How to project objects onto a Point Cloud

In Pythagoras, you can project geometry such as points or lines onto a point cloud. This is especially useful for working in 3D environments where the terrain data comes from LiDAR or drone scans.

When is this useful?

• You want to follow the 3D surface of a point cloud scan.

• You want to project linework for extraction or annotation onto a dense surface.

• You need accurate Z-values without creating a DTM first.

How it works

• Points: will snap to the Z-value derived from the point cloud at the X, Y position.

• Lines: are split into equal segments, based on the resolution of the point cloud.

• Geometry is updated to reflect the 3D surface of the scan.

How to project objects onto a point cloud

1. Select the points or lines you want to project.

2. Right-click the selection.

3. Choose: Edit > Project on Point Cloud > [Point cloud name].

VIDEO

Pythagoras calculates the Z-values based on nearby points in the cloud.

Project Objects on a Point Cloud from Pythagoras CAD on Vimeo.