Autodesk AUTOCAD 2008 - PREVIEW GUIDE Informações Técnicas Página 80

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70 | Chapter 4 Working with Surfaces
The following illustration shows the effect of an outer boundary.
Building Surfaces
After you choose the information to include in a surface, you can build the
surface. When you build a surface, all the surface data is processed and the
program calculates the surface triangulation. The triangulation is calculated
by combining the breakline, contour, DEM file data, and boundary data with
the surface point data and interpolating the results.
Everything that you add to a surface folder in the Terrain Model Explorer can
be used in the surface, but you can exclude certain data from build to build
to examine different results.
Key Concepts
You can have an unlimited number of surfaces in a project or drawing.
Surfaces are stored in the following folder:
c:\Land Projects <Version Number>\<project name>\dtm
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