WMS:Defining Basins (TINs)

The Define Basins command assigns each triangle in the TIN to a drainage basin. This is accomplished by initiating a flow path from the centroid of each triangle and "flowing" down until an outlet point is encountered. The triangle is then assigned the appropriate basin ID. The boundaries may appear rough or jagged because each triangle is assigned according to the flow from its centroid, when in fact the triangle may actually straddle basin boundaries. Boundaries may be corrected by issuing the Refine Boundaries command. The drainage basin boundaries option in the Drainage Display Options dialog is automatically set when defining basins.

Related Topics:

• Outlets
• Streams
• Reservoirs
• Refining Boundaries
• Delineation with TINs
• Delineation with DEMs
• Computing Basin Data