基于Flex框架的数字校园建设关键技术  

Key Technology of Digital Campus Establishment Based on Flex Framework

作　　者：冉飞鹏[1,2] 江涛[2] 戴华阳[1] 彭新广[1] 

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]山东科技大学,测绘科学与工程学院,青岛266590

出　　处：《地球信息科学学报》2013年第1期123-127,共5页Journal of Geo-information Science

基　　金：国家自然科学基金项目(40701112);国家高技术研究和发展“863”计划项目(200912Z12147)

摘　　要：传统的基于ArcGIS API for Flex的数字校园系统存在以下几个问题:(1)在目标定位时,只定位到目标建筑物几何中心位置,对建筑物内部具体单元定位精度不够;(2)管理者更新、维护空间数据须结合地图编辑软件和ArcGIS Server来实现,给数据维护造成不便;(3)360度实景导航技术在数字校园中的引入已成为研究热点,而大量实景数据必然增加了系统负担,降低加载速度。本文提出采用精确地理定位网的方法,即在处理线状道路数据时,暂不考虑真实目标之间的位置关系,细化原线状矢量层,并与其他网络分析图层分别保存,使得定位更加精确;以新版ArcGIS的Feature Access,采用ArcGIS API for Flex在线编辑工具进行在线编辑地图;将360度实景数据在服务器上管理,生成实景链接地址,在程序运行时只需调用该链接。本文以某高校数字校园系统为例,验证了精确地理定位网方法、实景数据的单独管理,以及在线地图编辑的可行性与有效性。Traditional electronic map,which is based on ArcGIS API for Flex,just navigates to the geometric center of the target building,but the positioning accuracy of the specific unit inside the building is not enough.To update and maintain spatial data,administrators must resort to map editing software as well as ArcGIS Server.Further more,with 360-degree Virtual navigation in the digital campus becoming a research hotspot,massive data will inevitably increase the burden of the system and reduce the loading speed.To this end,in this article we proposed a method on the precise geolocation network using,in order to make the positioning more accurate.While processing linear road data,we don＇t have to consider the relationship among real targets but refine the original linear vector layer and stored this layer and other linear layers separately.The latest version of ArcGIS supports the Feature Access,the ArcGIS API for Flex provides online editing tools to achieve the online map editing purposes.To reduce the size of the project,the real data on the server should be stored separately and the address link recorded and called when the application is running.In order to achieve better interaction with the digital campus,we adopted technology of RIA（Rich Internet Application） and built the digital campus system of Shandong University of Science and Technology based on ArcGIS Server and ArcGIS API for Flex.The system realized functions of geocoding address,querying,the shortest route analysis,online map editing and 360-degree virtual navigation.In this paper we focused on the key technologies on data arrangement,generation of 360-degree data and programming of the project.The successful experiments show that the precise geographical positioning network method,the separate management of the real data and online map editing are feasible.

关 键 词：在线地图编辑 地理定位 数字校园 360度实景导航 ARCGIS API for FLEX 

分 类 号：P208[天文地球—地图制图学与地理信息工程] TP311.52[天文地球—测绘科学与技术]