fence_diagrams_in_minesight_3-d_v3.4.pdf

Fence Diagrams in MineSight 3-D, v.3.40 Page 1

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Fence diagrams are a new feature to MineSight 3-D, v.3.40. Fence diagrams are vertical cross-sections that bend and change direction as the section line traverses across the project area (Figures 1 and 2). They are a type of cross-section that is not orthogonal to, or associated with, any particular grid set. They are viewed in 2-D Fence mode, with the bends and kinks straightened out (Figure 3). All of the CAD functionality works using data located on fence diagrams.

Fence Diagrams ( ) in MineSight 3-D, v.3.40

Figure 2. This fi gure shows the same area as in Figure 1 with the surface objects closed. The polylines on the fence diagrams may have come from drillhole data interpretation - digitized on the fence diagram cross- sections, and then linked together to form the surfaces shown in Figure 1. Note that fences are defi ned by polylines. As in Figure 1, the white planes shown in this fi gure are for illustrative purposes only to show how the vertical fences cut across the project area.

Figure 1. This fi gure is an example of a GSM project showing fence diagram cross-sections that traverse across the project area. Fences are defi ned by polylines, and in this fi gure, the white planes are shown for illustrative purposes only, to show how fence diagrams are a vertical ribbon of sections.

Figure 3 shows three of the fi ve fence diagram sections from Figures 1 and 2. These 2-D fence views show how the sections are fl attened or straightened out with the bends and kinks removed.

Fence Diagrams in MineSight 3-D, v.3.40Page 2

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Figure 3 shows three of the fi ve fence diagram sections from Figures 1 and 2. These 2-D fence views show how the sections are fl attened or straightened out with the bends and kinks removed.

How to Create Fence Diagrams in MineSight 3-DDefi ne the cross-section fence lines by digitizing a standard polyline string or set of

strings. The polyline strings can be 3-D or 2-D polylines, and they do not have to be digitized on a horizontal plane. The fence line defi nes a vertical ribbon of sections that will be used in the slicing of the 3-D and 2-D data to be displayed in a fence view.

We recommend that the fence polylines be elements within the same geometry object and that they are named, via Element | Attribute (Figure 4). Putting the fence polylines in the same object will allow you to easily switch between planes. The element name will be used as the Plane name when the fence is attached to the viewer later on.

Figure 4. Query a polyline that is used as a fence line, and it is a standard polyline. Note, in this example, the polyline is named, a-a (circled in red on the query dialog).

There is a new icon on the main viewer dialog that looks like a picket fence (outlined in red in Figure 5). This icon sets the fence geometry in the viewer just like you would attach a grid set, an edit grid or an orthogonal plane to the viewer.

Figure 5. Shows the new fence icon (outlined in red). Notice the plane name, a-a is the polylines attributed name (also circled in Figure 4).

Click on the fence icon to attach the polylines as fences.

When the fi le chooser is displayed, select the geometry object that contains the fence


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polylines. The geometry object that contains the fence polylines can be closed or open. If the object is open, the contents will be displayed on the fence diagram, as are all open objects.

Once a fence geometry object has been attached to the viewer, select a polyline from the Plane list (or Filter list). This attaches the fence polyline as a vertical plane to the viewer to use for 2-D mode. The names of the polyline fence lines will be displayed in the pull-down Plane list (Figures 6a, 6b, and 6c). The names displayed in the planes pulldown list are taken from the name of the polylines (Figure 6a and see also Figure 5). If the polyline elements were not named, then default names are used: fence0, fence1, etc, for each polyline, as it was created in the fence geometry object (Figure 6b; there are four fence polylines in the selected geometry object). There can also be a mix of named and unnamed polylines in your fence geometry object (as shown in Figure 6c). Naming the polyline elements makes it easier and more convenient for you to keep track of the fence lines.

Figures 6a, 6b, and 6c. The planes list on the left (Figure 6a) show two planes listed by their attributed name, whereas the list in the middle (Figure 6b) shows four planes that use default names. The list on the right (Figure 6c) shows a mix of named planes and default names.

