基于三维定位技术的水文地质测绘方法研究

Research on hydrogeological mapping method based on three-dimensional positioning technology

摘要:

在现有的水文地质测绘方法研究工作中,缺乏三维(3D)定位技术进行优化和改进。为此,本研究首次提出一种基于雷达卫星和大数据平台的信息化水文地质测绘系统,其引入了超连续谱激光高光谱(Super continuum laser hyper spectral,SCLaHS)雷达系统在中高空通过激光扫描水文地质进行成像,其3D定位算法由全球导航卫星系统(global navigation satellite system,GNSS)阴影匹配与3D地图辅助测距的集成,分别单独的计算3D地图测距和阴影匹配位置解,然后使用方向相关加权进行组合。实验结果表明,该算法的定位精度提高了许多,使用基于协方差的加权获得的平均精度值提高10%,保证了测绘点覆盖率更加有效。

Abstract:

In the existing research on hydrogeological surveying and mapping methods, there is a lack of three-dimensional (3D) positioning technology to optimize and improve. Therefore, this study proposes an information hydrogeological mapping system based on radar satellite and big data platform for the first time. It introduces supercontinuum laser hyperspectral (SCLaHS) radar system to image hydrogeology through laser scanning at medium and high altitude, and its 3D positioning algorithm is determined by global navigation satellite system (GNSS) The integration of shadow matching and 3D map aided ranging separately calculates the location solutions of 3D map ranging and shadow matching, and then combines them with direction correlation weighting. The experimental results show that the positioning accuracy of the algorithm is improved a lot, and the average accuracy obtained by using covariance based weighting is improved by 10%, which ensures that the coverage of mapping points is more effective.