| 基于Flex的气象信息网络发布平台设计与实现 |
| |
| 引用本文： | 孙利华,吴焕萍,郑金伟,罗兵,王琪,胡利霞,郑卫江,吕终亮.基于Flex的气象信息网络发布平台设计与实现[J].应用气象学报,2010,21(6):754-761. |
| |
| 作者姓名： | 孙利华 吴焕萍 郑金伟 罗兵 王琪 胡利霞 郑卫江 吕终亮 |
| |
| 作者单位： | 1.中国矿业大学 (北京), 北京 100083 |
| |
| 基金项目： | 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 Applications) 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。
|
| 关 键 词： | Flex RIA 网络GIS 气象信息发布系统 |
| 收稿时间： | 2009-11-25 |
Designing and Implementation of Meteorological Information Web Sharing System Based on Flex |
| |
| Sun Lihua,Wu Huanping,Zheng Jinwei,Luo Bing,Wang Qi,Hu Lixia,Zheng Weijiang,Lü Zhongliang.Designing and Implementation of Meteorological Information Web Sharing System Based on Flex[J].Quarterly Journal of Applied Meteorology,2010,21(6):754-761. |
| |
| Authors: | Sun Lihua Wu Huanping Zheng Jinwei Luo Bing Wang Qi Hu Lixia Zheng Weijiang Lü Zhongliang |
| |
| Affiliation: | 1.China University of Mining & Technology, Beijing 1000832.National Meteorological Center, Beijing 1000813.Wuhan University of Technology, Wuhan 430070 |
| |
| Abstract: | 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 plug in 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 meta data tables. The second issue is meteorological data conversion. Utilizing model builder technology, some complicated geo processing models as tasks are established, which can automatically accomplish data conversion, data generation and data loading. The task can be done as a batch job by customizing parameters of the model manager. The third issue is cache technology for map services. Basic geographic map and meteorological services are cached with different strategies to improve the display efficiency. The last issue is map display technology based on Flex. Due to combination ArcGIS API for Flex with features and special effects of Flex, the meteorological information delivering system is notable and interactive.In conclusion, Flex and Flash are feasible in meteorological information sharing field, improving the display efficiency of meteorological data in internet GIS. The advantages of this system comparing with the conventional Web GIS in meteorological field are discussed. This system can also bring a high performance meteorological information sharing platform based on network for emergency and public meteorological services. It can also lay solid technique foundation for constructing more effective meteorological information delivering system in nationwide. |
| |
| Keywords: | Flex RIA Internet GIS Meteorological Information Web Sharing System |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《应用气象学报》浏览原始摘要信息 |
|
点击此处可从《应用气象学报》下载全文 |
|
