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中文摘要：
对比研究了Shepard方法和连续曲率张力样条法及Kriging法在高程观测值稀疏和空缺区域中的插值效果,然后基于精化的ICESat数据集,利用连续曲率张力样条法建立了两极冰盖的格网时间序列模型,给出了极地冰盖高程的变化速率分布,并与卫星交叉点差值方法得到的相应值进行了对比分析。
英文摘要：
In this paper,the effect of the interpolation methods which include Shephard,continuous curvature splines in tension and Kriging method,has been contrasted in the area where height observations are sparse.Then by using continuous curvature splines in tension,time series of the polar ice sheets DEM was established based on the ICESat refined altimetry data set.Finally,speed distribution of polar ice sheets elevation change was given and was contrasted with the corresponding value obtained via cross-over point algorithm.
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