The magic of Ajax & WebGIS
1 like•839 views
This document provides an overview of Ajax and how it can be used in Web GIS applications. It defines Ajax as an acronym for Asynchronous JavaScript and XML, which allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes. Examples are given of how Ajax improves user experiences by allowing interactions without page reloads. The document then discusses how Ajax can integrate with GIS web services to build more interactive web mapping applications with features like live searches and dragging/dropping that rival desktop applications.
The magic of Ajax & WebGIS
- 1. The magic of Ajax & using in Web GIS Student: Bahman Jamali Email : [email protected] May 2013
- 2. Outline May2013The magic of Ajax & using in WebGIS2 Introduction Ajax, What is it?! How does it work? Examples In-Depth Ajax Power Ajax & WebGIS Case study References Questions?
- 3. Introduction Development Web technolog: Combine HTML & JavaScript & Css & … grab data from the server without reloading new pages into the browser the technology that lets Web software act like desktop software May2013The magic of Ajax & using in WebGIS3
- 4. Ajax, What is it?! by Jesse James Garrett of Adaptive Path, February 18, 2005 May2013The magic of Ajax & using in WebGIS4 is an acronym Asynchronous Javascript And XML Browser-based presentation using HTML and CSS Data stored in XML format and fetched from the server JavaScript to make everything happen
- 5. How does it work? 1) write code in JavaScript that can fetch data from the server 2) The XMLHttpRequest object, to send a request to the server 3) The data that comes back from the server can be XML or just plain text May2013The magic of Ajax & using in WebGIS5
- 6. How does it work? May2013The magic of Ajax & using in WebGIS6 wait for the data in the background and spring into action when the data does appear
- 7. Examples May2013The magic of Ajax & using in WebGIS7 Searching in real time with live searches Chatting with friends Dragging and dropping with Ajax Gaming with Ajax Getting instant login feedback Ajax-enabled pop-up menus Modifying Web pages on the fly Google Maps and Ajax
- 8. In-Depth Ajax Power May2013The magic of Ajax & using in WebGIS8
- 9. Ajax & WebGIS May2013The magic of Ajax & using in WebGIS9 • can be defined as ‘‘a Web application that combines data from more than one source into a single integrated tool’’
- 10. Case study May2013The magic of Ajax & using in WebGIS10 • AJAX integration with GIS web services Step 1: Browser (AJAX) request to the web server. The request may be spatial information or map. Step 2: Web server tier has the responsibility to change the response comes from the GIS server Step 3 :The basic function of GIS Application server is to receive the request comes from the web server, and then contact the data tier for reading files or database Step 4: The data tier has the GIS files and database include tables for using MySQL, this tier communicates with the GIS server directly.
- 11. • Faster web actions • Less or no page refreshes • Reduce network traffic • Decreased server-side bandwidth usage • Web apps that rival installes GUI apps • Very suitable for big data like maps. • More interactivity for WebGIS May2013The magic of Ajax & using in WebGIS11 Conclusion
- 12. May2013The magic of Ajax & using in WebGIS12 References
- 13. May2013The magic of Ajax & using in WebGIS13 Thanks Thank you Now Open Discussion! Available for download in Mazinan.ir