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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Use of a three-dimensional laser scanner to digitally capture the topography of sand dunes in high spatial resolution
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Use of a three-dimensional laser scanner to digitally capture the topography of sand dunes in high spatial resolution

机译：使用三维激光扫描仪以高空间分辨率数字捕获沙丘的地形

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摘要

We herein report the results of a field study that was designed to test the feasibility of using ground-based LIDAR to map the topography of a sand dune in high spatial resolution. A portable Cyrax 2500 three-dimensional (3D) laser scanner was used to digitally capture the topography of a barchan, roughly 4 m tall and 50 m long, located in the White Sands National Monument, New Mexico. We performed eleven scans around the barchan and obtained the elevation relative to the inter-dune flat at roughly 1/4 million points on the dune surface. The elevation point data were then interpolated to yield a continuous surface model of the dune topography with c. 10 cm spatial resolution and c. 6 mm position accuracy. The results from this field study clearly demonstrate the potential of ground-based LIDAR as a mapping tool for use in aeolian research and other earth science applications. The 3D surface model of the dune can describe the morphology with hitherto unprecedented detail. Moreover, the surface of the dune is mapped with a minimum of foot traffic on the dune itself.
机译：我们在此报告了一项野外研究的结果，该野外研究旨在测试使用地面LIDAR在高空间分辨率下绘制沙丘地形的可行性。便携式Cyrax 2500三维（3D）激光扫描仪用于以数字方式捕获位于新墨西哥州白沙国家保护区的大约4 m高，50 m长的巴坎的地形。我们在Barchan周围进行了11次扫描，并获得了相对于沙丘间平面在沙丘表面上大约1/4百万点的高程。然后对高程点数据进行插值，以得到c的沙丘地形的连续表面模型。 10厘米的空间分辨率和c。 6毫米位置精度。这项现场研究的结果清楚地证明了地面LIDAR作为制图工具在风沙研究和其他地球科学应用中的潜力。沙丘的3D表面模型可以用前所未有的细节描述形态。此外，沙丘的表面在沙丘自身上以最小的脚步流量进行映射。

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