基于无人机的大比例尺测图技术研究

Research on Large-Scale Mapping Technology Based on UAV

随着无人机硬件技术和高精度GNSS定位技术的发展,将高精度GNSS定位模块应用到无人机上,结合GNSS辅助空中三角测量技术,不但有效减少像控点的数量甚至免像控,且可大大提高无人机航测的精度。该文结合某区1∶500测图任务,根据作业环境和设备情况,设计了消费级四旋翼无人机的航空摄影测量方案,并且布设足够的控制点提高绝对定向精度,保证数字产品精度的可靠性,并开展了关键测图环节精度分析,验证测图方案的有效性和实用性。

With the development of UAV hardware technology and high-precision GNSS positioning technology,applying high-precision GNSS positioning module to UAV,combined with GNSS assisted aerial triangulation technology,can not only effectively reduce the number of image control points or even eliminate image control,but also greatly improve the accuracy of UAV aerial survey.Based on the 1:500 mapping task in a certain area,according to the operating environment and equipment conditions,this paper designs an aerial photogrammetric scheme for a consumer class four rotor UAV,and arranges enough control points to improve the absolute orientation accuracy,ensure the reliability of the accuracy of digital products,and carries out accuracy analysis of key mapping links to verify the effectiveness and practicality of the mapping scheme.