The Reference Elevation Model of Antarctica
The Reference Elevation Model of Antarctica
复制标题
DOI：
10.5194/tc-13-665-2019
复制
发表时间：
2019-02-26
期刊：
影响因子：
5.2
通讯作者：
Morin, Paul
中科院分区：
文献类型：
--
作者：
Howat, Ian M.;Porter, Claire;Morin, Paul
南极洲参考高程模型（REMA）是第一个分辨率小于10米的大陆尺度数字高程模型（DEM）。REMA是从立体摄影测量与亚米分辨率光学，商业卫星图像。该图像的空间和辐射分辨率较高，能够在低对比度冰盖表面上进行高质量的表面提取。数字高程模型通过卫星雷达和激光测高仪进行登记，并进行镶嵌，以提供覆盖整个大陆近95%的连续表面。马赛克包括误差估计和时间戳，从而实现变化测量。典型的高程误差小于1米，与机载激光测高仪的比较验证了这一点。REMA为南极科学提供了一个强大的新资源，并为在大陆尺度上生成精确的高分辨率重复地形提供了概念证明。
The Reference Elevation Model of Antarctica (REMA) is the first continental-scale digital elevation model (DEM) at a resolution of less than 10 m. REMA is created from stereophotogrammetry with submeter resolution optical, commercial satellite imagery. The higher spatial and radiometric resolutions of this imagery enable high-quality surface extraction over the low-contrast ice sheet surface. The DEMs are registered to satellite radar and laser altimetry and are mosaicked to provide a continuous surface covering nearly 95% the entire continent. The mosaic includes an error estimate and a time stamp, enabling change measurement. Typical elevation errors are less than 1 m, as validated by the comparison to airborne laser altimetry. REMA provides a powerful new resource for Antarctic science and provides a proof of concept for generating accurate high-resolution repeat topography at continental scales.