ArcJmp and Snap2

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ArcJmp and Snap2

• David DesJardins
• Census
• Chris North
• Department of Computer Science
• Virginia Tech

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Historical Context

• Snap-Together Visualization
• Dynamaps
• ArcJmp
• Snap2

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Dynamaps

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

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ArcJmp

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

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ArcJmp

• Implementation
• JMP 4
• MapObjects 2.1 (Shape files)
• VisualBasic
• Available for download
• http//infovis.cs.vt.edu/census/
• Future
• Data import
• MapObjects ? ArcView 8.1
• Link to Dynamaps

ActiveX API
ArcJmp
ActiveX API
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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)

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Flexibility Mismatch

• Databases
• Flexible
• Data schemas
• Non-programmers
• Rapid rate of change
• Lots

• UI / Visualization
• Brittle
• Code?
• Programmers
• Sloooow
• Few

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Snap1 User Interface

• 1. Load data into views

• 2. Link views together

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Census Scenario
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Census Scenario
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Relational Model ? Visualization

• View relation
• Item tuple
• Link join

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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

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More!

• Example Census on the web
• QuickFacts AFF

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Snap2

• Browser based, frames
• Save visualizations, post as single URL
• Developers upload components

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Visualization Schemas

• Analogous to data schema diagrams
• Visual language for Snap model

• Vis
• Data

action
join
action

• Vis
• Data

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DataCompass

• Where can I go from here?

• States

1M

• Vis Map
• Data Counties

• Counties

• County

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1M

• Tracts
• Metro Areas

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Software Architecture
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Future Datafaces

• Integrating data schemas visualization schemas
• Simultaneously manipulate data and UI

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Datafaces
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Datafaces
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Info

• Chris North
• http//infovis.cs.vt.edu/
• north_at_cs.vt.edu
• David DesJardins
• edaplus2_at_juno.com
• 301-292-5531
• ArcJmp
• Hands on session 130pm 3225-4
• Census contact Todd Williams (SRD) 301-457-4863
• Download http//infovis.cs.vt.edu/census/