Development of an Antarctic digital elevation model by integrating cartographic and remotely sensed data: A geographic information system based approach
Development of an Antarctic digital elevation model by integrating cartographic and remotely sensed data: A geographic information system based approach
复制标题
DOI：
10.1029/1999jb900224
复制
发表时间：
1999-10
影响因子：
--
通讯作者：
Hongxing Liu;K. Jezek;Biyan Li
中科院分区：
文献类型：
--
作者：
Hongxing Liu;K. Jezek;Biyan Li
我们提出了一个高分辨率的数字高程模型（DEM）的南极。它是在地理信息系统环境中建立的，综合了各种来源的现有最佳地形数据。广泛的基于GIS的错误检测和校正操作，确保我们的DEM是免费的粗差。针对不同类型的源数据精心设计的插值算法和表面形态信息的结合保留并增强了源数据中存在的精细表面结构。对不利边缘效应的有效控制以及在数据合并中使用Hermite混合权重函数最大限度地减少了不同类型数据之间的不连续性，从而在整个南极洲生成无缝且地形一致的DEM。这种新的DEM提供了特殊的地形细节，并代表了一个显着的改善，在水平分辨率和垂直精度比早期，大陆规模的renditions，特别是在山区和沿海地区。其水平分辨率在崎岖山区为200米，在沿海地区为400米，在内陆地区约为5公里。DEM的垂直精度估计在崎岖的山区约为100-130米，优于2米的冰架，优于15米的内部冰盖，约35米的陡峭的冰盖周边。南极DEM可从作者处获得。
We present a high-resolution digital elevation model (DEM) of the Antarctic. It was created in a geographic information system (GIS) environment by integrating the best available topographic data from a variety of sources. Extensive GIS-based error detection and correction operations ensured that our DEM is free of gross errors. The carefully designed interpolation algorithms for different types of source data and incorporation of surface morphologic information preserved and enhanced the fine surface structures present in the source data. The effective control of adverse edge effects and the use of the Hermite blending weight function in data merging minimized the discontinuities between different types of data, leading to a seamless and topographically consistent DEM throughout the Antarctic. This new DEM provides exceptional topographical details and represents a substantial improvement in horizontal resolution and vertical accuracy over the earlier, continental-scale renditions, particularly in mountainous and coastal regions. It has a horizontal resolution of 200 m over the rugged mountains, 400 m in the coastal regions, and approximately 5 km in the interior. The vertical accuracy of the DEM is estimated at about 100–130 m over the rugged mountainous area, better than 2 m for the ice shelves, better than 15 m for the interior ice sheet, and about 35 m for the steeper ice sheet perimeter. The Antarctic DEM can be obtained from the authors.