Corridor Feature Lines extract incorrectly through spirals only

[richard.vanderspuy]

Hi,

I am hoping someone has a solution to why my feature lines are not correctly extracted from corridor through spirals only. When extracting feature lines from corridor for all other regions of my rail alignment (i.e. tangents and curves), the feature lines are generated correctly. Has anyone else found a solution to this problem?

Thanks so much. 

[Jeew-m]

An image is worth a thousand words.

In your corridor, set a closer frequency interval for spirals than for curves and tangents. May be same interval of curves would also be OK.

[richard.vanderspuy]

Thanks for your reply.

Yes this is the first thing I tried but unfortunately this simply exacerbates the issue by creating a more dense "sawtooth" problem as shown below. 

I am of course unable to extract the necessary corridor solids for these problematic spiral regions as shown below also.

[Jeew-m]

seems like you do not have any feature lines in the corridor as well.

Are you sure you have enough surface data in this locations to run the daylight?

Anyway, Can you upload the drawing. 

[richard.vanderspuy]

This is not a surface target issue.

Extracting a feature line from corridor works fine everywhere except through spirals.

Drawing attached.

[Jeew-m]

The drawing is very confusing.

Can you upload the sample with only one corridor?

[richard.vanderspuy]

A solution to the problem has been found.

Offset targets updated from "Yes" to "No" as shown below.

Corridor Feature lines then generate correctly through spirals.

[Jeew-m]

Good. I also noted that, but could not verify because there were so many corridors.