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I often use a “vacuum form” style workflow to generate my proposed surface.
You can use the same workflow as above by drawing an alignment, proposed profile, boundary marked point, and feature line workflow. You can swap the marked point for the disk channel if needed. Either way, model the centerline and add it to the proposed surface.
Tidy polylines
Move first vertex away from corner or curve for lopped lines
Convert polylines to feature lines, make sure you name them correctly
Make a pair of kerb subassemblies, set the height very big to start to make it easier to check the corridor is set up correctly
Check corridor, make sure no regions are running backwards
A single marked point. This can turn an alignment and profile into a feature line
Draw a quick boundary profile, usually following existing ground. You can use existing ground if there are no gaps in the data.
Add a corridor, use marked point assembly and bounday alignment and profile, extract the feature line.
Add boundary feature line to proposed surface.
Adjust frequency of boundary corridor if needed.
Extract feature lines from kerb corridor
Always name your feature lines!
Add kerb corridor feature lines to proposed surface
Add centre line alignment
Draw a quick centre line profile. No doubt you will be adjusting this throughout the project.
Draw a corridor again for the centreline. You can just add it to the kerb corridor.
Exact feature line from centreline corridor, add this feature line to the proposed surface
End result.
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