I need a layer showing all the watershed or catchment of the whole world. This is very hard to find because the definition of basin watershed and catchment seems to be different each place I look. All the data that I have found have turned out to be large scale (which I would think would be basin data).
Basically I need a map of the smaller separation units of the hydrological cycle. I have attached an example of the scale that I need the info at, which is the only data that I have found at this scale and it is only for africa.
Thank you very much for your help.