topic Re: Service Area Analysis - different results in ArcMap vs ArcPro ? in ArcGIS Pro Questions

Service Area Analysis - different results in ArcMap vs ArcPro ?

SonaSunny — Fri, 12 Apr 2019 15:47:38 GMT

I am trying to create a 2.5 mile service area around all the fire stations with Ladder Trucks. I ran the analysis in ArcMap and in Pro, using the same settings. But the results don't match. The Line generated matches but not the polygons. For example , the screen shot below shows the service area polygons and Line created in Pro (green) and ArcMap(blue) . There are no line generated in the area highlighted in the middle, but the ArcGIS Pro generated service area polygon covers that area. Also, the service area polygon for station 45 looks so different in Pro vs ArcMap even though the line generated are the same.-

ArcMap

Any idea what could be causing this ? Is ArcGIS Pro more accurate than ArcMap?

Re: Service Area Analysis - different results in ArcMap vs ArcPro ?

KoryKramer — Fri, 12 Apr 2019 17:25:28 GMT

Network Analyst‌ Melinda Morang‌

Re: Service Area Analysis - different results in ArcMap vs ArcPro ?

DylanHarwell — Fri, 12 Apr 2019 17:29:01 GMT

I do this exact analysis for our Fire Department and I just noticed this the other day! Same settings, same station locations, same streets network, different polygons! Kind of troubling eh..

Re: Service Area Analysis - different results in ArcMap vs ArcPro ?

JaySandhu — Fri, 12 Apr 2019 17:31:58 GMT

What settings were used in ArcMap and Pro? Default? Do note that by default, ArcGIS Pro does Standard Precision and not Generalized. In ArcMap, the default setting is Generalized.

Re: Service Area Analysis - different results in ArcMap vs ArcPro ?

DylanHarwell — Fri, 12 Apr 2019 17:35:55 GMT

I've compared both and the polygons still were slightly different. Not as radically different as in this example though.

Re: Service Area Analysis - different results in ArcMap vs ArcPro ?

SonaSunny — Fri, 12 Apr 2019 19:19:02 GMT

The above example is - Generalized in ArcMap and High Precision in ArcPro. I tried the std precision in Pro with the generalized in ArcMap and that also was different .

Re: Service Area Analysis - different results in ArcMap vs ArcPro ?

SonaSunny — Fri, 12 Apr 2019 19:20:06 GMT

The travel Mode - i changed to Trucking in Pro. Didn't see anything for that in ArcMap.

Re: Service Area Analysis - different results in ArcMap vs ArcPro ?

SonaSunny — Fri, 12 Apr 2019 19:21:06 GMT

Did you then go with the ArcMap polygon or decide to use the ArcGIS Pro service area polygons? 🙂

Re: Service Area Analysis - different results in ArcMap vs ArcPro ?

DylanHarwell — Fri, 12 Apr 2019 19:28:39 GMT

I decided to just do it all in Pro from now on to stay consistent, and I think I remember liking the way the Pro polys looked more lol

Re: Service Area Analysis - different results in ArcMap vs ArcPro ?

SonaSunny — Fri, 12 Apr 2019 19:36:48 GMT

That's what i was thinking too! But i am wondering why it generated a polygon area where there were no lines generated. (the area highlighted in yellow in my screenshot)

Re: Service Area Analysis - different results in ArcMap vs ArcPro ?

DylanHarwell — Fri, 12 Apr 2019 19:42:37 GMT

Yea that is odd. I was not generating lines when I ran this analysis, only polygons. I was doing 4 and 8 minute drive times, and I noticed the 4 minute polygons would turn out pretty detailed and follow roads around large open space areas. But the 8 minute polygons were much more generalized in the middle and all the open space areas with no roads were filled in.

Re: Service Area Analysis - different results in ArcMap vs ArcPro ?

JaySandhu — Fri, 12 Apr 2019 19:56:39 GMT

Most likely you choose the "Split" option in Pro. That is, split the area evenly between service areas. If you use the default "Overlap" option, you should get results similar to ArcMap. Or in ArcMap, you can choose the "Not overlapping" option and get similar results as your Pro screen shot.

Jay Sandhu

Re: Service Area Analysis - different results in ArcMap vs ArcPro ?

SonaSunny — Fri, 12 Apr 2019 20:19:07 GMT

I used the split option when i ran in Pro and used the Non Overlapping option in ArcMap.

Re: Service Area Analysis - different results in ArcMap vs ArcPro ?

SonaSunny — Fri, 12 Apr 2019 20:21:23 GMT

Re: Service Area Analysis - different results in ArcMap vs ArcPro ?

Ryan_ESRICommunity — Fri, 25 Feb 2022 19:52:34 GMT

Hello, Like the others, I'm wondering if there's been any update on this thread? I've searched through the settings in Pro to reproduce the polygon output from AcrMap but I can't seem to locate a "generalized" setting. The only options are Standard and High precision? Accordingly, is it even possible to emulate the results or is this just a function of different solver being employed in Pro? Thanks!