Digital Elevation Model and orthophotographs of Greenland based on aerial photographs from 1978-1987 (G150 AERODEM) (NCEI Accession 0145405)

Here, we present a medium-resolution DEM and orthophotographs that consistently cover the entire surroundings and margins of the Greenland Ice Sheet 1978-1987. About 3,500 aerial photographs of Greenland are combined with field surveyed geodetic ground control to produce a 25 m gridded DEM and a 2 m black-and-white digital orthophotograph. Supporting data consist of a reliability mask and a photo footprint coverage with assigned recording dates. Through one internal and two external validation tests, this DEM shows an accuracy better than 10 m horizontally and 6 m vertically while the precision is better than 4 m.

本研究发布了一套可一致性覆盖1978年至1987年格陵兰冰盖全域周边及冰缘区域的中分辨率数字高程模型（Digital Elevation Model, DEM）与正射影像（Orthophotograph）数据集。
该数据集整合了约3500张格陵兰地区航空摄影影像与野外实测大地测量地面控制点，最终生成分辨率为25米的网格化数字高程模型，以及分辨率为2米的黑白数字正射影像。
配套辅助数据包含可靠性掩膜，以及标注了成像日期的影像覆盖幅面范围数据集。
通过1项内部验证与2项外部验证测试，本数字高程模型的水平定位准确度优于10米，垂直高程准确度优于6米，精密度优于4米。