Book excerpt: Learn the basics of AutoCAD Civil 3D easily and efficiently from the straightforward explanations and realistic exercises in Introducing AutoCAD Civil 3D 2009. In this helpful introductory guide, you will find an overview of key concepts and in-depth, detailed coverage of special topics like lines and arcs, points, surveying, parcels, surfaces, alignments, profiles, corridors, grading, sections, pipes, and project management. If you are a civil engineer or civil engineering student, you will understand how to apply AutoCAD Civil 3D to real-world, professional situations after reading this book. For Instructors: Teaching supplements are available for this title.