Hi @james_c_452​,

This looks like an interesting exercise. Would you be able to share some samples of these railway lines for testing?

Hi @daveatsafe​ ,

Here is a small sample of some rail lines before I used the other tool I was talking about. Which makes a centerline, and can adjust the vertices to 1m so they are aligned with each other like the picture above

Hi @james_c_452​,

The distance between the rails is fixed and the curves are smooth, so the OffsetCurveGenerator may do a good job. You will need to separate the left and right rails, then use only one side to the generate the appropriate offset for the centerline.

Hi @daveatsafe​ ,

I don't think that tool will work in this case. In the past I have used it and it created a 2D line. What I'm after is a new center line in 3D midway between the left and right rails. The left and right rails don't have a consistent distance apart. There is some different how they have laid track and there are differences in height around corners

Thanks

Hi @james_c_452​ 

This one is indeed interesting. I do not think it's perfect, but I came up with the following method. I have attached the workbench.

Be aware that the Z values are interpolated and that the resampled vertices don't always have the 1 meter interval, especially at the end of the line.

Hi @markvv​ ,

That's pretty good thanks! Seems to work pretty well. I worked out how to remove the weird ends of lines (Join a vertex to the next vertex, calculate line lengths, remove anything not between 0.99-1.01, then make the lines).

However there is a random problem in the middle of another file I tested. It seems the left/right/centre attribute has got all muddled leading to some funny results. Do you know why this is doing this? I haven't found where in your workspace is causing this