The Greenland Ice Mapping Project (GIMP) land classification and surface elevation data sets
The Greenland Ice Mapping Project (GIMP) land classification and surface elevation data sets
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DOI：
10.5194/tc-8-1509-2014
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发表时间：
2014-01-01
期刊：
影响因子：
5.2
通讯作者：
Smith, B. E.
中科院分区：
文献类型：
--
作者：
Howat, I. M.;Negrete, A.;Smith, B. E.
作为格陵兰冰川测绘项目（GIMP）的一部分，我们已经为整个冰盖和周边地区制作了三个地理空间数据集。这些是(1)完整的15m分辨率图像拼接，(2)覆盖和无冰地形分类掩模，也以15m分辨率发布，以及(3)完整的高度计注册数字高程模型，发布在30 m。该图像拼接是由1999年至2002年间获得的Landsat-7和RADARSAT-1图像组合而成。图像中的每个像素都带有采集日期和地理配准误差，以便于变化检测。然后使用这种马赛克手工制作完整的冰雪覆盖和无冰土地分类面具。最后，我们使用卫星测高和立体摄影测量数字高程模型（DEM）来增强格陵兰岛现有的DEM，大大提高了冰缘和外围的分辨率和精度。
As part of the Greenland Ice Mapping Project (GIMP) we have produced three geospatial data sets for the entire ice sheet and periphery. These are (1) a complete, 15m resolution image mosaic, (2) ice-covered and ice-free terrain classification masks, also posted to 15m resolution, and (3) a complete, altimeter-registered digital elevation model posted at 30 m. The image mosaic was created from a combination of Landsat-7 and RADARSAT-1 imagery acquired between 1999 and 2002. Each pixel in the image is stamped with the acquisition date and geo-registration error to facilitate change detection. This mosaic was then used to manually produce complete ice-covered and ice-free land classification masks. Finally, we used satellite altimetry and stereo-photogrammetric digital elevation models (DEMs) to enhance an existing DEM for Greenland, substantially improving resolution and accuracy over the ice margin and periphery.