topic Re: Stream extraction mistaking roads as streams in Spatial Data Science Questions https://community.esri.com/t5/spatial-data-science-questions/stream-extraction-mistaking-roads-as-streams/m-p/212102#M511 <HTML><HEAD></HEAD><BODY><P>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.</P></BODY></HTML> Wed, 11 Sep 2019 13:23:37 GMT SarahWells 2019-09-11T13:23:37Z Stream extraction mistaking roads as streams https://community.esri.com/t5/spatial-data-science-questions/stream-extraction-mistaking-roads-as-streams/m-p/212099#M508 <HTML><HEAD></HEAD><BODY><P>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?</P></BODY></HTML> Thu, 29 Aug 2019 13:21:56 GMT https://community.esri.com/t5/spatial-data-science-questions/stream-extraction-mistaking-roads-as-streams/m-p/212099#M508 SarahWells 2019-08-29T13:21:56Z Re: Stream extraction mistaking roads as streams https://community.esri.com/t5/spatial-data-science-questions/stream-extraction-mistaking-roads-as-streams/m-p/212100#M509 <HTML><HEAD></HEAD><BODY><P>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.&nbsp;</P></BODY></HTML> Fri, 30 Aug 2019 13:41:31 GMT https://community.esri.com/t5/spatial-data-science-questions/stream-extraction-mistaking-roads-as-streams/m-p/212100#M509 ThomasColson 2019-08-30T13:41:31Z Re: Stream extraction mistaking roads as streams https://community.esri.com/t5/spatial-data-science-questions/stream-extraction-mistaking-roads-as-streams/m-p/212101#M510 <HTML><HEAD></HEAD><BODY><P>Thank you! I will try this.</P></BODY></HTML> Fri, 30 Aug 2019 13:44:21 GMT https://community.esri.com/t5/spatial-data-science-questions/stream-extraction-mistaking-roads-as-streams/m-p/212101#M510 SarahWells 2019-08-30T13:44:21Z Re: Stream extraction mistaking roads as streams https://community.esri.com/t5/spatial-data-science-questions/stream-extraction-mistaking-roads-as-streams/m-p/212102#M511 <HTML><HEAD></HEAD><BODY><P>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.</P></BODY></HTML> Wed, 11 Sep 2019 13:23:37 GMT https://community.esri.com/t5/spatial-data-science-questions/stream-extraction-mistaking-roads-as-streams/m-p/212102#M511 SarahWells 2019-09-11T13:23:37Z Re: Stream extraction mistaking roads as streams https://community.esri.com/t5/spatial-data-science-questions/stream-extraction-mistaking-roads-as-streams/m-p/212103#M512 <HTML><HEAD></HEAD><BODY><P>At the risk of being egotistical, I <A href="https://repository.lib.ncsu.edu/handle/1840.16/4432">explored </A>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".&nbsp;</P></BODY></HTML> Wed, 11 Sep 2019 17:19:33 GMT https://community.esri.com/t5/spatial-data-science-questions/stream-extraction-mistaking-roads-as-streams/m-p/212103#M512 ThomasColson 2019-09-11T17:19:33Z