interactive visualization of statistical information
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Interactive visualization of statistical information
OECD / ISTAT Seminar on
Dynamic Graphics for Presenting Statistical Indicators
Rome, 5 – 6 March 2007
Hans-Joachim MittagUniversity of Hagen, Germany
joachim.mittag@fernuni-hagen.dewww.fernuni-hagen.de/jmittag/en
Interactive visualization of statistical information
1. Starting point:
The multimedia project “New Statistics”
2. Applications to official statistics Dynamic data presentation Interactive publication
3. Outlook Combining data and interactive maps
Virtual libraries for the public
1. Starting point: The multimedia project “New Statistics”
E-learning project for statistics education funded by the German government (until 2004)
Consortium of 10 German universities Covers all topics of an introductory statistics course Goal: Improving the quality of statistics education
→ www.fernuni-hagen.de/newstatistics
1. Starting point: The multimedia project “New Statistics”
Development of e-learning modules for statistics education (mainly for use at universities)
Pillars of the e-modules: Statistical Lab:
ad-hoc analyses of user-defined data sets
Animations (Flash): explanation of
statistical theory
Case studies: “Real” life problems / data sets from
different sciences
Interactive experiments and simulations (Java):
“trying out” statistical methods
→ www.fernuni-hagen.de/newstatistics
Java applets: link “Library ..“ Publications: link „Project-related ..“
1. Starting point: The multimedia project “New Statistics”
Examples (interactive visualization of statistical theory)
Virtual coin experiment: “Playing“ with distribution parameters:
→ Illustration
2. Applications to official statistics
Transfer: Educational world → Official statistics
Statistics education:Interactive experiments / simulations
(user-controlled exploration of statistical methods)
Official statistics:Interactive visualization of data / indicators(user-controlled exploration of data sets)
→
Examples (interactive visualization of data sets):
Unemployment rates in Europe
European e-Business Index
2. Applications to official statistics
Examples (interactive visualization of data sets):
Capital-city regions
Gross earnings in Europe
2. Applications to official statistics
→ Illustration
2 . Applications to official statistics
Design principles for interactive data visualization
Design as self-contained mini learning worlds Example: Start with graphical data presentation but do not hide numerical information and meta data
Support user-controlled data exploration Example: Provision of different graphical instruments enabling the
user to discover key information behind the data
Avoid information overload and superficial show effects Examples: not too many graphs simultaneously,
cautious use of colours, no blinking data points
2 . Applications to official statistics
Why Java-based? Usually no “plug-in” needed
Standardized programming, use of class libraries
Platform independence, online and offline use possible
Almost unlimited technical possibilities:
animation (dynamic pyramids), inclusion of interactive maps combination with content based on other platforms (Flash, SVG), database connection
2 . Applications to official statistics
Stand-alone use of Java applets: Online:
Via Web sites of statistical offices
http://forum.europa.eu.int/irc/dsis/wages/info/data/index.htm
Offline:
Dynamic PowerPoint presentation (press conferences)
CD-ROMs / DVDs complementing printed publications
Example: Eurostat Yearbook on Regions 2003
2 . Applications to official statistics
Use of Java applets as part of Web publications:
Added value of interactivity
2 . Applications to official statistics
Use of Java applets as part of Web publications (cont.):
http://forum.europa.eu.int/irc/dsis/wages/info/data/interactive.htm
→ Illustration
3 . Outlook
The approach presented is only a starting point for further development
and refinement, preferably with experienced partners.
Next steps:
• Interface “large database – Java applets” (automatic updating)
• Integration of export and print functionalities
• Combination of Java and SVG developments
• Animation of Java applets as long as animation contributes to a better understanding of the data
• Virtual libraries containing elements for data visualization (in particular: “eye-catcher” based on international data)
3 . Outlook
Virtual libraries containing elements for interactive data visualization sharing between different content providers (national
/ supranational statistical offices, educational institutions); use for statistical training
“Eye-catcher” based on international data
Examples:
Interactive graphs for key indicators
Dynamic maps + information on indicators
Animated presentation of indicators over time Interactive online publications for the public
Web links:
http://www.fernuni-hagen.de/newstatistics
→ Path “Library .. / Official statistics”
http://forum.europa.eu.int/Public/irc/dsis/wages/information
→ Link “Interactive visualization of statistical information” → Link “Interactive publications”
Cooperation partners wanted !
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