Hola
I’m struggling to understand why the deviation I see in the ‘optimized’ vertical alignment far exceeds the tolerance used in the Optimize Linestring command. What I’m trying to do is get approximate K-values from an existing ground surface. I converted the provided alignment into a linestring and elevated it to the surface.
I wanted to mess with the maximum offset value and see what looked reasonable, but at .1ft input I am seeing over .5ft in the profile difference.
This is a different application than I have ever used this tool before, but I can’t recall ever seeing these deltas so far off of the input value.
Please advise on how I can use this better, or if there is something wrong.
Thanks
What settings did you use for the Max Vertical Curve Length and the Maximum Offset - If you have a Long Max Vertical Curve Length you can expect the max Offset to be greater than your input tolerance - normally you are inputting a small vertical curve length which will result in small offsets - however the two “tolerances will conflict with each other” if you say that max VC length is 200’ but the vertical tolerance is 0.1’ - the vertical tolerance in that scenario will be used to smooth out straight grade sections, and the Max VC length will control what happens in the VC locations where they get added. While the VPI of the curve may not change much, the curve will be offset from the original line at the VPI location which I think is what you are seeing here.
Alan
I generally leave that long, 100000 or whatever. When I shortened it to 100’, nothing changed.
Above is my default, very long. Below is 100’. No change.
Hey Alan, here’s the data if you want to take a look.
OG PROFILE VERTICAL CURVES.vcl (981.8 KB)
Thanks
