How can I generate a directionality attribute between two points along a route/line?
Currently I am using Network Analyst to determine closest facilities, but I need a direction (upstream/downstream) along the route from incidents to facilities. Below is a visual example. The attribute I am trying to generate would be the direction ("Upstream") along the route you would have to travel to get from A to B. It should be noted that A and B are different features of different feature classes.
I am somewhat new to Network Analyst. Also, I am open to using methods other than Network Analyst.