Exporting feature lines in a DXF for use with Trimble surveying equipment

[NMRollo]

We often have to create dxf files for surveyors to use in Trimble survey controllers. Usually, the linework has to be 3D polylines so that they can stake out the lines on the ground in 3D.

When compiling our design we often have to use arcs which do not function as 3D polylines. To get around this, we convert them to feature lines. This works for creating surfaces but we are unable to export these feature lines in our dxf files.

Can anybody suggest a way around this?

[mathewkol]

Not sure how many of these are in your drawing but you could create an alignment and profile. Then make a feature line from that which dynamically updates with edits to the alignment and profile. Use that feature line for surfaces. Then export the alignment and profile to RXL for import to your collector.

Or explode the FLs to 3D polylines before saving to DXF. They won't have curves but maybe they'll be tesselated anough after exploding.

[BrianHailey]

Have you tried the Export to DXF functionality within Civil 3D? It's different then the Saveas command.

[NMRollo]

Thanks Matt.

Tessalating and exploding is probably the best solution for us.

[NMRollo]

Thanks Brian

I shall investigate this approach.