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

Understanding Feature Lines

In Chapter 4, you used survey figures to serve as breaklines in the EG surface. For a design surface, you will use feature lines for most of your breaklines. Survey figures and feature lines are fundamentally similar: they are three-dimensional linear objects that can be named, stylized, and shown in Prospector. The primary difference is that you design feature lines, whereas survey figures are driven by data collected in the field.

Understanding Sites

When working with feature lines, you have to consider the use of sites. Feature lines in the same site are “aware” of one another and will try to interact if the opportunity presents itself. For example, if one feature line crosses over another feature line in the same ...