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How to add unique ws_id field for watersheds
I've been getting "KeyError: 0" while trying to run the NDR model. I'm pretty sure that the problem is that I have multiple watersheds but they all have the same value, 0, for ws_id-- which is because, every time I add ws_id to the Attribute Table in ArcMap, it never does anything but give them all zeroes. How do I get it to give each watershed a unique value?