基于Cesium的数据可视化技术在水利上的应用

Application of Data Visualization Technology in Water Resources Management Based on Cesium

三维虚拟仿真技术已广泛应用于数据地球、数字城市、数字流域等领域,科学数据在仿真系统中的可视化更利于科研人员洞察数据背后的规律,然而在实际应用中,科学数据的表达更依赖于专业的可视化软件,从而造成其与现有仿真系统脱离现象。鉴于此,系统地介绍了热力图、水深属性标量可视化、投影纹理变换、气象云图绘制、水深等值线与等值面实时绘制等可视化技术的相关技术原理及实现方法,实现了多种技术在基于Cesium的三维仿真平台的有效集成;结果显示,各种技术显示帧率均大于每秒30帧,画面显示流畅,满足实时展示要求;丰富了原有系统的数据表现形式,为大容量科学计算及实时性展示提供了有力依据,有望在虚拟现实和科学可视化方面得到更广泛应用。

Three-dimensional virtual simulation technology is widely used in the fields of digital earth,digital city,digital watershed,etc.It is more conducive for scientific researchers to gain insight into the laws of the scientific data by using the visualization technology in the simulation system.However,the representation of scientific data is more dependent on professional visualization software in practical applications,which leads to its separation from the existing simulation system.In view of this,this paper systematically introduces the related technical principles and the implementation methods of visualization technology,such as heat maps,scalar visualization of water depth,projected texture transformation,meteorological cloud map drawing,water depth contours and isosurface real-time rendering,and effectively integrates a variety of technologies in the Cesium-based 3D simulation platform.The results show that the final display frame rate of each technology is greater than 30 fps so that it can meet the requirements of real-time display,and smooth screen.Based on the technology,the data representation form of the original system is enriched,and a strong basis for large-capacity scientific computing and real-time display is obtained.Therefore,it is expected to be more widely used in virtual reality and scientific visualization.