I am New to Geometric Networks. I need to build a river network and find all locations (polygons) upstream. This is the template I am trying to use.
I have my rivers with to and from node and the flow direction and accumulation. I have my pour point (flags) snapped to the network.
How do I build the network to ensure that flow is only downhill and how do I get the upstream IDs?
In the image below I would need to return the Blue Circles (the polygon IDs) for the green pour point. At the moment my network appears to be a free-for-all. When I trace upstream everything is returned.
The network works now. The snapping (for my flags) and the set flow direction worked. My remaining question is how to get the Polygons out! I have 50,000 Flags so I assume I iterate a model, convert the selection to a feature class, then intersect the polygons.
Is this correct or does an easier way to get the polygons out exist?
I feel I need to get the Polygons IDs onto the rivers and then just trace upstream.