Developing Efficient Web-based GIS Applications

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referred paper of Longley, Singleton and Adnan, 2010,

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  • @Eduardo Penteado.. if you are using an ESRI stack then the ESRI JavaScript API will work .OpenLayers has built in support for ESRI REST layers, and if you are looking to reuse your code for non-ESRI based websites then again an open API serves you best.
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  • Hi.

    I`ve just started working with GIS applications and my concern is to develop a great database and have it stolen by Google, Microsoft, or any other.

    Which API do you suggest regarding privacy?
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Developing Efficient Web-based GIS Applications

  1. 1. Developing Efficient Web-based GIS Applications By SWETHA A 5WD12CGI15 Adnan, M., Singleton, A.D., and Longley, P.A.
  2. 2. Introduction • Multimap ( 7.3 million in UK) • Mapquest (47 million in US) • 50,000 websites that took feeds from the Google Maps (http://maps.google.com) site • GIS-enabled web applications can utilize any of a number of technologies and database platforms.
  3. 3. Insight Of The Paper • Mapping, database, and development technologies that are being used to develop high volume web- based GIS applications • Different technologies and their usefulness in different scenarios in order to perform in a range of circumstances.
  4. 4. • Public profiler (http://www.publicprofiler.org/worldnames) • Flash maps
  5. 5. Mapping Technology Or Visualisation Functionality (Websites Presenting Geographic Data) • Static Map Renderers • Slippy Maps • Flash Mapping
  6. 6. Static Map Renderers • Render maps in the form of images. • Do not allow any user interaction(static images) • Resulting map is very simple and easy to interpret.
  7. 7. • (http://www.nationaltrustnames.org.uk). • Website that allows users to view the spatial distribution of their family names
  8. 8. Slippy Maps Or Tile-based • Widely used geo-visualisation techniques • This technique works by dividing the map into a discrete number of zoom levels, so that each zoom level has an identical number of tiles. • Google Maps, Microsoft Virtual Earth, Yahoo Maps, Mapnik, Open Layers, MapTube and ArcGiS • Dynamic and faster to load
  9. 9. Tiling in slippy maps
  10. 10. FLASH MAPPING • Based on Vector images( drawn dynamically by using mathematical calculations which do not allow the map to become distorted and keeps it in the right shape). • API into ArcGIS (ArcGIS Flex API) and Flash with the Google Maps API
  11. 11. (http://www.adobe.com/products/flash/) has become popular as a mapping solution
  12. 12. • APIs manage complex details of connectivity using the GIS package and they provide an easy to use interface for developers • Flash Action Scripts • Information might entail adding a point, line or polygon, or equally might entail adding some more complex graphics to the map, e.g. custom navigation Flash controls
  13. 13. Choosing An Appropriate Mapping Technology • Static Map Renderers • Slippy Maps(on-the-fly) • Flash Mapping
  14. 14. DBMS • Can chose Oracle(http://www.oracle.com) SQL(http://www.microsoft.com/sqlserver) • Not to be chosen MySQL (http://www.mysql.com) MS-Access (http://office.microsoft.com/access)
  15. 15. NORMALISATION • Normalisation is a technique used to reduce data redundancy while maintaining integrity of the data in the database. • Four forms first, second and third Normal form, and the Boyce-Codd Normal Form (BCNF).
  16. 16. STORED PROCEDURES • Stored in database dictionary as database objects • Enhance the speed of data retrieval • Stored procedures offer a number of important benefits over queries. • The DBMS only compiles them when they are called for the first time(This improves the speed of access to the database and enhances the performance).
  17. 17. DATABASE INDEX • Enhancing the data retrieval speed • Database indexes are created in one or more columns of a table and enable a database system to perform rapid random lookups on the database table • Database index references the key-fields • Clustered or • Un-clustered
  18. 18. Web Application Development Standards for GIS applications • Design Standards Web Wireframing • Development Standards
  19. 19. Web Wireframing • Web wireframing is a unique concept in web site design and development • Web wireframing helps in creating a final design of the website before its actual development • Adobe Illustrator (http://www.adobe.com/products/illustrator) • Microsoft Visio(http://office.microsoft.com/visio) • ProtoShare (http://www.protoshare.com)
  20. 20. ProtoShare (http://www.protoshare.com)
  21. 21. example of a web wireframe, which demonstrates how the web page will look like after development.
  22. 22. DEVELOPEMENT STANDARDS • Windows only ASP (Active Server Pages) ASP.NET (Active Server Page dot Net) • Any OS PHP (Hypertext Preprocessor) JSP (Java Server Pages)
  23. 23. COMMUNICATION PROTOCOLS • A GIS web application often stores temporary data in files or communicates with other web applications over the web • Common protocol is SOAP (Simple Object Access Protocol): • SOAP uses  XML (Extensible Markup Language)  HTTP (Hypertext Transfer Protocol) for communication.
  24. 24. ARCHITECHTURE
  25. 25. ARCHITECHTURE OF WEB-BASED GIS APPLICATIONS
  26. 26. CONCLUSION • This paper has described the different mapping technologies, database standards, and web application development standards that are relevant to the development of web GIS applications. • Development of efficient web-based GIS applications – Flash Mapping or Slippy as Mapping Technology – Oracle is the system of choice for geospatial applications – Web Wireframing for to design website. – Use of a common communication protocol (SOAP) – Three-tier web-based GIS applications Architecture
  27. 27. Thank you Any Queries?

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