基于固定翼无人机摄影测量高分辨率DSM建模的地理形态学可用性探讨  

The Research on Geomorphological Application Basing on the High-Resolution Digital Surface Modeling with Fixed-Wing UAV-based Photogrammetry

作　　者：徐彦怀[1] 

机构地区：[1]国家测绘局陕西测绘产品质量监督检验站,陕西西安710054

出　　处：《北京测绘》2015年第2期108-111,共4页Beijing Surveying and Mapping

摘　　要：高分辨率多时相数字地形数据对于地理形态学研究和监测有着非常重要的作用,但是获取地理生态学的地形数据困难且价格很高。无人飞行器(UAV)为摄影测量并建立数字表面模型(DSM)以及数字正射影像(DOM)提供了一个可靠和良好的平台。在本研究中,我们利用固定翼无人机进行航空摄影测量,并获得初步成果。利用相关成果,我们分析了广西北部农业聚水区的地形可靠性。经过连续4航次低空数码摄影测量,获得了3cm分辨率的影像,建立了12cm分辨率的数字地表模型。并在原先建模地区的子区域,通过超低空飞行建立了7cm空间分辨率的数字地表模型。所有数据均用于可视化环境的小型到大型地面塌崩分析。最终结果显示,3cm分辨率影像可以有效支持小型比例尺的地理形态学研究。但是作为水文学或水文生态学的小型水流河道踪迹研究,仍然需要更高分辨率的影像和数字地表模型。研究主要成果显示了利用UAV研究地形生态学的潜在价值。The Research on geomorphological application basing on the High-Resolution Digital Surface Modeling with Fixed-Wing UAV-based Photogrammetry High-resolution and multi-temporal digital terrain data is a potential valuable source for geomorphological research and monitoring studies,yet often difficult and costly to obtain.Unmanned Aerial Vehicle（UAV）provids a promising and flexible platform for the acquisition of multi-temporal digital surface models（DSM）and orthorectified air photos.In this research we demonstrate preliminary results of UAV-based photogrammetry with a fixed-wing aircraft,and we assess the quality of derived DSM and terrain properties in a geomorphologically active agricultural catchment near Pamplona,N-Spain.In 4sequential flights 200 ha was captured at 3cm ground sampling distance（GSD-185 mflight altitude）with which a 12 cm DSM was created.Subsequently,a single flight at 90 maltitude enabled creating a DSM of 7cm spatial resolution of a subarea.Both datasets have been compared by visualizing small rills and a superficial landslide.Results suggest that 3cm GSD was found sufficient for identifying small-scale geomorphological activity.Yet,small rills and tractor tracks which are potentially interesting for hydrological or hydrogeomorphological studies required smaller GSD.The preliminary results show high potential of the utilization of UAVs in different domains of geomorphological research.

关 键 词：UAV 地理形态学 DSM 

分 类 号：P231[天文地球—摄影测量与遥感]