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Flow direction values of 1 - 255. Why is this happening?

Question asked by gurung.anan on Apr 12, 2017
Latest reply on Apr 12, 2017 by jayanta.poddar

I am using a practice data set to practice the delineation of watersheds. I have been following the manual and so far everything is going well. However, when using the "Flow Direction" tool, the output has values ranging from 1 to 255. 


The values show that they extend from 1 to 255 but they go on to expand even more until 254Although it shows the value between 1 - 255, should I be worried? Why is it showing so many values?