Supervision and control of wide area transportation networks requires
continuous monitoring of targe data sets. Two factors complicate the p
rocess: data items are spread over a wide geographic area, but are rec
iprocally influenced through network links, and data types attached to
network nodes belong to different categories. We describe a visualiza
tion environment that tests the joint use of multiple presentation mod
es, such as 3D graphics, color, and windowing, to address both factors
.