I am trying to generate a flow accumulation and flow length raster from flow direction.
I have successfully generated a flow direction raster from a DEM that was clipped by the 'Clip (Data management tool)'. This was done using the hydrology toolset in spatial analyst tools, in ArcMap 10.2. See image.
When I attempt to generate the flow accumulation or flow length rasters in ArcMap 10.2 I am receiving the following error message:
'Output accumulation raster'
Has anyone had a similar problem and rectified it? Could it be something to do with the way the data has been clipped? I only want to generate flow accumulation and flow lengths for the clipped area.
This problem was solved by following the advice of FelixIP 53 in comments.