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TerraScan User Guide

Navigation: Batch Processing Reference > Classification Routines > Points

By height from ground

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By height from ground

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By height from ground routine classifies points which are within a given height range compared to a reference surface. The surface can be temporarily created from points in one or several classes or a surface active in TerraModeler can be used. Most often, the previously classified ground class is used as the surface for classifying points above the ground level.

You might use this routine for to classify points into different vegetation classes for preparing, for example, building classification, powerline processing, or tree detection. As a result, the highest vegetation class should include all hits on the target objects of interest (building roofs, wires and towers, or trees).

byHeightFromGround

SETTING

EFFECT

Ground class

Point class(es) used for creating the reference surface or the name of a surface model that is active in TerraModeler.

_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 Ground class field.

Max triangle

Maximum length of a triangle edge in a temporary surface model.

From class

Source class(es).

To class

Target class.

Inside fence only

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

Min height

Minimum height above the reference surface. If a negative value is given, points below the reference surface are classified.

Max height

Maximum height above the reference surface. The value must be bigger than the value of Min height. If a negative value is given, points below the reference surface are classified.

TerraScan User Guide   26.07.2021   © 2021 Terrasolid Ltd