About Surfaces
A surface is a three-dimensional geometric representation of an area of land, or, in the case of volume surfaces, is a difference or composite between two surface areas.
About the Surfaces Collection (Prospector Tab)
Use the Surfaces collection in the Prospector tree to access the surfaces in a drawing. As surface objects are created, they are displayed as named surfaces under the Surfaces collection.
About the Surface Collection (Settings Tab)
Use the Surface collection in the Settings tree to manage surface settings, surface styles, surface label styles, surface table styles, and surface command settings.
About the Surface Definition
A surface definition is a collection of a surface build, data, and edit properties, as well as a list of the operations that you have performed on the surface. The type of definition data items that a surface can have depends on the surface type.
About Working With Large Surfaces
In AutoCAD Civil 3D you can build, edit, and save large surfaces. The term “large surface” applies to a surface with a number of points exceeding one million (generally, 1 million points for a grid surface or a snapshot of a TIN surface, and 2 million points for a TIN surface).