Creating corridor surfaces can be done by two main ways.
Feature lines and Links.
When created by links there are many cases that civil 3d jump from links to points that do not belong to those links.
So the best way to create a correct surface is to use feature lines.
But in this case when creating custom subassemblies you must assign codes to all points for all cases.
Another disadvantage is that there are cases that surfaces may end to points with various coding.
Another serious issue has to do with boundaries.
Selecting automatic corridor edges in most cases gives a wrong boundary.
Interactive works fine.
By object works fine.
The best of all is to select which feature lines to use.But it can not be used for all cases.
Feature lines and Links.
When created by links there are many cases that civil 3d jump from links to points that do not belong to those links.
So the best way to create a correct surface is to use feature lines.
But in this case when creating custom subassemblies you must assign codes to all points for all cases.
Another disadvantage is that there are cases that surfaces may end to points with various coding.
Another serious issue has to do with boundaries.
Selecting automatic corridor edges in most cases gives a wrong boundary.
Interactive works fine.
By object works fine.
The best of all is to select which feature lines to use.But it can not be used for all cases.
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