By height from ground
Not Lite
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).
SETTING |
EFFECT |
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Ground class |
Point class(es) used for creating the reference surface or the name of a surface model that is active in TerraModeler. |
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. |