Toposurfaces

To represent the topography of the site, create a toposurface in the Revit model.

Site tabModel Site panel

(Toposurface)
(Subregion)
(Split Surface)
(Merge Surfaces)
(Graded Region)

Topics in this section

About Toposurfaces
The Toposurface tool defines a topographical surface (a toposurface) using points or imported data. You can create toposurfaces in 3D views or site plans.
Videos: Create Toposurfaces and Regions
Watch these videos to learn how to create and work with toposurfaces, subregions, and graded regions.
Create a Toposurface by Placing Points
Create a toposurface by placing points in the drawing area.
Create a Toposurface by Importing Contour Data
Automatically generate a toposurface based on 3D contour data imported from DWG, DXF, or DGN files.
Create a Toposurface with a Points File
Export a points file from a civil engineering application, and import it to create a toposurface in the Revit LT model.
Simplify a Toposurface
Each point in a toposurface creates triangulated geometry, which adds to the computational overhead. When a toposurface is created using a large number of points, you can simplify the surface to improve system performance. When a toposurface is simplified, the accuracy and geometry of the contours may be affected depending on the specific conditions of the toposurface. After a toposurface has been simplified, verify the contours and geometry. Add points for accuracy if needed.
Create a Toposurface Subregion
A subregion defines an area of the toposurface where you can apply a different set of properties, such as material.
Split a Toposurface
You can split a toposurface into 2 distinct surfaces and then edit those surfaces independently.
Merge Toposurfaces
You can merge 2 separate toposurfaces into one surface.
Create a Graded Region
Grade areas of the toposurface, changing elevations at selected points, to develop the proposed site design.
Toposurface and Subregion Properties
View or change properties for a toposurface or subregion with the Toposurface tool.

Parent topic: Site Design

Toposurfaces

Related Concepts

Related Tasks