topic Editing and combining Arc Hydro's Hydro Networks in Water Resources Questions https://community.esri.com/t5/water-resources-questions/editing-and-combining-arc-hydro-s-hydro-networks/m-p/355072#M1764 <HTML><HEAD></HEAD><BODY><P>I have produced two Hydro Networks (junctions and edges) for two Lidar tiles, and now I'm trying to combing these feature classes without destroying any of the attribute data.</P><P></P><P>(Attached: "Capture")</P><P></P><P>In the attached image I have my two sets of tile junctions/edges. I removed the Hydro (Geometric) Network in order to use ArcMap's topology functions. After merging feature classes (X junctions merged to Y junctions / X lines merged to Y lines) I performed a series of "X features must not overlap Y features" and "no pseudo nodes" topology corrections. Through this, I was able to combine all the junctions and lines AND preserve all the original attribute information (with newly-calculated shape lengths, since some of the lines had been combined).</P><P></P><P>(Attached: "Capture2")</P><P></P><P>The problem is, I don't know how to put these junctions and lines "back" into a Hydro Network. The reason I'm interested in doing this is to use Utility Network Analyst to show flow direction for each of the lines. Is the Network even necessary? I suppose I don't really understand the functionality of these Hydro Networks.</P></BODY></HTML> Thu, 12 Dec 2019 14:57:23 GMT EllenFehrs 2019-12-12T14:57:23Z Editing and combining Arc Hydro's Hydro Networks https://community.esri.com/t5/water-resources-questions/editing-and-combining-arc-hydro-s-hydro-networks/m-p/355072#M1764 <HTML><HEAD></HEAD><BODY><P>I have produced two Hydro Networks (junctions and edges) for two Lidar tiles, and now I'm trying to combing these feature classes without destroying any of the attribute data.</P><P></P><P>(Attached: "Capture")</P><P></P><P>In the attached image I have my two sets of tile junctions/edges. I removed the Hydro (Geometric) Network in order to use ArcMap's topology functions. After merging feature classes (X junctions merged to Y junctions / X lines merged to Y lines) I performed a series of "X features must not overlap Y features" and "no pseudo nodes" topology corrections. Through this, I was able to combine all the junctions and lines AND preserve all the original attribute information (with newly-calculated shape lengths, since some of the lines had been combined).</P><P></P><P>(Attached: "Capture2")</P><P></P><P>The problem is, I don't know how to put these junctions and lines "back" into a Hydro Network. The reason I'm interested in doing this is to use Utility Network Analyst to show flow direction for each of the lines. Is the Network even necessary? I suppose I don't really understand the functionality of these Hydro Networks.</P></BODY></HTML> Thu, 12 Dec 2019 14:57:23 GMT https://community.esri.com/t5/water-resources-questions/editing-and-combining-arc-hydro-s-hydro-networks/m-p/355072#M1764 EllenFehrs 2019-12-12T14:57:23Z