Flow Direction
Flow direction means the direction the stream flows in each cell. Please see the figure below the direction coding; it is called eight-direction flow direction coding. That a steam flows from the center cell to its eight neighboring cells is considered that it flows to eight different directions, and the eight neighboring cells will be assigned a number; if the water flows from center to the right side(the flow direction is identified by the steepest slope or the direction with the greatest height difference), the flow direction value will be 1. If "Force edge cells to flow outward" is checked, the cells on the edge of DEM will be treated as flowing outward across the elevation surface.
Description of Parameters
Item |
Description |
Data Type |
Input Surface |
The elevation surface to be performed Flow Direction analysis. |
Raster data |
Force edge cells to flow outward |
Regard the edge cells of the input digital elevation model flow outward from the surface. |
Analysis options |
Output Raster |
The filename and storage path of output raster. |
Raster data |
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