Adjoint Catchment NextDownID incorrect

Question

J'utilise ArcHydro 3.2.52 dans ArcGIS Pro 3.3.2. J'essaie de voir quel bassin versant draine vers quel bassin versant en aval en utilisant le traitement Adjoint Catchment. Les étapes de prétraitement (génération des lignes de drainage, bassins versants, etc.) fonctionnent bien. Le NextDownID dans les bassins versants est rempli lors de l'exécution de l'outil Adjoint Catchment Processing, mais le résultat n'a pas de sens. Les bassins versants drainent vers des bassins qui ne sont pas du tout connectés à proximité. Je n'ai aucune idée de ce que je pourrais faire de mal, à part peut-être mal comprendre le concept de cet outil. 
Connexion illogique

glasbergenm · Answer

Thanks, I'll see what I can make of your suggestions of looking into identified data processing items

DeanDjokic · Answer

The concept of NextDownID (NDID) is fairly straightforward (HydroID of the downstream feature in the same feature class).  For catchments, it is based on drainage line connectivity and relationship between catchment and its drainage line.  It is hard to tell what might be going on with the process based on just the picture you provided (without HydroID and DrainID attributes on catchments and drainage lines surrounding the problem area).  I run the standard terrain processing workflow (although i did fill sinks) using 3.2.52 build, and the catchment NDIDs look good.  There are few ways to check what is going on on your end, but the simplest way is for you to send me the geodatabase with your processed vector data - at least drainage lines, catchments, adjoint catchments and APUNIQUEID table.  I can quickly look at it and and see it anything pops out.  If not, i might ask you to send the DEM and step-by-step process you went through and we'll try to see if we can recreate the problem with your data.

Dean