Projecting objects onto a terrain model

Pythagoras allows you to project 2D or 3D objects, such as points and lines, onto a terrain model (DTM). This is useful for ensuring that all geometry follows the terrain’s elevation data exactly.

When is this useful?

• You want your design lines to follow existing terrain elevation.

• You drew geometry in 2D and want to assign Z-values based on a DTM.

• You want to extract or verify heights based on a terrain model.

How it works

• Points: will adopt the Z-value of the terrain at their X, Y location.

• Lines: will be split into multiple segments that follow the triangle edges of the terrain model.

• A line will become a polyline; a polyline stays a polyline with updated heights for each vertex.

How to project objects onto a terrain model

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

2. Right-click the selection.

3. Choose: Edit > Project on DTM > [DTM name].

The selected objects are now linked to the elevation of the chosen terrain model.

VIDEO

The following video shows how to project objects on a terrain model: