Overview

In this part of the tutorial you are going to merge the pit and topographic DTMs.

Prerequisites

Required:

Created a new project and added all the required tutorial files i.e. the exercises on the Creating a New Project page.

Recommended:

Specified project and mine design settings i.e. the exercises on the Specifying Design Settings page.
Generated a pit DTM i.e. the exercises on the Generating a Pit DTM page.

Files required for the exercises on this page:

_vb_stopopt / _vb_stopotr
_vb_trc_pit240pt / _vb_trc_pit240tr

Link to Exercises

The following exercises are available on this page:

Merging the Pit and Topography DTMs

Exercise: Merging the Pit and Topography DTMs

In this exercise you are going to use boolean commands to generate a merged pit and topography wireframe surface using the _vb_trc_pit240tr/_vb_trc_pit240pt and _vb_stopotr/_vb_stopopt wirerframe objects .This includes the following tasks:

Defining data and view settings
Merging the pit and topography DTMs
Saving the merged wireframe object to a Datamine File.

Defining Data and View Settings

Select the Design window.
Select the Project Files control bar, Wireframe Triangles folder.
Select, drag-and-drop the following files into the Design window:
- _vb_stopotr
- _vb_trc_pit240tr
In the Sheets control bar, Design Overlays folder, select only the following overlays (i.e. display these overlays):
- Default Grid
- _vb_stopotr/_vb_stopopt (wireframe).
- _vb_trc_pit240tr/_vb_trc_pit240pt (wireframe)
In the Sheets control bar, Design Overlays folder, right-click _vb_stopotr/_vb_stopopt (wireframe), select Format
In the Format Display dialog, Overlays tab, Overlay Format group, Style sub-tab, Display As group, check that Faces is selected, click OK.
In the View Control toolbar, click Zoom All Data.
In the View Control toolbar, click View Settings.
In the View Settings dialog, define the Section Orientation and Mid-Point XYZ coordinate (6190, 5170, 100) and other parameters shown below, click OK:
In the Design window, check that your view is as shown below:

Merging the Pit and Topography DTMs

Select Wireframes | Boolean Operations | Extract Separate.
In the Extract Separate dialog, select the topography (object 1) and open pit (object 2) wireframe objects.
Clear both Verify check boxes.
Select the Output group options, check the other highlighted options, click OK:
In the Loaded Data control bar, check that the new Extract: _vb_stopotr/_vb_stopopt and _vb_trc_pit240tr/_vb_trc_pit240pt object is listed.
In the Sheets control bar, Design Overlays folder, select only the following overlays (i.e. display these overlays):
- Default Grid
- Extract: _vb_stopotr/_vb_stopopt and _vb_trc_pit240tr/_vb_trc_pit240pt.
In the Design window, check that your merged wireframe object is as shown below:
Select Format | VR View | Update VR Objects (vro).

In the VR window, rotate, zoom and pan the view and check that the merged wireframe consists of a green topography surface outside the pit and an orange pit surface inside the topography:

In the above wireframe extraction and merging process, the following wireframe surface portions were not retained :

pit above the topography
topography inside the pit.

When running this command, it may be necessary to run it a number of times before the desired result is obtained.

Saving the Merged Wireframe Object to a Datamine File

In the Loaded Data control bar, right-click on the Extract: _vb_stopotr/_vb_stopopt and _vb_trc_pit240tr/_vb_trc_pit240pt object, select Data | Save As.
In the Save New 3D Object dialog, click Single Precision Datamine (.dm) File.
In the Save New Strings dialog, select the path to you tutorial folder, define the File name: as 'trc_PitTopotr', click Save.
In the Loaded Data control bar, check that the Extract: _vb_stopotr/_vb_stopopt and _vb_trc_pit240tr/_vb_trc_pit240pt object has been replaced by trc_PitTopotr/trc_PitTopopt (wireframe).
Select File | Save.

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