RIA和GeoWeb GeoWeb架构 Rich GeoWeb Viewer 设计原则 架构设计 Flex，JavaScrip和Silverlight 演示 2002年Macromedia首先启用RIA一词 随后Macromedia发布Flash Remoting，开始 真正的RIA应用 2005年Adobe收购Macromedia，RIA快速成 长 RIA简单定义： 互联网应用程序 提供类似桌面系统的实用性及多媒体化 AJAX Adobe Flash/Flex/AIR Microsoft Silverlight Sun JavaFX (?) Firefox 3 (Prism, Tamarin, IronMonky) Google (Gear, GWT, Chrome, etc.)HTML HTML httpRequest Java Applet Flex AIR DHML Flash Firefox Java Java Web StartRemoting Scripting ActiveX Silverlight WPF .NetJavaScript JavaFX Google GWT Gear开放 基于各种标准 广泛 有浏览器就能使用 没累赘 只有网页，没有程序装载 发布 一切都在网络服务器上操作富使用感受 类似桌面系统的界面，多媒体，全进程 应用程序 本地处理和集成 快速，高性能，利用本地资源 界面工具 强大多样的界面开发工具，方便快捷程 序开发 下线功能 不需要随时在线 Geospatial Web 1994年，Dr. Charles Herring，An Architecture of Cyberspace: Spatialization of the Internet， Army Construction Engineering Research Laboratory 网络化数字地图奠定GeoWeb基础 网络数字地图GeoWeb支持 协作式计算 服务集成 (Mashups) 用户提供内容Distributed Data Management多元参与 互联 合作 集成Dynamic分布式协作Web 2.0Web 1.0GeoWeb移动互联网GDB桌面应用服务器服务与 Geospatial 数据管理地图 三维图像化 Geoprocessing 数据管理开放式 APIsOGCKMLSOAP SQLArcGISPublishing Services服务提供者S1S2S3SnS2+S3S1Mashups外部服务资源S1移动通讯S1S3企业信息系统 仅用数字地图显示地标不足以解决问题 需要基于地图的互动 需要以简捷方式释放大量含空间信息的数据 需要以空间图像化来表达被处理的空间信息 需要用基于地点的服务来提高决策机能 Rich GeoWeb Viewer提供一个窗口来满足这 些需求ArcGIS发布的服务服务提供者S1S2S3SnS3S1Mashups外部服务资源移动通讯S1S3企业信息系统Rich GeoWeb Viewer“Everything should be made as simple as possible, but not simpler.”- Albert Einstein“Simplify, and add lightness”- Colin ChapmanYAGNI (You arent Gana Need It) “Always implement things when you actually need them, never when you just foresee that you need them.”- Ron JeffriesDRY (Dont Repeat Yourself, aka Single Point of Truth) 复合式体系架构 (composite architecture) 可扩充性 (extendable) 可配制性 (configurable) 内部模块可替换性(swappable) 品牌化 (brandable) 开放与服务性 (open and service centric) 支持多种RIA技术 (RIA technology neutral) 一个widget是一个单独部署的文件 一个widget包含特定的业务逻辑 一个widget是通过配置文件来部署 一组widget可代表一套业务解决方按 可通过调整widget来扩充解决方按，而不是 经过再编程以至增加系统的复杂性 Widget的开发远比整个系统开发容易 用户界面 基本地图(base map) 基于地图的服务RL 装备 部署的widget Widget自身配置 数据源RL 数据过滤 个性化改变 配置文件 图标icons stylesheet 改头换面 Widget模版 Viewer嵌入 替换核心模块1. 2. 5. 6. 7. 8. 9. 10. 11. 将新widget加入配置文件MyFirstWidget.swfWidget JavaScript 程序文件代码1. dojo.provide(“com.xyz.widgets.ANewWidget“); 2. dojo.require(“com.esri.solutions.jsviewer._BaseWidget“);3. dojo.declare(4. “com.xyz.widgets.AnewWidget“, 5. com.esri.solutions.jsviewer._BaseWidget,6. 7. / DemoWidget code goes here8. _module: “com.xyz.widgets“,9. templatePath: dojo.moduleUrl(“com.xyz.widgets“,“templates/ANewWidget.html“),10. hello: “hey there!” 11. 12. );Widget HTML文件代码1. 1. $hello 1. Stimulus Reporting$40,000$40,000$40,000$40,000$40,000$40,000$40,000$40,000$40,000$400,000$500,000$2,000,000$40,000Housing: $ 2,000,000Environment: $ 400,000Overall S:mulus StatewideHealthEduca:onTransporta:onEnergyHousingWorkforcePublic SafetyEnvironmentOverall S:mulusSTIMULUS PROJECTS NEAR ME:Address, Zip CodeClick on icons to get more informa:onLearn about our approachStimulus Reporting$40,000$40,000$40,000$40,000$40,000$40,000$40,000$40,000$40,000$400,000$500,000$2,000,000$40,000Overall S:mulus with Popula:on Density StatewideLOW HIGHNeed Maps: Popula:on Density Household Density Per capita income (1999)HealthEduca:onTransporta:onEnergyHousingWorkforcePublic SafetyEnvironmentOverall S:mulusSTIMULUS PROJECTS NEAR ME:Address, Zip CodeClick on icons to get more informa:onLearn about our approach123 Main StStimulus ReportingHealthEduca:onTransporta:onEnergyHousingWorkforcePublic SafetyEnvironmentOverall S:mulusSTIMULUS PROJECTS NEAR ME:123 Main StreetClick on icons to get more informa:onOverall S:mulus Selected CountyEduca:on: $ 200,000Environment: $ 100,000$40,000$500,000Overall$ 1,100,000Health$ 100,000Educa:on$ 200,000Transporta:on$ 150,000Energy$ 150,000Housing$ 100,000Environment$ 100,000Workforce$ 100,000Public Safety$ 200,000Learn about our approachStimulus ReportingABC Elem: $ 80,000XYZ High: $ 40,000Public K12 Selected CountySpecific Projects$25,000$40,000Overall$ 1,100,000Educa:on$ 200,000Public K12$ 120,000ABC Elem$ 80,000XYZ High$ 40,000ABC Elementary Funding: $80,000 Es:mated Comple:on: APR 2010HealthEduca:onTransporta:onEnergyHousingWorkforcePublic SafetyEnvironmentOverall S:mulusSTIMULUS PROJECTS NEAR ME:123 Main StreetClick on icons to get more informa:onLearn about our approachStimulus ReportingEduca:onwith Math Proficiency StatewideDECLINE