Fig. 1: Comparison of non-spatial and spatial directionality.
From: Unravelling the spatial directionality of urban mobility
a Shows an origin-destination (OD) matrix for locations A to E, illustrating non-spatial directionality where the lack of spatial information allows for various potential flow directions. b Shows spatial directionality, starting with a diagram of the locations and potential paths (top left), followed by actual flow directions with arrow thickness indicating volume (top right). The bottom-left diagram shows spatial directionality relative to true north, with colours shifting from red (aligned with true north) to blue (opposite direction). Similar colours for flows from A to C and A to D indicate parallel spatial orientations. The bottom-right diagram visualises spatial directionality towards the city centre, with red indicating closer alignment and blue the opposite. This reveals that the flow from A to C aligns more towards the city centre than the flow from A to B.
