To create a surface
If you have three or more 3D points in the job, you can create a surface and store it as a triangulated terrain model (TTM) file in the current project folder. You can then use the surface to calculate a volume. See To compute a volume.
- In the map, select three or more 3D points.
- Tap and hold in the map and select Create surface.
-
Enter the surface name. Tap OK.
The surface is linked to the current job as an active map file and appears in the map.
To change the appearance of the surface
- In the map, tap
and select Settings. - In the Surfaces group, tap the check box(es) to show or hide:
- a color gradient
- surface triangles
- the sides of the surface
-
To raise or lower the surface when viewing from the map, enter a value in the Offset to DTM (Vertical) field .
To modify the surface
You may need to modify the surface before performing a volume calculation.
- Tap
and select Plan. -
In the map, select one or more triangles in the surface.
To modify the surface, you must have only one TTM model displayed in the map, which must be set to visible and selectable in the Active map layers screen. In addition, the Surface triangles check box must be selected in the map settings screen.
A triangle can be selected only if no other entities, such as points, are selected. To make triangle selection easier, hide other entities using the Filter softkey. To select triangles, the map must be in Plan view.
- Tap and hold in the map and select Delete selected triangles. This option is not available if you selected all the triangles in the surface.
- Tap OK.
