AutoCAD® Civil 3D® 2012 Essentials: Autodesk® Official Training Guide: Essential

Creating Sample Lines

With a profile, the alignment serves as the path along which the profile is cut. For a cross section, this role is assumed by the sample line. When sample lines are created, they are associated to an alignment. Multiple sample lines are typically created simultaneously, so Civil 3D requires that sample lines be placed within a sample line group. An alignment can host multiple sample line groups if necessary. So, the placement of sample lines in the alignment hierarchy is Alignment Sample Line Groups Sample Lines.

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