袁修孝, 高宇, 邹小容. GPS辅助空中三角测量在低空航测大比例尺地形测图中的应用[J]. 武汉大学学报 ( 信息科学版), 2012, 37(11): 1289-1293.
引用本文: 袁修孝, 高宇, 邹小容. GPS辅助空中三角测量在低空航测大比例尺地形测图中的应用[J]. 武汉大学学报 ( 信息科学版), 2012, 37(11): 1289-1293.
YUAN Xiuxiao, GAO Yu, ZOU Xiaorong. Application of GPS-supported Aerotriangulation in Large Scale Topographic Mapping Based on Low-altitude Photogrammetry[J]. Geomatics and Information Science of Wuhan University, 2012, 37(11): 1289-1293.
Citation: YUAN Xiuxiao, GAO Yu, ZOU Xiaorong. Application of GPS-supported Aerotriangulation in Large Scale Topographic Mapping Based on Low-altitude Photogrammetry[J]. Geomatics and Information Science of Wuhan University, 2012, 37(11): 1289-1293.

GPS辅助空中三角测量在低空航测大比例尺地形测图中的应用

Application of GPS-supported Aerotriangulation in Large Scale Topographic Mapping Based on Low-altitude Photogrammetry

  • 摘要: 介绍了自行研发的GPS辅助轻型飞机低空航摄系统的基本工作原理,通过对宜城测区10cm GSD航摄影像的地形测图试验表明,在106km2测区的四角布设4个平高地面控制点,其GPS辅助光束法区域网平差与密周边布点光束法区域网平差的结果完全一致。利用该加密成果测绘地形图,地物点的实际精度平面优于±20cm,高程优于±15cm,完全满足平地1∶500航测地形测图的精度要求。但与常规航测成图方法相比,摄影测量加密可节省90%以上的像片控制测量工作量,测图周期缩短了1/3,而且突破了大比例尺航测地形测图必须全野外布点的现行航空摄影测量规范限制。这充分说明GPS辅助空中三角测量应用于低空航测大比例尺地形测图是可行的,且具有无可比拟的优越性。

     

    Abstract: We describe briefly the basic principle of GPS-supported low-altitude photographic system developed by the authors.A set of actual aerial images with airborne GPS data,at a ground sample distance of 10 cm,were taken from Yicheng site in China by our system.The empirical results have verified that the accuracy of the GPS-supported bundle block adjustment with 4 XYZ ground control points around the corners of the block area is very close to that of the conventional self-calibration bundle block adjustment with additional parameters,which leads to more than 90% reduction in field survey for ground control points.And the object coordinate accuracies of the stereo models reconstructed using the photogrammetric points obtained by GPS-supported bundle block adjustment are better than ±20 cm for planimetry and ±15 cm for elevation,which meets the specification of topographic mapping at 1∶500 scale flat.This shows the ample applicability and the economic benefit of GPS-supported bundle block adjustment in low-altitude photogrammetry.

     

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