Use this dialog box to specify the settings for new contour lines for a raster-based surface.
The Contour dialog box has the following options:
Enter the name for the new Display Manager layer that will contain the contour lines.
Select the difference in elevation between contour lines, for example, 10, 20, or 50.
Select the units (meters or feet) used to measure the elevation in your surface. AutoCAD Map 3D toolset attempts to get this data from the surface itself, but you can change it.
Select the difference in elevation between major (bold) contour lines. For example, if you select 5, every fifth contour line will be bolded.
Label the contour lines with the elevations they represent.
Select the type of feature to use when creating contour lines (polyline or polygon).
Enter a name for the new SDF file that will store your contour line features.