I am finding the watershed and streams in an area that contains a few roads. It is mistaking some of the roads as streams. How do I make sure the stream extraction isn't picking up the roads as well?
When you say picking up roads as streams, I'm assuming your source DEM is detailed enough to treat the road bead as a shallow stream channel (curb and gutter). This is pretty common in hydro network extraction. What you need to do is "burn" each road crossing over a stream such that the elevation drop across the road carries your flow direction downstream, and not making a hard turn onto your road.
Thank you! I will try this.
A lot of what I am finding online is burning stream networks into DEM. Is this process going to be different with roads? Some of the sources online aren't very clear.
At the risk of being egotistical, I explored a lot of different ways to "condition" dems for stream network extraction. Been a few years, but I think you want a tool called "Whitebox GAT".
Retrieving data ...