无人机空地一体航测技术在天桥设施施工中的应用

Application of UAV air-ground integrated aerial survey technology in the construction of flyover facilities

随着时代的不断发展和科学技术的不断进步,无人机航测作为一门新兴的测绘手段,以其便利性强、灵活性高等特点,近年来在工程测绘领域中得到广泛应用。针对单依靠倾斜摄影构建三维模型存在模型变形、拉花、纹理缺失等问题,提出一种基于无人机空地一体航测技术的精细化建模方法,将航空倾斜摄影技术和贴近摄影测量技术结合起来进行三维精细化模型构建。以某一正在施工的过街天桥为例进行三维建模实验,结果表明,基于该方法建立的精细三维模型精度符合《工程测量标准》(GB 50026-2020)的精度要求,且弥补了单依靠航空倾斜摄影构建三维模型的不足,可为其他相关工程建设提供参考。

With the continuous developments and progresses of science and technology,UAV aerial survey,as an emerging surveying and mapping method,has been widely used in the field of engineering surveying and mapping due to its strong convenience and high flexibility.Aiming at the problems of model deformation,patterning,and lack of texture in the construction of 3D models based on oblique photography alone,a refined modeling method based on drone air-ground integrated aerial survey technology is proposed,which combines aerial oblique photography technology and close photogrammetry technology to carry out three-dimensional refined model construction.This paper takes a cross-street bridge under construction as an example to carry out the 3D modeling experiment.The results show that the precision of the fine 3D model based on this method fully meets the accuracy requirements of the standard for engineering surveying and it makes up for the lack of relying solely on aerial tilt photography to build a 3D model.It can provide reference for other related projects.