topic Automatically pick crestlines/top/bottoms of sandwaves/(sanddunes)? in Developers Questions https://community.esri.com/t5/developers-questions/automatically-pick-crestlines-top-bottoms-of/m-p/881938#M5638 <HTML><HEAD></HEAD><BODY><P>Hi! I am looking for a way to automatically draw crestlines/top/bottoms of sandwaves/(sanddunes) from xyz data, so was wondering if anybody have experience with bedfrom characterization and know about a raster function/equation in ArcGiS pro that can do that (which is not the watershed tool)? I have time-lapse data of the sandwave field so an aim is to plot vectors showing direction and distance of sandwave movement, however that part I am able to do in MATLAB.&nbsp;</P><P></P><P>I have been able to do it in GRASS by a existing code which uses a curvature map and then extract the most elevated point at a curvature above X in a defined area. However this function creates some undesired gaps in the data, so I am interested if there is another way.&nbsp;&nbsp;</P><P></P><P>Best regards,</P><P>Malin&nbsp;&nbsp;</P></BODY></HTML> Fri, 09 Oct 2020 08:21:37 GMT MalinWaage 2020-10-09T08:21:37Z Automatically pick crestlines/top/bottoms of sandwaves/(sanddunes)? https://community.esri.com/t5/developers-questions/automatically-pick-crestlines-top-bottoms-of/m-p/881938#M5638 <HTML><HEAD></HEAD><BODY><P>Hi! I am looking for a way to automatically draw crestlines/top/bottoms of sandwaves/(sanddunes) from xyz data, so was wondering if anybody have experience with bedfrom characterization and know about a raster function/equation in ArcGiS pro that can do that (which is not the watershed tool)? I have time-lapse data of the sandwave field so an aim is to plot vectors showing direction and distance of sandwave movement, however that part I am able to do in MATLAB.&nbsp;</P><P></P><P>I have been able to do it in GRASS by a existing code which uses a curvature map and then extract the most elevated point at a curvature above X in a defined area. However this function creates some undesired gaps in the data, so I am interested if there is another way.&nbsp;&nbsp;</P><P></P><P>Best regards,</P><P>Malin&nbsp;&nbsp;</P></BODY></HTML> Fri, 09 Oct 2020 08:21:37 GMT https://community.esri.com/t5/developers-questions/automatically-pick-crestlines-top-bottoms-of/m-p/881938#M5638 MalinWaage 2020-10-09T08:21:37Z