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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Extraction of Multiple Building Heights Using ICESat/GLAS Full-Waveform Data Assisted by Optical Imagery
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Extraction of Multiple Building Heights Using ICESat/GLAS Full-Waveform Data Assisted by Optical Imagery

机译：利用光学图像辅助的ICESat / GLAS全波形数据提取多个建筑物高度

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摘要

Although the Ice, Cloud, and land Elevation Satellite/Geoscience Laser Altimetry System (ICESat/GLAS) has been used for urban monitoring, however, previous studies focused on extracting the maximum building height within the footprint. In fact, the full-waveform recording of GLAS data makes it possible to extract multiple building heights. However, the uncertainty of the spatial distribution and reflectance creates considerable challenges for the fine inversion of multiple building heights within the footprint. In this letter, we proposed an inversion method of multiple building heights using GLAS data assisted by QuickBird imagery. First, the GLAS waveform and the auxiliary optical imagery were processed to extract some spectral, horizontal, and vertical information as the prior knowledge of the inversion model. Then, the multiple building heights were inversed from the optimal simulated waveform based on the 3-D geometric optical and radiative transfer (GORT) model. The building heights measured by airborne LiDAR were used to validate the inversed building heights. The results demonstrated that the proposed inversion method achieved the building height estimation accurately and precisely (R-2 = 0.971, rRMSE = 13.2%, and n = 430). This letter may shed some light on extracting multiple-level heights within the footprint using satellite LiDAR full-waveform data.
机译：尽管冰，云和陆地高程卫星/地球科学激光测高仪系统（ICESat / GLAS）已用于城市监测，但是，先前的研究集中在提取占地面积内的最大建筑物高度。实际上，GLAS数据的全波形记录使提取多个建筑物高度成为可能。然而，空间分布和反射率的不确定性给足迹内的多个建筑物高度的精细反转带来了巨大的挑战。在这封信中，我们提出了利用QuickBird影像辅助的GLAS数据对多种建筑物高度进行反演的方法。首先，对GLAS波形和辅助光学图像进行处理，以提取一些光谱，水平和垂直信息，作为反演模型的先验知识。然后，根据3D几何光学和辐射传递（GORT）模型，从最佳模拟波形中逆转多个建筑物高度。机载LiDAR测量的建筑物高度用于验证倒置的建筑物高度。结果表明，所提出的反演方法能够准确，准确地实现建筑物高度估算（R-2 = 0.971，rRMSE = 13.2％，n = 430）。这封信可能会说明如何使用卫星LiDAR全波形数据提取覆盖区内的多个高度。

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