topic defining flow direction automatically..? in ArcGIS Network Analyst Questions https://community.esri.com/t5/arcgis-network-analyst-questions/defining-flow-direction-automatically/m-p/740704#M7093 <HTML><HEAD></HEAD><BODY><SPAN>Hi all,</SPAN><BR /><BR /><SPAN>this could well be a Spatial Analyst query but thought I might run it by people in here first:</SPAN><BR /><BR /><SPAN>I am currently investigating ways to model a large drainage network and have been playing around with setting up a geometric network and then using the Utility Network Analyst to trace flows etc.. </SPAN><BR /><BR /><SPAN>Of particular interest to me would be a way (if it were possible) of automatically assigning flow direction to a line based on high res contour data whereby a line may be automatically "flipped" to reflect the actual flow direction.</SPAN><BR /><BR /><SPAN>any advice/suggestions would be greatly appreciated.</SPAN><BR /><BR /><SPAN>cheers,</SPAN></BODY></HTML> Mon, 21 Feb 2011 02:50:11 GMT RobertFitzgerald 2011-02-21T02:50:11Z defining flow direction automatically..? https://community.esri.com/t5/arcgis-network-analyst-questions/defining-flow-direction-automatically/m-p/740704#M7093 <HTML><HEAD></HEAD><BODY><SPAN>Hi all,</SPAN><BR /><BR /><SPAN>this could well be a Spatial Analyst query but thought I might run it by people in here first:</SPAN><BR /><BR /><SPAN>I am currently investigating ways to model a large drainage network and have been playing around with setting up a geometric network and then using the Utility Network Analyst to trace flows etc.. </SPAN><BR /><BR /><SPAN>Of particular interest to me would be a way (if it were possible) of automatically assigning flow direction to a line based on high res contour data whereby a line may be automatically "flipped" to reflect the actual flow direction.</SPAN><BR /><BR /><SPAN>any advice/suggestions would be greatly appreciated.</SPAN><BR /><BR /><SPAN>cheers,</SPAN></BODY></HTML> Mon, 21 Feb 2011 02:50:11 GMT https://community.esri.com/t5/arcgis-network-analyst-questions/defining-flow-direction-automatically/m-p/740704#M7093 RobertFitzgerald 2011-02-21T02:50:11Z