无人机低空数字摄影测量成图精度实证研究

Practical Research on Mapping Precision of UAV-based on the Low Attitude Digital Photogrammetry

无人机低空数字摄影测量技术已在诸多领域得到了应用,但其数据产品(主要包括DLG和DOM)的精度尚缺乏实践验证。文中通过外业实测数据对不同航高无人机影像数据制作的DLG、DOM产品精度进行实际分析。针对航空摄影测量高程定位精度偏低的固有特性,提出了一种基于区域线性拟合的航测高程精度改善措施。研究结果可为实际应用提供理论和实践参考。

Practical Research on Mapping Precision of UAV- based on the Low Attitude Digital Photogrammetry—UAV- based on the low attitude digital photogrammetry technique had been used in many fields. However,the accuracy of its digital products,such as digital linear graph( DLG) and digital ortho map( DOM) were not fully tested. In the paper,the practical precision of DLG and DOM produced by different flying height was evaluated by field survey data. Method improving this precision by the field linear simulating was proposed aiming at lower vertical accuracy of digital photogrammetry. Research results could provide theoretical and practical references for applications.