Establishing Existing Conditions Using Survey Data

With our tour of the AutoCAD® Civil 3D® software user interface and ourNstudy of its capabilities behind us, it’s now time to do what we came here toNdo: Use Civil 3D to complete a land-development project. To begin to understandNthe task ahead, let’s imagine land development as creating a sculpture,Nbut on a very large scale. If sculptors were to create works of art from wood,Nthey would probably begin by studying the original piece of wood, assessing itsNdimensions, shape, and surface features. These elements would all factor intoNhow the sculptors would approach their work. A sculptor with some computerNsavvy might even model the original piece of wood on a computer and plan outNeach cut of material.

In this chapter, we are going to explore the first activities that are performedNduring a land development project: the measurement, mapping, and modelingNof the land in its existing form. To plan out how the land will be reshaped,Nyou must first understand how it is shaped right now. This is analogous to theNsculptor’s measurement and assessment of his or her medium. The measurementNand mapping of land is known as surveying and the data that is collected during the process is known as survey data.
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