Visualizing one or more trees/taxonomies with non-trivial number of characters and taxa is a challenge a number of projects is facing. The ETC project organized a workshop with information visualization experts, data providers (trees and characters), and end users to tackle the challenge together.
The meeting was organized by Hong Cui and hosted by Bertram Ludäscher in the National Center for Supercomputing Applications (NCSA), Urbana, IL, in May 11-13. Phenotype RCN participants Matt Yoder, Nico Franz and Martín Ramírez attended the meeting and posed vis challenges. Much of the workshop was devoted to brainstorm on the challenge of representing a large dataset together with some kind of mapping on a tree, and often on two trees simultaneously. This is a familiar challenge for anatomy ontologists, who are trying to represent the interaction of phylogenetic trees, matrices and ontologies:
The beautiful and clever examples presented by the vis experts were inspiring. How these gorgeous examples can help us represent or complex data in intuitive visualizations? Filters, sort controls, heat maps, zoom panes, collapsing, expanding, and more tools – all made in us two effects: Make some of our challenges look feasible, and refine our vague ideas into more precise challenges.
The ETC project will implement a few promising techniques as part of ETC toolkit to invite comments and suggestions from broader communities. Stay tuned, and crunch your data into nice visualizations!
(post by Martin Ramírez)