遥感大数据实时渲染与交互可视化研究

数据可视化是遥感应用的重要服务出口。针对静态的预生成瓦片地图难以满足数据查看、地图配置、空间分析等专业应用问题,本文提出了一套面向遥感大数据的实时渲染与交互可视化的解决方案。在渲染节点构建影像的渲染瓦片结构,以提高数据的读取速度;在可视化服务上,提出“数据-计算”相一致的负载均衡策略,优化地图的渲染效率;在可视化服务方面,设计交互的地图服务接口。与传统技术的对比分析表明,该解决方案不但实现了遥感大数据的实时渲染与交互可视化,并且达到了与预生成瓦片地图服务相当的服务性能。基于这一解决方案,研发了遥感大数据的动态可视化原型,并在影像数据实时查看、可视化计算、可视化分析等方面开展了示范应用。

Real-time Rendering and Interactive Visualization of Remote Sensing Big Data

Data visualization is an important service in remote sensing applications. To address the problems that it is difficult for the static pre-built map tile service to meet the requirements of professional data view, map configuration, spatial analysis and other applications, this paper presented a solution architecture for the real-time rendering and interactive visualization of remote sensing big data. Firstly, on the rendering nodes, a rendering-tile structure for image was constructed to improve the reading speed of remote sensing images. Secondly, on the visualization servers, a data-computing load balancing strategy was proposed to optimize the rendering efficiency of map tiles. Thirdly, a set of service interfaces for the interactive visualization was designed for the front ends of services. Compared with the traditional technology, this solution can not only achieve the real-time rendering and the interactive visualization of remote sensing data, but also obtain an equivalent service performance to the pre-built tile map service. Finally, based on the above solutions, an interactive visualization prototype system of remote sensing data was developed and was applied into the demonstrations of the real-time viewing of remote sensing images, the visualized computing and the visualized analysis.