The Application of UAV-Based Oblique Photography in Urban Surveying and Mapping

UAV-Based Oblique Photography, by capturing high-resolution images from multiple angles and integrating computer vision and photogrammetry algorithms, provides an efficient and high-precision 3D modeling solution for urban mapping. Technology utilizes a UAV platform equipped with multiple cameras to synchronously acquire vertical and tilted images, and combines key technologies such as aerial Triangulation, multi-view stereo, triangulated irregular network and texture mapping, which significantly improves the realism and detail expression of the 3D model. Currently, technology has been successfully applied to large-scale topographic mapping, bridge inspection, and other fields, overcoming the limitations of traditional aerial photography and manual surveying. In the future, with the integration of deep learning technology, it will further optimize the model accuracy and automation level and promote its in-depth development in the fields of smart city and digital twin, such as the application of SurfaceNet and Generative Adversarial Network (GAN) framework. UAV-based oblique photography, with its advantages of low cost and high flexibility, is gradually becoming a core tool for modern urban mapping.