基于地理信息服务的海量气象信息网络发布

针对WebGIS在海量气象数据发布中的诸多不足,通过对地理信息服务的研究,结合气象数据本身所具有的特点,对栅格气象数据的发布采用了一种灵活高效的影像金字塔模型构建算法,结合服务器端动态生成切片的方式,有效减少了I/O操作和重采样计算,从而提高了系统的处理速度。在完成矢量气象数据发布的基础上实现了各区站气象信息的多级显示,实现了气象信息资料的共享和网络发布。实践证明,采用该方式能够实现在改变缩放级别时,地图数据的快速加载以及无缝拼接,为后续气象GIS平台的开发以及高效运行奠定了基础。

Mass Meteorological Data Web Publishing Based on Geographic Information Service

As WebGIS has many shortcomings in publishing mass meteorological data, GIS technology is applied to meteorological data processing. Considering the characteristics of meteorological data, GIS is a good tool to publish mass spatial meteorological data efficiently. To publish grid meteorological data, a flexible and efficient constructing algorithm using the image pyramid model is adopted, combined with the method of generating tiles dynamically on the server, which aims at reducing I/O operations and resampling calculation. Besides the publishing of vector meteorological data, the multi level display of data from various stations and the publishing and sharing on the Internet of mass meteorological information are realized satisfactorily. The application proved that by this way, map data can be processed and published very fast, which can provide references for the follow up development of the meteorological GIS platform.