Flow Direction
In a (sink-free) Digital Elevation Model (DEM), the Flow direction operation determines into which neighbouring pixel any water in a central pixel will flow naturally.
Explanation
From the main ILWIS menu select the option “Operations” > “Dem Hydro‐processing” > “Flow Determination” > “Flow Direction”, as input DEM use “eth_dem_fin”,
Outgoing relations
- Flow Direction output Flow Direction Map
Incoming relations
- DEM input Flow Direction