Closest Facilities Missing Routes

[Tim_C]

Hi there,

I'm trying to calculate shortest route from a centroid, along a road network, to nearest bike path, and I'm having an interesting issue with the Closest Facility Analysis tool: 

I have 125 081 Facility points (points along a cycling network)

I have 10 272 Incident points (population-weighted dissemination area centroids)

I have a municipal road network (which I have built and forced full rebuilds to see if this was the issue)

When loading the facilities and incident points I used exaggerated search tolerances (100 kilometres to make sure this isn't the issue), unchecked the append option, and allow automatic relocating at solve time.

Everything loads properly, but when I run the tool (direction: away from facility, Facilities: 1, no cutoffs, not using time, Along network), I only get 10 259 routes out of 10 272. 

I joined the route table to the centroid table to identify the centroids without routes, and when I locate these centroids I can't figure out why the tool wouldn't calculate a route for them. I've attached an image of an area with several centroids that are missing routes.

Anyone ever experience this, or have any recommendations?

Thank you,

Tim

[DanPatterson]

I moved your post to the network analyst questions section of Community... a better chance of getting an answer here

[Tim_C]

Ok, thank you Dan!

[MelindaMorang]

Did the Closest Facility solve generate any warning messages like ‘No "Facilities" found for "Unnamed (ObjectID = 1)" in "Incidents".’?

I suspect the facilities may be on parts of the network that are disconnected from the rest of the network due to some sort of connectivity problem.  Check whether the roads they're located on are properly connected to the surrounding roads.  You can use the Explore Network tool to click on roads to see what other roads they're connected to.

It could also be a problem with a one-way street being incorrectly configured, or a turn restriction preventing travel through an intersection, if you're modeling turns.

[Tim_C]

Hi Melinda, the analysis tool did not generate any warning messages. I will play around with the Network Explore tool, and update you if I find anything.

Thank you for your help!  🙂

[Tim_C · Accepted solution]

Hi Melinda, so after I bit of research and digging around (Network Dataset Properties >>> Source settings >>> Group Connectivity), I changed the connectivity policy from End Vertex to Any Vertex (and rebuilt the network), and that solved my issue. I am now the proud owner of 10 272 routes!