Have an attribute that indicates the flow direction, whether it be with, against, or undetermined digitization, and then represent on that attribute with an arrow in one direction, an arrow in the other direction, or a circle. This will add an additional layer of complexity.
Have an attribute that indicates the flow direction, whether it be with, against, or undetermined digitization, and then represent on that attribute with an arrow in one direction, an arrow in the other direction, or a circle. This will add an additional layer of complexity.