Hi,
I digitized the river centerlines and I used snapping tools to connect reaches. But when I checked the attributes table, I saw that my reaches are not connected because in that table, FromNode, ToNode, ArcLength, FromSta and ToSta are <Null>.
I clicked on RAS Geometry -> Stream Centerline Attributes -> Topology. After that I met this error: "River nodes lie outside the terrain". I don't know how to solve this.
Thank you very much if you could help me.
Amir