Stream Feature generated from DEM is missing data

by Kristin Adams   Last Updated October 09, 2019 17:22 PM - source

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:

  1. Fill (input DEM)
  2. Flow Direction (input Fill)
  3. Flow Accumulation (input Flow Direction)
  4. Conditional > Con (input Flow Accum – input cond raster, Flow Dir input true rast & the optional)
  5. Stream Order (input Con and Flow Dir)
  6. 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? Open to any suggestions, thank you!

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