Flow maps show a linear movement between places.
Flow maps are also called dynamic maps or linear cartograms . Flow maps often apply lines or bands and the width of such features indicates the quantitative component of the flow. Arrowheads are often placed at the end of the flow-representing lines to indicate the direction of the flow. Due to the complex nature of the flow maps most of the symbols on them are highly generalized. Hence, one cannot easily distinguish the actual course of the flow, but rather its general path.