My presentation is about AJAX and its applications in WebGIS.

1. The magic of
Ajax
&
using in
Web GIS
Student:
Bahman Jamali
Email : mazinan@gmail.com
May 2013

2. Outline
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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
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4. Ajax, What is it?!
by Jesse James Garrett of
Adaptive Path, February 18,
2005
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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
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6. How does it work?
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 wait for the data in the background and spring
into action when the data does appear

7. Examples
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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
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9. Ajax & WebGIS
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• can be defined as ‘‘a Web application that combines data from more than one source into a single
integrated tool’’

10. Case study
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• 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
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Conclusion

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References

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Thanks
Thank you
Now
Open Discussion!
Available for download in Mazinan.ir