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TerraScan User Guide

Navigation: Batch Processing Reference > Classification Routines > Points

Tunnel surfaces

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Tunnel surfaces

Not UAV

Tunnel surface routine classifies points collect inside tunnels. The routine classifies points on the tunnel roof, floor and walls. It requires the computation of normal vectors which can be done with the Compute normal vectors command or macro action. The normal vector direction should be turned towards the inside of the tunnel determined by either a trajectory or a vector element.

classify_tunnel_surfaces

SETTING

EFFECT

From class

Source class(es).

_select_classes

Opens the Select classes dialog which contains the list of active classes in TerraScan. You can select multiple source classes from the list that are then used in the From class field.

Floor to

Target class for points on the tunnel floor.

Roof to

Target class for points on the tunnel  roof.

Wall to

Target class for points on the tunnel walls.

Floor normal

Maximum angle off from vertical of the normal vector for points on the tunnel roof.

Roof normals

Maximum angle off from vertical of the normal vector for points on the tunnel floor.

Min count

Minimum amount of points per surface patch belonging to one target class. If a patch contains less points, it is added to the larger neighbouring class.

Smoothen roof/wall transitions

If on, the transition between roof and wall surface patches is smoothed.

Inside fence only

If on, points inside a fence or selected polygon(s) are classified.

TerraScan User Guide   01.01.2024   © 2024 Terrasolid Ltd