About AutoCAD Civil 3D Objects

Design entities that are created in an AutoCAD Civil 3D drawing are referred to as objects.

The primary AutoCAD Civil 3D object types are as follows. For more information about the object, click the corresponding link.

	Alignments
	Appurtenances
	Assemblies
	Building Sites
	Cant Views
	Catchments
	Corridors
	Feature Lines
	Fittings
	Gradings
	Intersections
	Parcels
	Match Lines
	Mass Haul Line
	Mass Haul View
	Pipes
	Pipe Interference Checks
	Pipe Networks
	Points
	Point Clouds
	Point Groups
	Pressure Networks
	Pressure Pipes
	Profiles
	Profile Views
	Sample Lines
	Sections
	Section Views
	Sites
	Structures
	Subassemblies
	Superelevation View
	Surfaces
	Survey Figures
	Survey Networks
	Tables
	View Frames
	View Frame Groups

Use the Prospector and Settings tabs in Toolspace to access detailed object properties and settings. For more information, see About the Toolspace Window.

Object Interaction

AutoCAD Civil 3D objects automate the design process by interacting with other AutoCAD Civil 3D objects.

In the object model, changes in one object can be passed on automatically to associated objects where desired. For example, if you redesign an alignment curve, any grading using that alignment as a baseline can be modified accordingly. In addition, all related stationing, labels, and other alignment-specific data is updated.

The following table provides examples of which objects can be updated when you edit each type of object:

When you edit this object type...	These objects may be updated...
Points	Surfaces
Surfaces	Grading, Profiles, Pipe Networks, Corridors
Parcels	Grading, Corridors
Alignments	Grading, Parcels, Corridors, Profiles, Sections, Pipe Networks, Intersections
Profiles	Intersections
Grading	Surfaces, Corridors
Subassemblies	Assemblies, Corridors
Assemblies	Corridors
Pipe Networks	Surfaces, Alignments
Feature Lines	Grading
Sample Lines	Sections, Mass Haul diagrams