基于同步定位与地图创建算法的大比例地形激光测绘方法

Large Proportion Topographic Laser Mapping Method Based on Synchronous Localization and Map Creation Algorithm

在传统大比例地形测绘中,地形图与实际地形存在误差,为此提出基于同步定位与地图创建算法的大比例地形激光测绘方法。基于同步定位算法布设所测地形中的像控点,提取坐标,建立映射关系,通过数字微分纠正,获得所测地形的正射影像,在地图创建算法的辅助下,建立数字高程模型,构建地形地势的区别,计算激光惯导的激光里程计,实现大比例地形的激光测绘。实验结果表明,实验组的测绘平均误差率为3.69%,比对照组低8.04个百分点,表明激光测绘方法有效降低了测绘误差。

In traditional large-scale terrain surveying,there is an error between the terrain map and the actual terrain.This paper proposes a large-scale terrain laser surveying method based on synchronous positioning and map creation algorithms.Based on synchronous positioning algorithm,the image control points in the surveyed terrain are deployed,coordinates are extracted,mapping relationships are established,and digital differential correction is used to obtain the orthophoto image of the surveyed terrain.With the assistance of map creation algorithm,a digital elevation model is established to construct the differences between terrain and terrain,and laser odometry for laser inertial navigation is calculated to achieve laser surveying of large-scale terrain.The average measurement error rate of the experimental group in the experiment was 3.69%,8.04 percentage points lower than the control group,indicating that the laser measurement method effectively reduced measurement errors.