Design Guidelines for VE Landmarks

Ware's derived guidelines
enough so always can see some
visually distinguishable from others
visible and recognizeable at all scales
placed at major paths/junctions
others, only some of of these crossover for infovis!	
need all 5 types of landmarks
path,edge,district,node,landmark
concrete not abstract
asymmetry: different sides looks different
clumps
different from "data objects"
need grid structure, alignment

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