The Overland flow length operation calculates for each pixel the overland distance towards the 'nearest' drainage according to the flow paths available in a Flow direction map.
The operation simply delivers an output raster map.
Dialog box options:
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Drainage network ordering map: |
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Select an input raster map that is the output of a previous Drainage network ordering operation. |
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Flow direction map: |
Select a raster map that is the output of a previous Flow direction operation. |
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Output raster map: |
Type a name for the output raster map that will contain for each pixel the overland distances towards the drainage this pixel drains into. |
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Description: |
Optionally, type a description for the output map. The description will appear in the status bar of the Main window when moving the mouse pointer over the map in a Catalog, and in the title bar of a map window when the output map is displayed. If no description is supplied, the output map will use its own definition as description. |
When you click the Show button, the dependent output map will be defined, calculated and shown. When you click the Define button, the dependent output map will only be defined; if necessary the map will be calculated later, for instance when the map is opened to be displayed.
See also: