Preparing the project
Once the project has been created and the survey data
imported, the site needs to be scanned for duplicate
points.
Change to Survey Mode, Editing Menu › Remove
Duplicates
|
Use height in
comparison |
Check this option in order to
remove points which are duplicated in horizontal,
vertical AND height ordinates as opposed to the
standard of horizontal and vertical ordinates
only. |
|
Retain line
information |
Check this option to transfer the line information
from deleted points to points being retained. |
|
Use filter |
Check this option in order to apply a point
filter by name and/or surface. |
Click OK to continue.
Any duplicate points will be removed from the
dtm. If the Output window is open the duplicate points
will be listed. To show the Output window, Windows
Menu › Toggle Output Window
The next step is to triangulate the dtm. There are two ways to generate
breaklines/featurelines.
Change to Terrain Mode, Model Menu › Triangulate
or Model Menu › Intelli-Lines (the differences
between Triangulation and Intelli-Lines is explained
in tech tip T30002)
Once the triangulation is complete, the breaklines and featurelines can
be shown. Settings Menu › Display Settings,
make sure the lines option is selected.
The final step before generating the 3D View is to
validate the model, this scans the triangulation to
ensure that there are no errors. This step can be
ignored, but during the 3D generation errors might
occur.
Model Menu › Validate Model
Select the surface to check, only one surface can be checked at a time.
If any errors are encountered an error message will
appear.
Clicking on OK, the program will automatically zoom into the problem
area.
Once the problem has been corrected, the validate
model function has to be re-run. When the validation
completes without any errors, the model has been
successfully scanned.
Note that the validation function only works with the data visible on
the screen, so make sure the whole dtm is visible at
all times.
Generating the 3D View
The next step is to create the 3D View of the project.
Change to Terrain Mode, Terrain Menu › 3D View › View
If the project has more than one surface, both surfaces can be
displayed in the 3D View.
Click OK to continue.
During the 3D generation the dtm will be shaded.
Error messages could appear if the Validate Model step was omitted.
After the generation is complete, the 3D view will be shown on screen.
In the 3D view dialog, there are various options available that will
allow you to manipulate the 3D view. All the functions
are explained in the online help. Online help is
accessed by pressing F1 on the keyboard.
The 3D view can also be exported as a bitmap or even
printed. This is done via the Output tab.
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