I tried to search other questions to see if this has been answered but couldn't find anything, so sorry if this is redundant. I use the Hydrology toolset in Spatial Analyst to create a stream feature in ArcMap using a downloaded DEM. The series of tools I used was the following:
- Fill (input DEM)
- Flow Direction (input Fill)
- Flow Accumulation (input Flow Direction)
- Conditional > Con (input Flow Accum – input cond raster, Flow Dir input true rast & the optional)
- Stream Order (input Con and Flow Dir)
- Stream to feature (input Stream order & Flow Dir) a. Definition query: "GRID_CODE" > 2
I am relatively happy with the outcome except in the north section of the watershed where the stream vector detail was not read correctly and only produced straight lines.
Am I missing a step that would allow this to be read properly and converted into the same level of stream detail as everywhere else in the watershed?
Note: The straight lines are over cropfields, residences, and timber. I included the only waterbodies on the maps because I did notice on other stream generations that open water creates "straight lines." See aerial image below.