基于Flex的气象信息网络发布平台设计与实现  

Designing and Implementation of Meteorological Information Web Sharing System Based on Flex

作　　者：孙利华[1] 吴焕萍 郑金伟 罗兵 王琪[3] 胡利霞[3] 郑卫江 吕终亮 

机构地区：[1]中国矿业大学(北京),北京100083 [2]国家气象中心,北京100081 [3]武汉理工大学,武汉430070

出　　处：《应用气象学报》2010年第6期754-761,共8页Journal of Applied Meteorological Science

基　　金：科技部项目(2006BAK01A29;2006BAK01A18;2006BAD04B10;2007BAC29B06)资助

摘　　要：通过分析气象数据的特点和RIA(Rich Internet Applirations)技术的优势,结合系统建设目标提出了基于Flex的网络GIS气象信息发布平台的总体框架,并详细介绍了该平台的主要功能。对系统建设的关键技术问题进行详细分析,主要包括数据组织与管理、气象数据转换、地图服务缓存以及基于Flex的地图展现技术等。系统运行结果表明:与传统气象网络GIS相比该系统具有界面元素丰富、交互响应快、大数据量的显示效率大大提高等方面的优势。该系统为气象工作人员、应急气象服务及公众提供了一个实时、快速、基于网络的气象信息共享平台。With the pace of meteorological service information accelerated,more and more kinds of comprehensive meteorological observation and forecast data have been produced.To share meteorological data timely and effectively online,the meteorological information delivering system is established based on Flex and Rich Internet Application（RIA） which are of advantage in internet GIS. On the basis of user requirement and the construction target analysis,a general framework composed of four layers is proposed for the Meteorological Information Web Sharing System.The data layer on the bottom mainly stores meteorological data,geo-spatial data and socioeconomic data,providing fundamental data for upper layers.The upper service layer consists of various GIS services,Web services and LiveCycle Data Service.Different data and application services will be sent according to different requests from presentation layer.The presentation layer is composed of visual Flex controls,including map-display object, geometric object,functional object etc.This layer communicates with data service layer and interacts with the client layer.The uppermost layer is the client layer with Flash plugin installed for running SWF files. The features of the sharing system are introduced from six aspects,including basic geographic information displaying,meteorological data displaying,information querying,data downloading,spatial analysis on meteorological data,and web map plotting/outputting.Finally,four key issues related to this system are further discussed.The first one is data organization and management.Massive data of the system are stored and managed by category.For instance,the view of existing data based on old database structure is newly designed for management,obtaining a minimum dataset satisfying constraint in order to improve data access efficiency.With respect to meteorological data stored as a file form,spatial database is adopted. Meanwhile,all data is created following by metadata tables.The second issue is meteorological data conversio

关 键 词：FLEX RIA 网络GIS 气象信息发布系统 

分 类 号：P409[天文地球—大气科学及气象学]