topic Re: Set Flow by Digitized Direction in Water Resources Questions

Set Flow by Digitized Direction

LornaMurison — Thu, 19 Apr 2012 17:45:24 GMT

I have a river network within a watershed of just under 5000 square km. The digitized direction represents the direction of flow. Apparently there are two ways to set the flow direction:
1) Identify sinks and sources. I don't have either, and can't think of a way to quickly generate them for over 40,000 segments.
2) Use a tool such as this: http://edndoc.esri.com/arcobjects/8.3/Samples/Network/Utility%20Network%20Analysis/Flow%20Direction%20Tool/IndivFlowDirTool.htm. I have tried installing the .dll but I get a message saying "no new objects were added". Could this be because I don't have administrative rights on this machine?

Any suggestions?

Re: Set Flow by Digitized Direction

DuncanHornby — Mon, 30 Apr 2012 15:23:51 GMT

Lorna,

You may want to actually use this tool as it sets the flow direction of ALL polylines in a geometric network. As for your error I guess thats your problem.

Duncan

Re: Set Flow by Digitized Direction

LornaMurison — Tue, 01 May 2012 19:09:56 GMT

True, that is the tool I need.
Still won't let me load the dll though.

Set Flow by Digitized Direction DLL

DuncanHornby — Wed, 02 May 2012 08:31:26 GMT

Lorna,

FYI I've got ArcGIS 10 and was able to add the DLL to ArcMap without any error and then drag the button onto a toolbar although I did not use it. This would indicate that it's a permission issue for you and you need to get IT "support" to help you.

Duncan