摘要
针对北京市气象局气象观测数据Web显示系统功能较弱这一状况,采用开源性WebGIS软件MapServer和免费的PostgreSQL数据库软件,结合PHP,Java applet技术开发了基于WebGIS的气象信息发布系统。该系统以直观形式将实时数据与地理信息结合在一起,实现了数据的动态查询和统计查询,尤其是实现了风向杆和等值线以及等值面的叠加。该系统为预报工作提供了及时、有效、科学的辅助决策支持。
With the rapid development of detection technique in meteorology, more and more real-time detection data are obtained in Beijing Municipal Meteorological Bureau, but the integrated display system for all kinds of detection data is relatively left behind. Considering the situation, a meteorological information display and query system is developed, free software Mapserver and PostgreSQL are used in the system.
Mapserver is an open source development platform which multi-format geographic data are supported on Internet. MapServer is not a full-featured WebGIS system. Instead, MapServer is good at rendering geographic data like maps,images, and vector data on the web. Beyond browsing GIS data, MapServer allows you to create ＂geographic image maps＂ that are, maps that can direct users to the content. Many kinds of geographic format data are supported, interface for second development in many language is provided, and it can be used in many operation systems. MapFile is a kind of file format, in which the color and style of map elements are defined. Map elements are managed and organized by MapFile in Mapserver. What users need to do is just to setup up Mapserver and configure Web server correctly and create their own MapFile, then their WebGIS system is built successfully. PostgreSQL is also an open source Database software. Usually, PostgreSQL is used to manage their data, such as GIS database.
It is very easy to build a WebGIS system by using Mapserver and PostgreSQL. In Beijing Municipal Meteorological Bureau, Linux system is chosen as WebGIS operation system. First, Mapserver and PostgreSQL need to be installed under Linux system. In addition, some configurations need be done to make sure they can work together. Second, detection data database has to be built. Database is used to store meteorological observation data and at the same time makes query more efficient. The third step is to handle station data which is very important. Station data are converted into geographic format data, which are points d
出处
《应用气象学报》
CSCD
北大核心
2008年第1期116-122,共7页
Journal of Applied Meteorological Science
