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Simulation, Surveys and Visualisation : From GeoVue to GENeSIS

Simulation, Surveys and Visualisation : From GeoVue to GENeSIS.

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Simulation, Surveys and Visualisation : From GeoVue to GENeSIS

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  1. Simulation, Surveys and Visualisation : From GeoVue to GENeSIS The seminar is split into two distinct halves, firstly it explores the use of MapTube from the GeoVue project for crowd sourced surveys, notably for mapping the Credit Crunch for BBC Radio 4 PM show and Anti-Social behaviour with BBC Look East. We take a look at methods and techniques of crowd soucing as well as a look at the future of the MapTube concept with the intergration of Open Layers and Open StreetMap. Secondly we look at the latest work out of the follow on grant from GeoVue known as GENeSIS, we take a look at methods and techniques for modelliing agent based behaviours in a 3D world, moving towards a populated SimCity for Real. Andrew Hudson-Smith Richard Milton University College London http://www.casa.ucl.ac.uk

  2. GeoVUE Family Tree GeoVUE GMapCreator Second Life Google Image Tools Virtual London GMapImageCutter Photo Overlay Creator Shape Builder MapTube GEarth Creator Big Image Cutter BayScience London Profiler Mood Maps

  3. Image Cutter Fine Art, Ancient Greek Manuscripts and Creatures? It’s a zero-install option http://chs75.harvard.edu/manuscripts/ http://www.thekremercollection.com/art/

  4. 23,475 responses April, May, June 2008 A new credit crunch survey started in October and currently has 3,802 responses. http://www.maptube.org/creditcrunch/

  5. Real-time Mood Maps What single factor is hurting you most about the credit crunch? Database Fuel Script Create Shapefile Postcodes GMapCreator

  6. BBC Look East: Anti-Social Behaviour July, August, September 2008 6,902 responses http://www.maptube.org/lookeast

  7. September 2008 2,052 responses (with age group) BBC Look East: Credit Crunch http://www.maptube.org/LookEastCreditCrunch/

  8. Manchester Congestion Charge 15,902 responses October to December 2008

  9. Manchester Unit Postcode Data Of the 15,902 responses, 90% gave the full unit postcode. Movie

  10. How to Manipulate an Online Survey Just keep putting the same answer in for one postcode, or a group of postcodes SELECT DISTINCT UserHostAddress FROM Answers and build a map... Exhibit A: A map of only the duplicate records, showing the colour of the class with the most votes.

  11. How Not to Manipulate an Online Survey Counts of “Drive and Pay the Charge” Counts of “Use Public Transport” 0-20 20-30 30-40 40-50 50+

  12. How Not to Manipulate an Online Survey Counts of “Work or Shop Elsewhere” So how do you manipulate it? Feed the form data to the server directly Spoof the return address in the TCP packet 0-20 20-30 30-40 40-50 50+

  13. Labelling Maps • Labels are drawn over the correct feature (crescent shapes) • Features have an order of importance • No two labels may overlap • When a label becomes visible at a particular zoom level, it must be on all subsequent zoom levels

  14. How Does MapTube Work? It uses the map IDs to obtain XML data describing the map layers and uses XSLT to transform this representation into the xhtml page you see here.

  15. Request, Render, Cache Cache Lookup Hit Request Miss Render Data

  16. Selective Cache Flushing Throw away what has changed and keep the rest. We’re currently creating about 66,000 tiles and hour.

  17. On the Fly Rendering and Caching Write a renderer for the weather data which is derived from the base renderer class. Then write a generic web handler that creates a tile cache with it. It’s Sunday, it’s overcast and it’s raining heavily in London. At least I’m not in Eastbourne though, as they had sleet recently. 12Z October 26th 2008

  18. Web GIS and Interactivity Manchester Congestion Charge Attribute Data Fid 1510 District M41 MaxClass 3 Total 349 PCTDrivePay 20.63 PCTDiffTimes 18.62 PCTPublicTrans 11.75 PCTElsewhere 44.13 PCTNotAffected 4.87 Display Tile Feature Tile (links every pixel to a unique feature ID code) Feature XML File (one for every feature)

  19. Future Technologies for Genesis • More Interactivity and Models (data you can play with) • Open Layers (be Google and Microsoft free) • Flash/flex based Web GIS (for small datasets) • Google Apps (for when you need 2000 servers) • Google Native Client Demo1, Demo2

  20. GeoVUE has now moved to GENeSIS We’re looking at visualising agent-based models and simulation Conway’s Game of Life Toru Iwatani’s Pac-Man, circa 1980

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