topic Re: Centrality analysis with GIS network analyst in ArcGIS Network Analyst Questions

Centrality analysis with GIS network analyst

AndresSevtsuk — Fri, 29 Oct 2010 20:32:01 GMT

Can somebody please recommend a download for a toolbox that can do Centrality analysis on spatial networks in GIS network analyst? Specifically interested in Betweenness centrality and Closeness Centrality, thought other methods would be of help too.

Thanks,

Andres

Re: Centrality analysis with GIS network analyst

AndresSevtsuk — Fri, 22 Jul 2011 02:36:08 GMT

For others who might be interested, we built a toolbox that performs centrality analysis on spatial networks. It builds an adjacency matrix for instances (i.e. buildings) on a network, and can compute Reach, Gravity Index, Betweenness, Closeness, and Straightness on spatial networks. Download from: http://cityform.mit.edu/projects/urban-network-analysis.html

Andres Sevtsuk
Lecturer in Architecture/Urban Studies & Planning
Massachusetts Institute of Technlogy

Re: Centrality analysis with GIS network analyst

PatrickStevens — Fri, 22 Jul 2011 18:09:22 GMT

Andres,

Great work!

I tried a sample analysis on my own network dataset and got the error "Invalid value for Impedance Attribute". Is there a specific impedance attribute name or type that is necessary?

Thanks

Re: Centrality analysis with GIS network analyst

DavidWasserman — Mon, 06 Nov 2017 19:32:46 GMT

I realize this is a very old thread, but I have been increasingly looking for something like this toolbox to identify low stress bicycle network bottlenecks. I see the toolbox is only supported up to 10.2 and I have a few questions.

1. Is this toolbox still maintained? asevtsuk‌ do you have any plans to distribute through Github?

2. The license on the toolbox is a creative commons license that is pretty restrictive (no commercial use). Will this be changed in the future?

Re: Centrality analysis with GIS network analyst

LeileiDuan1 — Tue, 28 Nov 2017 17:44:27 GMT

I have the same question. It seems like the Google group stopped posting after 2016. I did hear that the Rhino version is being maintained. I ran the test data on 10.5 and it worked, after 7.5 hr though. I'm having a hard time getting the tool to work for Tampa buildings. Let me know if you hear anything.

Re: Centrality analysis with GIS network analyst

DavidWasserman — Wed, 29 Nov 2017 00:04:25 GMT

Hey Leilei,

I would actually suggest installing NetworkX and using their centrality metrics, is the easiest open source alternative. They have shapefile import/export. I think in the long term Pandana might provide more support these types of metrics.

Hope all is well.

David

Re: Centrality analysis with GIS network analyst

BrooksBreece — Tue, 26 Dec 2017 15:53:19 GMT

Good morning,

The shapefile import/export requires that you have gdal installed, correct? Holisticbynature‌, do you have any sample code of how you have used networkx in spatial analyses?

What kinds of questions were you answering?
Did you build a script tool or use networkx in a script outside of ArcGIS?

Thank you for your previous response.

Have a nice day.

Re: Centrality analysis with GIS network analyst

DavidWasserman — Wed, 27 Dec 2017 20:46:37 GMT

Hi Brooks,

Your questions are timely. I am working on a set of tools for network analysis/smart location database generation that I want to opensource at some point in 2018. I am working with Google Datalab to work with NetworkX (Vs 1.5.0), Geopandas, and Pandana to get a workflow taking data processed & edited in ArcGIS into pandana/networkx graphs.

Questions I am interested in answering rest with accessibility analysis and how different graph indexes can be used to determine an edges importance to overall network connectivity (as part of a prioritization analysis). For the time being I am contemplating pandana/networkx for the task outside of ArcGIS (the speed of pandana queries is part of the reason). I will have some code samples later, but I have been referring to SEMCOG code that provides some examples on converting NetworkX (import shapefile) graphs to Pandana networks.

Hope you find this helpful. If you want to collaborate on this, also willing to talk about that.

Thanks,

David