Navigating Contextual Complexity with Graph Visualization
( a ) ( b )
Figure 2-2 : Bottom-up approach starting with a specific node . A context menu supports searching outward from the selected node .( a ) Loading connections expand the graph . ( b )
Middle-out navigation begins with some abstraction or simplified graph and supports moving to another representation layer . The beginning abstraction may be determined by an algorithm , or by domain-specific considerations . Middle-out navigation may be suited to browsing or indexing a large system , such as is often the case with a wiki or website navigation scheme .
Figure 2-3 : Middle-out navigation in a network where a clustering algorithm has been applied . A context menu supports drilling into the selected cluster .
Journal of Innovation 75