supervised classification and unsupervised classification results obvious but has not enough general applicability. The new method of multi - scale segmentation, which is produced by the new method, improves the accuracy of the glacier extraction to a certain extent, but it is still a difficult problem to distinguish the ice and snow. The information of the Chongee glaciers in the West Kunlun Mountain is extracted, and the accurate glacial boundary is obtained. The results showed that： the overall trend of the Chongce glacier retreat, in 1994 - 2011, the total area of glaciers from 511. 253 to 487. 352 km2 in 17 years, the area rate of change was 4.6% , with an average annual decrease of 0.27%. The glacier area increased from 45. 371 km2 to 78. 833 km2. It verified the global wanning the scientific conclu- sion of glacier ablation.
出处
《测绘与空间地理信息》
2016年第11期175-178,共4页
Geomatics & Spatial Information Technology
关键词
冰川提取
面向对象
冰川边界
崇测冰川
glacier extraction
object oriented
glacier boundary
Chongce glacier
