无人机航测技术在原始密林地貌1∶500地形图测绘中的应用

Application of UAV aerial survey technology in 1∶500 topographic mapping of primitive dense forest landform

无人机航测技术因其具有机动灵活,高效快速,精细准确,作业成本低,适用范围广,生产周期短等特点,在小区域和飞行困难地区高分辨率影像快速获取方面具有明显优势,已广泛应用于众多行业领域。本文以重庆市某测绘项目的实施为例,首先,介绍了无人机航测技术在原始密林地貌1∶500地形图测绘中的应用方法;其次,详细介绍了无人机航测系统的特点及获取扫描点云数据后的处理和成图流程;最后,通过点云数据预处理,高程数据自动提取和高程内插拟合等技术方法,实现了地形图测绘成果的快速与精确化获取。项目应用实践表明,相较于传统测绘方式,无人机航测技术不仅可以极大地提高测绘作业效率,还能保证测绘成果质量,满足精度要求,具有非常广阔的应用前景。

UAV aerial surveying technology has many advantages in rapid acquisition of high resolution images in small areas and difficult flight areas due to its flexibility,efficiency,speed,precision,accuracy,low operating costs,wide applicability,and short production cycle.It has been widely used in many industries.Taking the implementation of a surveying and mapping project in Chongqing City as an example,this paper firstly introduces the application of UAV aerial surveying technology in 1∶500 topographic mapping of primitive dense forest landform.Secondly,it introduces in details the characteristics of the UAV aerial survey system and the processing and mapping process after acquiring scanning point cloud data.Finally,it has achieved the rapid and accurate acquisition of topographic mapping results through point cloud data preprocessing,automatic elevation data extraction,elevation interpolation fitting and other technical methods.The project application practice has shown that compared with traditional surveying methods,UAV aerial surveying technology can not only greatly improve the efficiency of surveying operations,but also meet the accuracy requirements while ensuring the surveying results,and has a very broad application prospects.