Robertson & De Ferrari

Systematic approaches to visualization:
is a reference model needed ?

This text is partially taken from [ROB94]

A reference model is a general visualization model

  1. to show an abstract description of the visualization process
  2. to describe the components
  3. which is independent from

"The lack of a clear reference model, within which the scope and limitations of existing tools and systems can be identified, makes it difficult to design improved approaches in a systematic manner. The task of generating robust default visualizations of data under exploratory or directed investigation, or automating the production of such defaults and assisting the user to refine them, relies on having 'standard' representations that satisfy established or specified criteria for interpretation. This task also points to the need for a reference model that is formalized."

Robertson and DeFerrari describe six components of a visualization system that define its quality: data model, visualization specification, visualization representation, matching procedure, visualization display and interaction.

An integrated visualization model

An integrated visualization model [ROB94]


Data model:


Visualization specification:

Two main forms:

  1. user directives (e.g. don't show variable X)
  2. interpretation aims (e.g. show local trends for variable X)

Visualization representation:

A formalism to subscribe the characteristics of many possible visual representations.


Matching procedure:

Given are the three components (1-3):

  1. data described according to the data model
  2. visualization specification (user directives, interpretation aims)
  3. formal description of available representations

Find a displayable visualization in consideration of these three components


Visualization display

A visualization representation device


Interaction


Visualization Concepts

Last modified on February 11, 1999, G. Scott Owen, owen@siggraph.org