I am trying to calculate the flow length for a number of Subbasins in the Mary's River Watershed in Oregon. I am doing this in order to calculate the time of concentration for each subbasin.
My problem is that the output raster from the flow length tool shows values that I cannot decipher. I don't think it's shown in terms of cell size either. The cell size for the map is 0.00027777778. The greatest flow length value in one of my subbasins is 0.143758. Dividing this by the cell size gives 517.5. I roughly measured the distance of the channel using the measure tool, and it's around 6,000 meters.
What sort of units is the flow length output giving me?
Any help would be greatly appreciated, for I've scoured the web and can't find anything to address this concern.
I've posted a screenshot below to give some sort of reference to my problem.