基于无人机机载激光雷达的海岛建筑物高度测算技术

Height Measurement Technology of Island Buildings Based on UAV Airborne Lidar

摘要:

当前技术在测量海岛建筑物高度时，得到的激光点云数据质量差，测算结果不准确。为了解决上述问题，基于无人机激光雷达研究了一种新的海岛建筑物高度测算技术。利用无人机自动控制技术对海岛建筑物进行多点多角度照片拍摄，拍摄方案有两种，分别是折线形飞行方案和环绕型飞行方案；在海岛建筑物的不同位置和不同高度设置多个地面影像控制点，通过航拍得到各个海岛区域的特征图像，利用Smart3D建模软件完成建模，将建立的三维模型从图像空间坐标系转换到大地空间坐标系，从而得到海岛建筑物高度。与传统测算技术进行实验对比，结果表明，基于无人机激光雷达的海岛建筑物高度测算技术测算精度高于传统技术，对于海岛管理有很好的促进作用。

Abstract:

When the current technology measures the height of an island building, the obtained laser point cloud data is of poor quality and the measurement result is not accurate. In order to solve the above problems, a new sea-island building height measurement technique is studied based on the UAV laser radar. UAV automatic control technology is used to make multi-point and multi-angle photo shooting of island buildings. There are two shooting schemes, namely, a linear flight scheme and a surround flight scheme; multiple locations at different locations and different heights of island buildings The ground image control point obtains the feature images of each island area through aerial photography, and uses Smart3D modeling software to complete the modeling, and converts the established 3D model from the image space coordinate system to the geospatial coordinate system to obtain the height of the island building. Compared with the traditional measurement technology, the results show that the calculation accuracy of the island building height measurement technology based on the UAV laser radar is higher than the traditional technology, which has a good promotion effect on island management.