This document provides an introduction to information visualization and its role in knowledge discovery. It discusses the challenges of understanding large datasets and how information visualization techniques like scatter plots, maps, and interactive visualizations can help identify patterns, trends, outliers and support communication and discovery. Examples of information visualization tools and techniques are presented across different data types like temporal, hierarchical, and network data.

1. Informa(on
Visualiza(on
for
Knowledge
Discovery:
An
Introduc+on
Krist
Wongsuphasawat
Dept.
of
Computer
Science
&
Human-­‐Computer
Interac+on
Lab
University
of
Maryland
CP30
/
Intania
87

2. University
of
Maryland,
College
Park
Ò near
Washington,
DC

3. Where?

4. HCIL
Ò Human-­‐Computer
Interac+on
Lab
Ò hKp://www.cs.umd.edu/hcil/

5. HCI
Ò Human-­‐Computer
Interac+on
Ò A
discipline
concerned
with
the
analysis,
design,
implementa+on,
and
evalua+on
Ò of
interac+ve
compu+ng
systems
for
human
use
Design
Analysis
Implementation
Evaluation

6. Why
HCI?
Computer Abilities
Human Abilities
1950 1990 2030

7. HCI
Research
Ò Devices
É Touch
screen,
e-­‐Book
Reader,
Wii,
Natal,
Pen
É Mobile
Phone
Ò User
Interfaces
É for
collabora+on,
elderly,
children,
handicaps
É Query,
Zoomable
É …
Ò Design
Process
Ò Evalua+on
methods
Ò Informa(on
Visualiza(on
(Info.
Vis.)
Ò Etc.

8. Imagina(on

9. MicrosoK
Surface

10. Nintendo
Wii

11. Project
Natal

12. Mobile

13. Mobile

14. Amazon
Kindle

15. Interna(onal
Children
Digital
Library

16. GUI
for
elderly

17. Informa(on
Visualiza(on

18. Challenges
Ò Huge
amount
of
data
Ò How
to
understand
and
make
use
of
it?
Ò What
ques+on
to
ask?

19. Example

20. Challenges
Ò Iden+fy
É Trends
É PaKerns
É Outliers
Ò Goals
É Communica+on
É Discovery

21. The
eye...
the
window
of
the
soul,
is
the
principal
means
by
which
the
central
sense
can
most
completely
and
abundantly
appreciate
the
infinite
works
of
nature.
Leonardo
da
Vinci(1452
-­‐
1519)

22. The eye...
the window of the soul,
is the principal means
by which the central sense
can most completely and abundantly
appreciate the infinite works
of nature.
Leonardo da Vinci(1452 - 1519)

23. The eye...
the window of the soul,
is the principal means
by which the central sense
can most completely and abundantly
appreciate the infinite works
of nature.
Leonardo da Vinci(1452 - 1519)

28. Gestalt
Principles
hKp://psychology.about.com/od/sensa+onandpercep+on/ss/
gestaltlaws.htm

29. A picture is worth a thousand words.

30. Informa(on
Visualiza(on
Ò Provide
tools
that
present
data
in
a
way
to
help
people
understand
and
gain
insight
from
it.
Ò The
use
of
computer-­‐supported,
interac+ve,
visual
representa+ons
of
abstract
data
to
amplify
cogni+on.

31. Interdisciplinary
Ò human-­‐computer
interac+on,
Ò computer
science,
Ò graphics,
Ò visual
design,
Ò psychology,
Ò and
business
methods

32. Example

33. ScaTer
Plot

34. Correla(on…
What
else?

35. Outliers
He
Rn

36. John
Snow:
The
London
Cholera
Epidemic
of
1854

37. John
Snow:
The
London
Cholera
Epidemic
of
1854
Ò hKp://www.csiss.org/classics/content/8

38. Charles
Minard's
map
of
Napoleon's
march

40. The
growth
of
Facebook

41. Facebook
Ò Video

42. Informa(on
Visualiza(on:
Mantra
Ò Overview,
zoom
&
filter,
details-­‐on-­‐demand
Ò Overview,
zoom
&
filter,
details-­‐on-­‐demand
Ò Overview,
zoom
&
filter,
details-­‐on-­‐demand
Ò Overview,
zoom
&
filter,
details-­‐on-­‐demand
Ò Overview,
zoom
&
filter,
details-­‐on-­‐demand
Ò Overview,
zoom
&
filter,
details-­‐on-­‐demand
Ò Overview,
zoom
&
filter,
details-­‐on-­‐demand
Ò Overview,
zoom
&
filter,
details-­‐on-­‐demand
Ò Overview,
zoom
&
filter,
details-­‐on-­‐demand
Ò Overview,
zoom
&
filter,
details-­‐on-­‐demand

43. Treemap:
Stock
market,
clustered
by
industry
Map
of
the
Market
-­‐
hKp://www.smartmoney.com/map-­‐of-­‐the-­‐market/

44. Market
falls
steeply
Feb
27,
2007,
with
one
excep(on

45. Market
falls
311
points
July
26,
2007,
with
a
few
excep(ons

46. Market
mixed,
October
22,
2007,
Energy
&
Basic
Material
are
down

47. TimeSearcher
Ò Demo
Ò hKp://www.cs.umd.edu/hcil/+mesearcher

48. LifeLines

49. Traffic

50. Wordle:
Google’s
Corporate
Informa(on

51. Baby
NameVoyager
Ò hKp://www.babynamewizard.com/voyager

52. NetFlix
Rental
PaTerns
http://www.nytimes.com/interactive/2010/01/10/nyregion/20100110-netflix-map.html

53. NetFlix
(2)

54. NetFlix
(3)

55. NetFlix
(4)

56. SocialAc(on
Ò Video
Ò hKp://www.cs.umd.edu/hcil/socialac+on

57. Informa(on
Visualiza(on:
Data
Types
SciViz .
Ò 1-­‐D
Linear
Document
Lens,
SeeSo^,
Info
Mural,
Value
Bars
Ò 2-­‐D
Map
GIS,
ArcView,
PageMaker,
Medical
imagery
Ò 3-­‐D
World
CAD,
Medical,
Molecules,
Architecture
Ò Mul(-­‐Var
Parallel
Coordinates,
Spo_ire,
XGobi,
Visage,
Influence
Explorer,
TableLens,
InfoViz
DEVise
Ò Temporal
Perspec+ve
Wall,
LifeLines,
Lifestreams,
Project
Managers,
DataSpiral
Ò Tree
Cone/Cam/Hyperbolic,
TreeBrowser,
Treemap
Ò Network
Netmap,
netViz,
SeeNet,
BuKerfly,
Mul+-­‐trees
(Online
Library
of
Informa+on
Visualiza+on
Environments)
hKp://otal.umd.edu/Olive

58. ManyEyes:
A
web
sharing
plajorm
hKp://services.alphaworks.ibm.com/manyeyes/app

59. Conclusion
Ò Informa+on
Visualiza+on
É Provide
tools
that
present
data
in
a
way
to
help
people
understand
and
gain
insight
from
it.
É Applicable
to
various
domains
Ò More
info
É hKp://www.cs.umd.edu/hcil
É hKps://wiki.cs.umd.edu/cmsc734_09/
Ò Contact
É kristw@cs.umd.edu
É hKp://www.cs.umd.edu/~kristw
Ò Acknowledgement
É Ben
Shneiderman’s
slides
É Ben
Bederson’s
slides
É hKp://www.cs.umd.edu/hcil/pubs/presenta+ons/

60. Thank
you