Cutting a Hole on Terrain
Cutting a hole on the terrain removes the terrain texture while maintaining the original contours of the terrain. The objects or feature layers created on the terrain in the area of the hole are drawn on the original contours of the terrain.
To cut a hole on the terrain:
1. On the Objects tab, in the Terrain Objects group, click Hole on Terrain. The Hole on Terrain property sheet is displayed.
2. With the cursor in the 3D Window, click to add the first point of the hole.
3. Click again to add additional points of the hole until you have marked the entire shape.
4. Right-click to finish the hole.
Note: It is recommended to keep the number of hole points to the minimum required to define the shape. Adding unnecessary points may adversely affect performance.
5. Continue to edit the hole or close the property sheet to finish the operation.
Hole on Terrain Property Sheet Parameters
|
Object Parameter |
Activity |
|
Appearance |
|
|
Name |
Type the description or name of the Hole on Terrain. This text appears in the Project Tree as the name of the object. |
|
Activation Action |
Select the action to perform when selecting the Hole on Terrain from the Project Tree. |
|
Line Color |
Select the outline color for the Hole on Terrain. Click the Edit button to open the Color dialog, or type the color code in hexadecimal BBGGRR format (B = Blue channel 00-ff, G = Green channel 00-ff, R = Red channel 00-ff). |
|
Line Opacity |
Enter the opacity for the Hole on Terrain outline. The opacity is defined as a percentage, where 100% is opaque and 0% is transparent. |
|
Line Style |
|
|
Line Width |
Enter the Hole on Terrain line width. The width is measured in meters. |
|
Line Back Color |
Sets the Hole on Terrain line back color. The Hole on Terrain line back color is visible when the line pattern is set to non-solid patterns such as a dotted pattern. Click the Edit button to open the Color dialog, or type the color code in hexadecimal BBGGRR format (B = Blue channel 00-ff, G = Green channel 00-ff, R = Red channel 00-ff). |
|
Line Back Opacity |
Enter the Hole on Terrain line back opacity. The opacity is defined as a percentage, where 100% is opaque and 0% is transparent. |
|
Line Pattern |
Select the Hole on Terrain line pattern. You can choose between different line patterns, e.g., solid, dashed, dotted or a combination thereof. |
|
Line Spline |
Determines if the line around the Hole on Terrain is drawn as a curve based on its nodes. |
|
Timespan |
|
|
Start Time |
Click Edit and enter the date and time the hole on terrain should first become visible. |
|
End Time |
Click Edit and enter the date and time the hole on terrain should stop being visible. |
|
Position |
|
|
Altitude Method |
The altitude method used by the Hole on Terrain. Always set to On Terrain. |
|
Altitude |
The altitude of the Hole on Terrain is always set to zero, meaning on the surface of the terrain. |
|
X |
Enter the X-coordinate for the Hole on Terrain pivot point, the center of its base. |
|
Y |
Enter the Y-coordinate for the Hole on Terrain pivot point, the center of its base. |
|
MGRS |
The coordinates of the Hole on Terrain pivot point in Military Grid Reference System (MGRS) coordinates. This field is only available if Show MGRS Coordinates was selected in the Options dialog. See “View” in the “Using TerraExplorer Options” chapter for more information. |
|
Points Position |
|
|
The parameters in this group are enabled only when Edit Nodes |
|
|
Selected Point |
Select the point to edit. The selected point is highlighted on the 3D Window. When you edit this point, the corresponding point on the hole changes accordingly. |
|
Point X |
Enter the X-coordinate for the selected point. |
|
Point Y |
Enter the Y-coordinate for the selected point. |
|
Point MGRS |
The coordinates of the selected point in Military Grid Reference System (MGRS) coordinates. This field is only available if Show MGRS Coordinates was selected in the Options dialog. See “View” in the “Using TerraExplorer Options” chapter for more information. |
|
Point Altitude |
The altitude of all the points is always set to zero, meaning on the surface of the terrain. |
|
Visibility |
|
|
Default Viewing Distance |
Determines the viewing distance of the camera from the Hole on Terrain. This distance is used as a stop mark for any “Fly-to” or “View Object” operation. It is also used when selecting to edit the object from the Project Tree. When this value is set to the default of -1, TerraExplorer calculates and sets the ideal viewing distance for the Hole on Terrain based on its size. |
|
Max. Visibility Distance |
Sets the distance from the camera at which the Hole on Terrain disappears. |
|
Min. Visibility Distance |
Sets the minimal distance from the camera below which the Hole on Terrain disappears. |
|
General |
|
|
Show in Viewer |
Determines if the terrain hole appears in the Project Tree when the file is viewed with the TerraExplorer Basic viewer. |
|
Message |
The message associated with the object. The number displayed is the number of the message. To create a new message, or update an existing message, open the Create Message dialog by clicking in this field and selecting Edit. See “Using the Create Message Dialog” in the “Working with Objects” chapter for more information. |
|
Tooltip |
Type a tooltip text to appear when the mouse cursor is placed over the Hole on Terrain in the 3D Window. |
