GEOVISUALIZATION IN NEOGEOGRAPHY? TANMOY DAS MENNO-JAN KRAAK - - PowerPoint PPT Presentation

geovisualization in neogeography
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GEOVISUALIZATION IN NEOGEOGRAPHY? TANMOY DAS MENNO-JAN KRAAK - - PowerPoint PPT Presentation

GEOVISUALIZATION IN NEOGEOGRAPHY? TANMOY DAS MENNO-JAN KRAAK CONTENTS Introduction Terminology Potential Applications Problems Methods Conclusions INTRODUCTION Applications of Web 2.0 Photo & Video Blogs, Tweets


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SLIDE 1

GEOVISUALIZATION IN NEOGEOGRAPHY?

TANMOY DAS MENNO-JAN KRAAK

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SLIDE 2

CONTENTS

  • Introduction
  • Terminology
  • Potential Applications
  • Problems
  • Methods
  • Conclusions
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SLIDE 3

INTRODUCTION

User-Generated Content (UGC) User-Generated Geo-Content (UGGC)

+ Location

Blogs, Tweets Blogger, Twitter Social Networking Facebook, Orkut Wikis Wikipedia, WikiTravel Community Mapping Google Map, OSM Tagging Tag Maps, Geonames Photo & Video Sharing Flickr & YouTube

Applications of Web 2.0

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SLIDE 4

TERMINOLOGY

Map Mashup Top Layer(s) UGGC Base Layer(s) Base Map

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SLIDE 5

POTENTIAL APPLICATIONS

Global Patchwork Environmental Monitoring Citizen Science Disaster Response

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PROBLEMS

  • Credibility & Quality
  • Geovisualization

a) Base Layer (s) b) Top Layer (s)

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SLIDE 7

METHODS

Summarizing

GeoVis

  • Neo. Map 1A

Method 1

  • Neo. Map 1B
  • Neo. Map 2A

Method 2

  • Neo. Map 2B

Compare Compare

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SLIDE 8

METHOD 1 & RESULT

K-means Spatial Clustering on Flickr Data from Enschede, Netherlands

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SLIDE 9

METHOD 2 & RESULT

S-T Clustering using Kulldorf’s Scan Statistics on Swine Flu Data from USA

  • Locations of swine

flu recorded

  • ‘Time’ attribute
  • No ‘spatial’ and

‘temporal’ pattern

  • Space-Time Clusters
  • Size indicates

cluster’s radius

  • Colour indicates

time period

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SLIDE 10

CONCLUSIONS

  • Not trusted due to poor geovisulization and lack of credibility &

quality

  • Neogeography maps are cluttered at certain scale (zoom level)
  • Clustering might be one of solutions to remove clutter
  • Both Space and S-T clustering can be used

 Limitations of Clustering  Improved GeoVis does not solve the problem of credibility & quality User’s requirement analysis is required Clustering techniques are professional. Challenge is to implement them within neogeography domain.

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SLIDE 11