History and Principles of Data Visualization (CMSC 34900-1 Topics - - PowerPoint PPT Presentation
History and Principles of Data Visualization (CMSC 34900-1 Topics in Scientific Computing; Autumn 2014) http://people.cs.uchicago.edu/~glk/class/HistoVis/ Oct 2, 2014 Gordon Kindlmann Admin stuff Sign up for Piazza! will use for
what's the context/motivation for making a visualization? medicine/epidemiology Snow's Cholera map science (counter)clockwise rotation around high/lo pressure meteorology military building, construction engineering money insurance taxes (also political) politics census What are ingredients in a visualization? careful layout of intrisically spatial and non-spatial values e.g. tickmarks on cholera map graphical abstraction/representation
color discrete colors for categories area of circle/square
nec.y parameters Fig 12
e.g. ticks paths/lines/curves to indicate isometric/isocontour/isotherm of value over space suggestion of continuity in value btw 2 ordinates association between discrete entities areal units (either boundary or value within is basis for inferrence) mapping quantities to 2D space on page categorical
continuous what's the purpose
enable visual evaluation of functions nomogram: explore function and its args better "lookup" into table discern noise from signal enabling comparisons highlight interesting features manifolds on which data lives clusters relationships trends wrt time
what is data visualization? (we will revisit this throughout the quarter) "graphical representation of data"