Modeling a site by hand from a scan takes hours. With ZetaBIM you go from Revit point cloud to topography in two steps: first measure the ground, then shape the terrain to those points.

How Revit point cloud to topography works

1. Calculate Surface measures the ground on a grid and places a ZetaRefPoint at each measured height.
2. Topo By Points uses those points to build the terrain.

As a result, the terrain follows the real ground from the scan, not a guess.

Step 1: Measure the ground

1. Open a 3D view with the point cloud visible.
2. Create a flat floor under the site area as a reference.
3. Run Calculate Surface, set the grid size and click Create. ZetaRefPoints appear on the ground.

See the Calculate Surface guide for every option.

Step 2: Create the topography

Revit 2024 and newer (Toposolid)

1. Create a toposolid that covers the site.
2. Click Topo By Points (Zeta BIM tab › PointCloud Tools) and pick the toposolid.
3. Select the ZetaRefPoints and click Finish. The toposolid is shaped to the points.

Revit 2021–2023 (Topography surface)

1. Click Topo By Points.
2. Select the ZetaRefPoints and click Finish. A new topography surface is created through the points.

Good to know

• Revit 2021–2023 needs at least 3 points at different positions. Points at the same position in plan are counted once.
• On a toposolid, points outside its boundary are skipped; the others are still added.
• You can add more points later with Placing Ref Point and run Topo By Points again.

FAQ

Can Revit make topography from a point cloud by itself?
Revit can build a surface from imported points files, but not directly from a linked point cloud. These two tools fill that gap.

How dense should the grid be?
Use a coarse grid on flat ground and a finer one on slopes, so the terrain stays light but accurate.

Related

• Calculate Surface · Floor By Points · Roof By Points

Video

Get ZetaBIM

ZetaBIM is a Revit plugin for scan-to-BIM teams. See the complete guide to the Revit point cloud plugin workflow. Download ZetaBIM to try it, browse more ZetaBIM tutorials, or watch the videos on the ZetaBIM YouTube channel.