topic Re: Preserve First & Last stop sequence - Network Analysis -Route in ArcGIS Network Analyst Questions

Preserve First & Last stop sequence - Network Analysis -Route

RTMRTM — Fri, 12 Apr 2024 17:55:00 GMT

"I need to solve a route, but I need it to follow both the first and last stop I set. When I run the tool, it only follows the instruction of the departure but not of the last stop. Can you help me with this issue?"

Re: Preserve First & Last stop sequence - Network Analysis -Route

JaySandhu — Fri, 12 Apr 2024 18:31:00 GMT

So what is happening to the last stop? Is it not the last stop? Or it is not reached? It is not clear what issue you have and the screen shot does not show anything meaningful. Please post some more details. Thanks,

Jay Sandhu

Re: Preserve First & Last stop sequence - Network Analysis -Route

RTMRTM — Fri, 12 Apr 2024 18:37:20 GMT

The stop that I defined as the last one is placed as the third to last or in the middle instead of being the last

Re: Preserve First & Last stop sequence - Network Analysis -Route

JaySandhu — Fri, 12 Apr 2024 18:56:22 GMT

How are you defining the last stop? Initially it is the order in which they are added but after some solves you have to set the sequence numbers to specify the first and last stops.

Jay Sandhu

Re: Preserve First & Last stop sequence - Network Analysis -Route

RTMRTM — Fri, 12 Apr 2024 19:10:15 GMT

When loading the stops, in my layer, I have a field defined where one record has a value of 1 representing my starting point, and another record with the total number of records representing the end

Re: Preserve First & Last stop sequence - Network Analysis -Route

JaySandhu — Fri, 12 Apr 2024 19:17:35 GMT

The route solve looks at the Sequence field. It cannot be any field, unless you load that field information to the Sequence Field on the Stops attribute table.

Jay Sandhu

Re: Preserve First & Last stop sequence - Network Analysis -Route

JaySandhu — Fri, 12 Apr 2024 19:22:05 GMT

Also, you cannot have null values for the other stops. If you are using a sequence field, then all stops should have a non-null value.

Jay Sandhu

Re: Preserve First & Last stop sequence - Network Analysis -Route

RTMRTM — Fri, 12 Apr 2024 20:41:57 GMT

Even though I only need the departure and arrival records as references, I want Network Analysis to automatically handle the rest of the values as null?

Re: Preserve First & Last stop sequence - Network Analysis -Route

JaySandhu — Fri, 12 Apr 2024 21:28:16 GMT

With preserve first and last option, only the lowest and highest sequence stops are considered as first and last. The others are re-sequenced.

Jay Sandhu

Re: Preserve First & Last stop sequence - Network Analysis -Route

JohnGuilfoyle — Mon, 03 Mar 2025 04:22:04 GMT

I'm just learning ArcGIS Pro and having trouble with this concept. When the stops are imported, the system assigns a sequence. I pick my starting point and assign Stop 118 as the first stop, so I change its sequence in the Attribute Table to 1. Then I choose my end stop and change its sequence to the highest number possible, 199. When I run the Analysis, my chosen final stop becomes 109. Do I have to change the original highest stop to 109 after changing 109 to 199?
ArcMap automatically updated sequences, and I cannot find the proper document or video that explains this.