Mapping with asynchronous AJAX and SVG

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(No Transcript)
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Mapping with asynchronous AJAX and SVG

• A framework for GIS RIA

Dirk Frigne CEO DFC Software Engineering Karel
Maesen Sr. Consultant K.U.Leuven/SADL
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Overall Presentation Goal

• Introducing MAJAS a Geographic Information
  System as a Rich Internet Application

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Speakers Qualifications

• Dirk Frigne and Karel Maesen led the team that
  created MAJAS
• Jointly they have gt30 years experience in CAD/GIS
  Software Engineering
• Dirk is managing director of a leading GIS
  Software Engineering company in Belgium
• Karel is senior GIS consultant and researcher

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The History

• eGovernement project in Flanders
• Thin-client
• Geographic Data Editing
• Re-usability
• Easy-of-use
• Offered as Open Source
• Specific requirements (language, process)
• Limited budget / short time span

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The Challenge

• Develop a system that
• Presents geographic information (mapping)
• Allows vector data editing and snapping
• With the ease-of-use of a Desktop GIS
• BUT
• using no more than a web browser

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The Solution

• An architecture based on
• SVG as a format for geographic data on the client
• JSON as a lightweight client-server protocol
• Server side Command pattern for handling JSON
  requests
• Client Side MVC Command Pattern
• Based on
• Server side well known open source GIS
  components (Geotools)
• Client side using the DOJO toolkit

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How does it work 1/3
(RIA Ajax/Dojo)
Geo Web Services
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How does it work 2/3
JSON Command
UI Event
JSON Result List
Incl. SVG Path Elements
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How does it work 3/3
SOA
Domain 1 App1.1 App1.2
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So What? 1/2

• Its like Google Maps
• a navigable map in a browser
• ajaxified user interface
• (RIA)
• but different
• on-the-fly rendering
• datasource framework

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So What? 2/2

• and better (?)
• merging vector and raster data
• geometric editing with snapping
• extensible framework
• peer-to-peer server communication
• user configurable

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The future of

• Prelimary version 0.9 ready now
• Roadmap
• Version 1.0 by february 2007
• Full consulting editing functionality
• Acceptable performance
• Developer support
• Version 1.1 by July 2007
• internationalization
• User-interface improvements
• Performance enhancements

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Summary

• RIA for Geographic Information
• Easy to configure
• Easy to deploy
• Extensible framework
• WATCH OUT FOR IT ON http//www.cadrie.com/majas/

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DEMO
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QA
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• Thank you for your attention!