气象网格数据的快速渲染研究与应用

随着更高精度的气象网格数据在气象业务中的广泛应用，使用高精度网格数据为社会公众提供精细化气象服务的需求越来越旺盛。针对气象网格数据文件大，网页前端动态渲染效率低等问题，提出基于瓦片金字塔模型的网格数据快速传输和渲染技术的研究及应用。采用服务器端的金字塔模型的瓦片动态切割、压缩传输以及浏览器终端的插值和渲染等技术，实现基于B/S框架下HTML5的气象网格数据快速展示的流程。同时，利用中国区域1 km分辨率多源融合实况分析产品，基于微信小程序终端进行检验发布，试验结果表明，百兆级气象网格数据可视化更新时间达毫秒量级，可以广泛应用于各类空间网格数据高效可视化的页面渲染。

Research and Application of Fast Rendering Technology of Meteorological Grid Data

With the wide application of higher precision meteorological grid data in meteorological operations, the demand for using high precision grid data to provide refined meteorological services for the public is growing. Due to the large data file of the meteorological grid, the rendering efficiency over time is slow on the front end network page. In order to solve this problem, a visualization scheme based on the tile pyramid model for fast transmission and rendering of grid data is proposed. This scheme involves tile cutting, data compression, data interpolation and rendering, and realizes the dynamic visualization process of meteorological grid data under the B/S framework based on HTML5. The China 1 km multi source gridded products are used to complete the research relying on the WeChat mini program. The experimental results show that the visualization display efficiency of 100 megabyte meteorological grid data is improved to the second level or even millisecond level. The solution of this system can be applied well in all kinds of spatial grid data based on the browser.