Accuracy Validation of Airborne Laser Scanning DTM Using the Ground Control Points
Accuracy Validation of Airborne Laser Scanning DTM Using the Ground Control Points
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使用地面控制点的机载激光扫描 DTM 精度验证
DOI：
10.4287/jsprs.43.4_13
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Tamotsu Nakajima
中科院分区：
文献类型：
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作者：
Hiroshi P. Sato;T. Sekiguchi;Kaoru Orimo;Tamotsu Nakajima
机载激光扫描已成为生成数字地形模型 (DTM) 的既定工具。为了获得植被区域的 DTM，应从数字表面模型 (DSM) 中滤除树冠上的激光反射点。过滤有自动和手动执行，但很难获得完美的DTM，特别是在植被丘陵或山区。在本研究中，通过遍历测量的地面控制点验证了 2001 年 12 月和 2002 年冬季获得的“DTM”的准确性。结果表明，裸露平坦区和植被坡区的均方根误差（RMSE）分别约为0.15m和0.4-0.6m。此外，通过 RMSE 检验穿透率，该穿透率由 DSM 中的反射点数除以 DTM 中的点数来定义。发现渗透率越大，RMSE 越小。
Airborne laser scanning has become an established tool for generating digital terrain model (DTM) . To obtain DTM in the vegetative area, laser-reflected points on the canopies should be filtered out from digital surface model (DSM) . The filtering is automatically and manually performed, but it is difficult to obtain the perfect DTM, especially in the vegetative hills or mountain areas. In this study accuracy of the“DTM”, which was obtained in the winter of December 2001 and 2002, is validated with ground control points, surveyed by traversing. As a result, root mean square errors (RMSE) are about 0.15m and 0.4-0.6m in the bare flat areas and vegetative slope areas, respectively. Moreover, penetration ratio which is defined by the number of reflected points in DSM divided by the number in DTM, was examined with the RMSE. It was found that the more the penetration ratio increases, the smaller the RMSE is.