The most popular method of drawing directed graphs is to place vertices on a set of horizontal or concentric levels, known as level …

In drawings of hierarchical graphs generated by the conventional Sugiyama framework the vertices are positioned on multiple horizontal …

In radial drawings of hierarchical graphs the vertices are drawn on concentric circles instead of on horizontal lines as in the …

Clustered graphs are an enhanced graph model with a recursive clustering of the vertices according to a given nesting relation. This …