topic Network Analyst Flip Line direction by Order Sequence in ArcGIS Network Analyst Questions

Network Analyst Flip Line direction by Order Sequence

DevinUnderwood3 — Mon, 16 Apr 2018 15:06:41 GMT

I want to flip all route lines according to the orders sequence numbers.

I would then show arrows with the correct direction of travel.

I tried using the Sort tool to resort records according to the sequence number. I must be mistaken that it does not resort/flip the lines and direction.

Is there a possible way to accomplish what I am attempting to do ?

Thank You.

Re: Network Analyst Flip Line direction by Order Sequence

DanPatterson_Retired — Mon, 16 Apr 2018 15:27:43 GMT

What did you sort on? Sorting on the geometry won't flip lines.

Flip does is you have an advanced or standard licence http://pro.arcgis.com/en/pro-app/tool-reference/editing/flip-line.htm

Re: Network Analyst Flip Line direction by Order Sequence

DevinUnderwood3 — Mon, 16 Apr 2018 15:31:07 GMT

I am using ArcMap and have advanced license, manual flipping one by one works fine.

I sorted on sequence numbers I obtained from routing orders.

Re: Network Analyst Flip Line direction by Order Sequence

DanPatterson_Retired — Mon, 16 Apr 2018 15:43:54 GMT

sorting on sequence numbers will just sort on those numbers, but as you well know, it does nothing to the geometry

Re: Network Analyst Flip Line direction by Order Sequence

DevinUnderwood3 — Mon, 16 Apr 2018 17:31:18 GMT

Thanks for the feedback, I will have to take another approach.

Re: Network Analyst Flip Line direction by Order Sequence

XanderBakker — Mon, 16 Apr 2018 17:35:21 GMT

Flip is the way to go as Dan already mentioned. Just some side notes:

The tool will modify the input featureclass (so perhaps use a copy to test it on)
It works with selections. If you can select all the elements that need to be flipped, the tool will only change those.

Re: Network Analyst Flip Line direction by Order Sequence

DevinUnderwood3 — Mon, 16 Apr 2018 17:38:44 GMT

I agree and have performed these steps for flipping a line, it is not a practical solution for every line.

Re: Network Analyst Flip Line direction by Order Sequence

DanPatterson_Retired — Mon, 16 Apr 2018 17:43:04 GMT

An alternative then is to use the reversed arrow symbology... it will draw in the opposite direction to that in which it was digitized.

Re: Network Analyst Flip Line direction by Order Sequence

XanderBakker — Mon, 16 Apr 2018 17:46:58 GMT

I was referring to creating a selection of all the features that require flipping and apply the tool once to flip all those features. In case you can't use the attributes to define that selection, probably a bit of code could do the trick. I have done similar things in the past. Can you share a small part of your data and indicate which attribute you use to define the order of the segments?

Re: Network Analyst Flip Line direction by Order Sequence

JaySandhu — Thu, 19 Apr 2018 18:36:34 GMT

>I want to flip all route lines according to the orders sequence numbers.

The output route from a route or VRP is a single feature class (per route) and it is already oriented in the direction of the orders sequence numbers. I do not understand your use case to "flip" these.

Jay Sandhu

Re: Network Analyst Flip Line direction by Order Sequence

DevinUnderwood2 — Thu, 19 Apr 2018 18:44:05 GMT

Correct, it is a single feature class that I want to be split into each road segment to display the directionality of the route.

This isn't the case, when I split the route it inherits the directionality of digitized lines.

Re: Network Analyst Flip Line direction by Order Sequence

JaySandhu — Thu, 19 Apr 2018 19:01:05 GMT

I am not sure how a "split" of an existing line will flip parts of that line into different directions.

But, you may want to try using the Copy Traversed Source Features tool right after you solve the NA layer. It will generate all the edges that were traversed by that route and each line should be pointing into the way it was traversed by the route.

Copy Traversed Source Features—Help | ArcGIS Desktop

Jay Sandhu

Re: Network Analyst Flip Line direction by Order Sequence

DevinUnderwood2 — Thu, 19 Apr 2018 20:22:57 GMT

Thank you, it worked.

I also set the symbology to an offset so both sides of the road is showing the travel route path with arrows.

Now, I want to show route segments that do not have orders as a different grey color for example, denoting that it isn't an actual order segment.

Re: Network Analyst Flip Line direction by Order Sequence

JaySandhu — Thu, 19 Apr 2018 20:34:48 GMT

Glad that worked.

Generally speaking, in the output Edges feature class (output of the Copy Traversed tool), any edge that had an order will be split at the order. So one of it's FromPosition or ToPosition will not be 0 or 1. You could select all those edges where the FromPosition is 0 and ToPosition is 1 OR FromPosition is 1 and ToPosition is 0. These will be edges with no orders and you can symbolize differently.

Or you could do a spatial selection of all the Edges with the orders (within a small spatial tolerance) and then reverse the selection.

Jay Sandhu