NCSA Easyviz Databridge

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NCSA Easyviz / Databridge

• REVITALISE Workshop
• June 20, 2005

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Agenda

• Review of Concepts Scatter vs. Uniform
• Activity A
• Activity B

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NCSA Easyviz

• VTK Uniform
• Isosurfaces, Orthoslices, Measurement Tools

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NCSA Data Bridge

• Input Dataset
• Output to EasyViz, AVS, or other VTK
  Visualization Tool (Paraview)

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Scatter Data

• A type of data set in which the points are not
  laid out evenly on a grid.
• For example, when one takes a handful of
  pennies, throws them into a fountain and measures
  the temperature at the location of every penny,
  the person is creating a scatter data set.

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More on Scatter Data

• Since scatter data is not on a grid, each point
  must have a set of coordinates (x, y, z)
  associated with it.

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Uniform Data

• A type of data set where the measurements are
  equally spaced (as a grid).
• For example, if you take a chess board, and
  consider each square having a value, you have a
  uniform data set.

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What If

• your scatter data is evenly spaced, which
  implies the data is in a grid?
• For our purposes with Easyviz and Databridge, we
  consider this data as scatter data even though it
  has the properties of a uniform data set.

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In Short

• If your dataset has coordinates explicitly
  associated with each data point, it is scatter.
• If your dataset has no coordinates explicitly
  associated with each data point, it is uniform.