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Special Issue on Selected Papers from the Fifteenth International Symposium on Graph Drawing, GD 2007
DOI: 10.7155/jgaa.00190
DAGmaps: Space Filling Visualization of Directed Acyclic Graphs
Vol. 13, no. 3, pp. 319-347, 2009. Regular paper.
Abstract Gene Ontology information related to the biological role of genes is
organized in a hierarchical manner that can be represented by a
directed acyclic graph (DAG). Space filling visualizations, such as the treemaps,
have the capacity to display thousands of items legibly in
limited space via a two-dimensional rectangular map. Treemaps
have been used to visualize the Gene Ontology by first transforming
the DAG into a tree. However this transformation has several
undesirable effects such as producing trees with a large number of
nodes and scattering the rectangles associated with the duplicates
of a node around the display rectangle. In this paper we introduce the problem
of visualizing a DAG with space filling techniques without
converting it to a tree first,
we present two special cases of the problem,
and we discuss complexity issues.
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Submitted: January 2008.
Reviewed: April 2008.
Revised: August 2008.
Accepted: December 2008.
Final: January 2009.
Published: November 2009.
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