Point cloud to complex profile or similar

[CarlM]

Hi,

I am working with a point cloud (imported from a .e57-file), which among other things, contains a tunnel.

The tunnel is of varying width and height over the run of its length.

What would be the best practice to make this tunnel into a complex profile, object or similar?

What I would like to do is take section-snapshots every meter or so and then have a surface extrapolated between those sections.

Is there a simple way of achieving this that I am missing?

/thanks

[CarlM]

Thank you Barry!

I will look at those softwares as well.
Looks promising!