ArcGIS 10 : Create road graph

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03-19-2013 03:13 AM
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New Contributor
Hello,

Sorry for my english,

I try to create a road graph "test" from the layer "Route" of the BD Topo IGN.
To generate a graph with Network Analyst, it is asked to create and to inform certain number of fields, bans to calibrate the graph (oneway, FT Minutes, TF Minutes).

Still having never to create of graph, I would like knowing how to determine the values by section for fields FT Minutes and TF Minutes. It's well these fields which allow to affect a time of route by section following the speed?
If I understood well, FT and TF is the extremities of my sections.

I found an example of calculation: Minutes_ft = (longueur_tronçon / 2/1000 / [speed] 60), this calculation is it correct?

Thank you for your answers.
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Esri Contributor
Hello,

I'm not sure I completely understand your question. But I think you want help to get started creating network datasets and calculating a time-cost network attribute. If so, it may help if you watch the videos in the following series, especially videos 1 and 2.

http://video.arcgis.com/series/54/network-analyst

Video two is focused on calculating From-To and To-From drive times.

The videos have transcripts, but it doesn't look like they've been translated out of English yet. If you have any questions, just let us know.

All the best,
Robert
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