I am trying to update a current model with historic planform data. I am able to import the historic centerlines, banklines, and flowpaths. I am using existing cross sections to not interrupt any 1D/2D connections. I would like to keep the river stationing the same to make visualization/comparison easier at the end so it is easier to compare the same (spatially) cross section for the different conditions. So, I have to past in the previous stationing to the cross section attribute table once I add the historic lines. However, once I added all my new features, recomputed reach lengths and bank stations in RAS Mapper, and made sure the cross section attribute table showed the correct stationing, I saved the geometry and my original (the current conditions) can back (changing the CL is the first step I take and several “saves” ago). This was the closest I got it to working before getting an issue.
I went back and tried to just add back the historic centerline and compute what I needed, but then I started having the issue again where a straight “river” feature would appear between two cross sections. Sometimes it is between random cross sections on difference rivers, and sometimes it is between the first and last cross section of each river in the system. I try just deleting them, but at least one always appears once I save. It also causes the cross sections to rearrange slightly in the attribute table.
Does anyone have any ideas on what it causing this or how to resolve? Is is because RAS Mapper is georeferenced and knows the river stationing is not being updated?
Note: I am also trying to avoid updating the river stationing so I don’t have to manually update the ~150 structures along the rivers I am changing (bridges, inline structures and lateral structures). Unless, does anyone know how to have these automatically update once cross sections stations are updated? This may deserve a forum post of its own.
