1. Department of Computer Science
ArcJmp and Snap2
David DesJardins
Census
Chris North
Department of Computer Science
Virginia Tech
ab for nformation isualization and valuation L I V E

2. Historical Context
Snap-Together Visualization
Dynamaps
ArcJmp
Snap2

3. Dynamaps Snap spin-off Goals: Future: North (UMD, Census)
External users
Data discovery
Census cd-rom products e.g. Counties USA?
Petkunas (Census)
Future:
Web version
UMD

4. ArcJmp Goals: Census internal users Analysts, power users
SAS JMP statistical and exploratory data analysis
ESRI ArcView geography (MapObjects)
North, DesJardins, Williams (Census)

5. ArcJmp Implementation: Available for download Future: JMP 4
MapObjects 2.1 (Shape files)
VisualBasic
Available for download
Future:
Data import
MapObjects → ArcView 8.1
Link to Dynamaps
ActiveX API
ArcJmp
ActiveX API

6. Snap-Together Visualization
Initial Goals
Users link tools on the fly
Flexibility
Users, non-programmers
Extensible, leverage 3rd party components
Snap1
North (UMD, Census)
Snap2
North (VaTech)

7. Flexibility Mismatch Databases UI / Visualization Flexible
Data schemas
Non-programmers
Rapid rate of change
Lots
UI / Visualization
Brittle
Code?
Programmers
Sloooow
Few

8. Snap1 User Interface
1. Load data into views
2. Link views together

9. Census Scenario

10. Census Scenario

33. Relational Model → Visualization
View = relation
Item = tuple
Link = join

34. Problems / Additional Goals
Universal Visualization Server
User Interface:
Collaboration: publishing and sharing data
Web, universal
User interface for linking
Window management
Architecture:
Runtime extensible, repository
Technology independent?
Local or remote databases

35. More!
Example: Census on the web
QuickFacts AFF

36. Snap2 Browser based, frames Save visualizations, post as single URL
Developers upload components

37. Visualization Schemas
Analogous to data schema diagrams
Visual language for Snap model
Vis
Data
action
join
action
Vis
Data

38. DataCompass “Where can I go from here?” States 1:M Vis: Map
Data: Counties
County
Counties
1:1
1:1
1:M
Tracts
Metro Areas

39. Software Architecture

40. Future: “Datafaces” Integrating data schemas + visualization schemas
Simultaneously manipulate data and UI

41. Datafaces

42. Datafaces

43. Info Chris North David DesJardins ArcJmp: http://infovis.cs.vt.edu/
David DesJardins
ArcJmp:
Hands on session: 1:30pm
Census contact: Todd Williams (SRD)
Download: