  Wayfinding behavior and pedestrian movement pattern research relies on
objective spatial configuration representation and analysis, such as space
syntax, to quantify and control for the difficulty of wayfinding in multi-level
buildings and urban built environments. However, the space syntax's
representation oversimplifies multi-level vertical connections. The more recent
segment and angular approaches to space syntax remain un-operationalizable in
three dimensional space. The two dimensional axial-map and segment map line
representations are reviewed to determine their extension to a novel three
dimensional space line representation. Using an extreme case study research
strategy, four representations of a large scale complex multi-level outdoor and
indoor built environment are tested against observed pedestrian movement
patterns N = 17,307. Association with the movement pattern increases steadily
as the representation increases toward high three-dimensional space level of
definition and completeness. A novel hybrid angular-Euclidean analysis was used
for the objective description of three dimensional built environment
complexity. The results suggest that pedestrian wayfinding and movement pattern
research in a multi-level built environment should include interdependent
outdoor and indoor, and use full three-dimensioanal line representation.
