topic Data structure of network file in ArcGIS Network Analyst Questions

Data structure of network file

XuebinWei — Sun, 05 Aug 2012 20:51:33 GMT

I want to write some python program to read the attribute of a established network. I found the ArcGIS can build a network very quickly and generate a folder of ??????Newtork_ND.nd with some files of ???.nds.

How does those files store the topological relation of network, like the connected edges and junctions?

Thanks.

Re: Data structure of network file

JaySandhu — Mon, 06 Aug 2012 14:14:28 GMT

The contents of the network dataset folder are in a binary proprietary format. However you can access the attribute information of a network dataset from python using the describe function. More here:
http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//000v00000055000000

With 10.1 there are additional python functions for network analyst. You can read more about that here:
http://resources.arcgis.com/en/help/main/10.1/index.html#//01mr00000012000000

Jay Sandhu

Re: Data structure of network file

XuebinWei — Mon, 06 Aug 2012 15:37:26 GMT

Hi Jay,

Thank you for your reply.

Is there a way that arcpy can read those attributes of a single edge of a network, just like the [Network Identify Tool] can easily find the connected edges and junctions of any selected edge?

[ATTACH=CONFIG]16707[/ATTACH]

Thanks,
Xuebin