摘要
针对当前三维时空数据内容丰富,GIS无法精确模拟三维空间数据动态显示的问题,本研究提出了一种三维时空数据库的Web端地信时空动态可视化方法,经由三维GIS的三维空间投影,显示三维地理时间空间信息。使用WEBGL图形库搭建三维可视化框架,将粒子系统模型应用于时空数据的动态可视化中。使用动态加载技术,对地形环境复杂、数据量较大的时空数据进行分割,减少了冗余时空数据。实验表明,所加载的时空数据时间最短为0.84 s,动态显示平均帧率高达45帧/秒,时空模型网格数和顶点数最小。
Due to the rich content of 3D spatio-temporal data,the current GIS system cannot accurately simulate the dynamic display of 3D spatial data.In this paper,a web-based spatio-temporal dynamic visualization method of 3D spatio-temporal database is proposed,which displays 3D geographic spatiotemporal information in the system through 3D projection of 3D GIS.WEBGL graphics library is used to build a 3D visualization framework,and the particle system model is applied to the dynamic visualization of spatio-temporal data.The dynamic loading technology is used to segment the spatiotemporal data with complex terrain and large data volume,and reduce the redundant spatio-temporal data.Experimental results show that the shortest loading time of spatio-temporal data in this study is0.84 s,the average frame rate of dynamic display is up to 45fps,and the number of meshes and vertices of spatio-temporal model is the minimum.
作者
秦聪
李鹏飞
QIN Cong;LI Pengfei(Shandong Guangting Information Technology Co.,Ltd.,Yantai 264000,China)
出处
《系统仿真技术》
2022年第2期130-135,共6页
System Simulation Technology
关键词
三维时空数据
地信时空动态可视化
WEBGL图形库
粒子系统模型
动态加载技术
数据分割
3D spatio-temporal data
spatio-temporal dynamic visualization of ground information
WEBGL graphics library
particle system model
dynamic loading technology
data segmentation
