[GIS] How to create arrows lines automatically on ArcGIS, for a thematic map of directed flux

arcgis-desktopflow-mapline

I need to create a map with the Import and Export Flux between countries. I have the needed data in my table. But I wish to know if there is any tool or extension which will allow me to create those lines or arrows automatically (similar to how we do with labels, but those create words, which organize themselves in the Data Frame).

For that all I should do is to indicate lineament of origin and destination, representing the seaports.

I need to do something like this, but with arrows:

Sample Flux Map

Best Answer

There is a distributive flow tool available in the applications prototype lab.
Here is a blog and some links and data.
Even if you are not looking for this.
I like it so here.
Dist flow

Credit: Brad Simantel
With your edit addition to the question I will add this link for placing line decorations with code.
If you desire more help on using arrows add to your question and I can provide some detail.

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ArcGIS Network Analyst – Calculating Optimal Routes While Touching All Available Roads

I think some of the answer depends on the layout of the road network, and this question might be worth posting on the Math Stack Exchange (https://math.stackexchange.com/) as it seems like a graph theory problem. I don't think this will be the optimal solution, but it might help get you closer.

You could divide up the road network into natural regions, where the sum of the length of the segments will be roughly equal to the amount that a truck could cover with a given load. Then for each region you could run a eularian tour to get the route that would touch all of the segments. Sample python code

def eulerian_tour(network_graph):
    graph = network_graph[:]
    route = []
    def find_route(start):
        for (i, j) in graph:
            if i == start:
                graph.remove((i, j))
                find_route(j)
            elif j == start:
                graph.remove((i, j))
                find_route(i)
        route.append(start)

    find_route(graph[0][0])
    route.reverse()
    return route

You might then consider routing between regions and the depot, and break up the access route into logical segments for the trucks available. Hope this helps.

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I was able to copy the scale bar I wanted to use, activate the data frame I needed it for, then paste. The new one retains all the formatting of the old. You can then set aside or delete the old one.

Best Answer

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