Visualization: 24 October 2012 Telecon

Presentation of VisKi by Nick Del Rio

PhD candidate, UTEP, El Paso

 

Advisor: Paulo Pinheiro, PNNL

 

VisKo: enabling visualization over the web

 

- not a new toolkit, a framework to register existing toolkits

 

Problem: sharing visualizations over the Web

- send an image

     - limitations: recipient can't adjust image to own needs

- send data

     - may be too big

     - recipient may not have skills, software or tools (supercomputer) to generate the image

- send URL of visualization embedded in view on web

     - only for specific domains like OGC for GIS

 

New Solution: VisKo

- pass a visualization query

- specification of visualization that can be generated over the web

 

DEMO:

(slides posted on web as well for DEMO)

- queries easy to share with people

- in view, if want to adjust parameters, can edit in query

- end-user still retains some control of the image

 

- enhanced usage of preferred toolkits

- if like NCL, if registered with VisKo can use it

- VisKo may also know of some other toolkits registered with it and can auto-generate visualizations using them for different image outputs

- run time of query is a little longer if don't specify the toolkit

 

Hybrid pipeline transforming data

Operator pipeline graph

- each node is a service

- snapshot of knowledge base

 

Joining VisKo: submit package to register with VisKo

- gives automated service discovery

- have a package template

 

Data

- if have data that you cannot visualize, need to register a service so can see it even if have to transform it through multiple services to get to that visualization

 

 

 

Discussion:

- helps data users use multiple toolkits, see data not completely familiar with

 

How generating RDF

- have to write module for it when submit package, part of the template

 

Can you subtmit a package like Matlab?

- licensing issue: might be able to get around if assured was only for use within organization

 

Can you output to a file? Or just a screen?

- depending on service

 

How handling provenance?

- when executes pipelines in VisKo, can execute with record of provenance

- returns query and PML query

- proof markup language

- RDF and ugly, not human consumption

- keeps execution trace

 

Can you use for general processing, without terminating in viewer?

- for general data processing have to register as a viewer

- benefits of having specific visualization viewer has termination point