基于World Wind平台的海洋流场三维可视化研究

Research on 3D visualization of ocean environment information based on World Wind platform

针对如何在庞大但杂乱无章的海洋流场数据中获取有用信息,提出了建立三维动态可视化的World Wind平台。以Codar地波雷达采集到的三维空间数据为基础,对其进行了预处理,包括格式变换、提取有效数据经纬度和速度矢量信息(X、Y、U、V)和求取数据的最大范围,将处理后的每一时刻数据依据点图标映射法进行颜色映射,依照颜色映射结果,将处理后的每一时刻数据利用Direct3D技术绘制成流场箭头显示的形式,并在此基础上剪辑成视频,实现在World Wind平台上三维动态可视化的显示海洋流场信息。结果表明,该方法可直观展示流场信息的动态变化效果,并能为挖掘隐含信息提供方法。

To obtain useful information from large amounts of ocean flow field data, World Wind platform of3 D dynamic visualization was proposed. 3D space data which collected by Codar ground wave radar were prepro-cessed for format conversion, extraction of available data of latitude, longitude and the velocity vector information,and the maximum range of data calculation. Processed data of each moment was color mapped on the basis of pointicon mapping method. According to the result of color mapping, the processed data of each moment were drawn intothe flow field in the form of arrows using Direct3 D technology. On this basis, it was edited into a video. The oceanenvironment information was showed on 3D dynamic visualization based on World Wind platform. The result indi-cates that the platform can directly show the effect of dynamic changes of the flow field information, and the plat-form can provide method to excavate the implied information.