Move Object to Active Terrain Model Surface
Use this tool to define elevations to the selected objects with respect to terrain elevations.
Find it here:
MOUS_ICO Menu: Terrain > Terrain design > Move object to active terrain model surface
MOUS_ICO Toolbar: > Terrain design > Move object to active terrain model surface
Elevations are assigned at the break points (i.e., a straight line is given the calculated elevation at its end points, a polyline receives the calculated heights at every vertex).
Terrain elevations near the break points are read from the active database (Digital Terrain Model) and terrain elevation at the break point is calculated.
The calculated elevations will be assigned to the respective break points.
It is essential to check the project settings for the active terrain model.
The object can be modified as a plane surface (same elevations to all break points) or the object can be made to follow the terrain surface.
Also, a vertical offset can be assigned so as to lift or sink the object with respect to the terrain.
The entity will be changed to a 3D entity with constant height after executing the function.
To create additional break points to the entity, use the function 3D - lines.
Working Procedure
The dialog box 'Set Object Elevation' will pop up.
TMOD project
The active database (Digital Terrain Model) being used to read the elevations of the terrain surface is displayed at this field.
If the database displayed seems incorrect, exit the function and set the correct database using the function 'Project ID'.
Groupnumber - Use this button to administrate the setting for groups.
The dialog box 'Terrain Model Properties' follows with this button, which allows modifying the settings of the groups.
Groups can be turned active/passive, priority, level, etc.
For more details, refer the topic 'Terrain Model Properties - Groups'.
Featurecode - Use this button to administrate the settings for feature codes.
The dialog box 'Terrain Model Properties' follows with this button, which allows modifying the settings of the feature codes.
Feature codes can be turned active/passive; elevation of features can be included/excluded, etc.
For more details, refer to the topic 'Terrain Model Properties - Feature Code'.
Adjustment to terrain
Plane surface - All the break points are given the same elevation.
Among all the break points of the selected object, the calculated terrain elevation at the first break point of the object will be assigned to all the break points of the object.
Mark the radio button to activate the option.
Follows the terrain - The object will be modified such that it follows the terrain surface.
All the break points are given the elevation as that of the terrain at the respective locations so that the object follows the terrain.
The terrain heights are calculated and assigned to the break points.
Mark the radio button to activate the option.
The object raises (m)
Use this option to define the vertical offset for the object with respect to the terrain elevations.
A defined value adjusts the break points height relative to calculated terrain elevations at all the break points.
For example, 10.0 means the entity is adjusted 10.0m above the terrain, -2.0 positions the entity 2.0 m below the terrain.
Having defined all the parameters, click 'OK' to select the objects.
Command prompts for:
Select objects:
Select all the objects and finish with the right button of the mouse or press 'Enter' or the key 'Return'.
The selected objects will be assigned elevations. The objects will be converted to 3D entities.
Next topic: Offset 3D Lines