I am running stream definition and getting a raster with values from 1 to 255 rather than a simple 1 for all cells part of a stream. The raster is also completely empty (see attachment).
I am using an integer flow accumulation grid as input which was created by using the flow accumulation tool in spatial analyst. ArcGIS hangs whenever I try to create a flow accumulation grid using ArcHydro, or create a floating point grid using spatial analyst. I'm not sure why the integer one shouldn't work, though.
Has anyone encountered this issue before?