It is important to note that the Plane list is simply a Filter list since you are fi ltering elements which have a particular property the property being on a particular plane or fence.

Next click on the 2-D mode icon to put the viewer into 2-D fence mode and use the arrows to step from one fence plane to the next. Note: Historically, we said the viewer was going into planar view because of plane segments. Since fences have been added, this is now a fi lter list and can be made up of planes or fences.

To see grid lines, or fence posts, as shown in Figure 3, toggle ON Fence Posts, found on the Viewer Properties | Grids tab page dialog, there is a new toggle (Figure 7).

Figure 7. Viewer Properties | Grids tab page dialog. Circled in red is the new grids line toggle to control the fence posts lines when viewing fence data in 2-D fi lter mode. Be sure to toggle ON Grids at the top of the dialog to turn on any of the grids options.

All data that is open and displayed in the viewer that intersects the fence plane will be displayed in 2-D Fence, or fi ltered view, except model views (see Figures 1, 2, and 3). The view will have the bends and kinks straightened out.


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Hybrid ModeWhen the viewer is in 2-D Fence mode, the view is not rotatable. However, switching to

3-D mode with Plane Filter toggled ON, the same 2-D view is rotatable (as shown in Figure 8). This is called, hybrid mode. Note that in the hybrid mode case, the coordinate reporting cannot be accurate because the section is straightened out.

Figure 8 shows the fence diagram in 3-D hybrid mode. This view is in 3-D mode, using Plane Filter.

Working with Data on Fence DiagramsFences are not really true 2-D as such, but are a fi ltered 2-D view. The data is digitized

directly onto the fence cross-section. However, although data created on a fence can be viewed in 3-D, it is not selectable and is transient data because it really only exists on the fence plane.

Table 1 explains the relationship between 3-D data, true 2-D data and 2-D Fence data. Since a fl attened fence is not in the same space as normal 3-D space, the data has to be converted and represented as transient data. Similarly for 3-D data needing to be represented on the fence, it will be transient as well.

Data 3-D Data 2-D Data Fence Data

3-D view Actual Actual Transient2-D view Transient Actual TransientFence view Transient Transient Actual

Table 1. This shows the relationship between data types and 3-D, 2-D, and Fence 2-D geometry space. Use the function, Element | Convert Transient to Actual to convert transient data (2-D

fence data) to actual data (3-D data). Only actual data can be selected for editing when in 3-D viewing modes and used for certain CAD functions (e.g., triangulate. Note: the linker tool no longer requires data to be selected.). Converting transient data to actual data just makes a copy of the data into the current Edit Object. The original transient data is left unchanged and can be edited and changed on the fence with which it is associated.

Fence diagrams can simply be used as a display tool for plotting or they can be used for both surface and solids interpretation. Figures 9, 10, and 11 illustrate an example using solids.


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Figure 9. This is a view of three simple geologic solids, showing the trace of two fence diagrams (a-a and b-b).

Figure 10. Seen in 3-D, shows an oblique view of the data shown in Figure 9. The white planes are illustrative to show how the vertical fence planes cut across the project area. Figure 10a, on the left, shows the fence planes and the 3-D solids that are cut. Figure 10b, on the right, shows the geologic cross-section through the solids (without the solids in the picture).


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Figures 11a and 11b are 2-D fence view cross-sections of the same data shown in Figures 9 and 10. The fence views are fl attened or straightened out with the bends and kinks removed.

Another application of fence diagrams is in the creation of stretched drive diagrams that might occur along curved or angular underground workings, as shown in Figures 12a, 12b, and 12c.

Figure 12a on the left, is a 3-D view showing a driveline polyline (in yellow) that traverses through an orebody (represented as the pink solid). Figure 12b in the middle, is a 2-D view of the driveline and the orebody solid as displayed on an edit grid. Figure 12c on the right, is a fence diagram cross-section through the solid using the driveline polyline as the fence line. This again illustrates how fence diagram cross-sections are fl attened with the bends and kinks straightened or stretched out.

Fence diagrams are one of the many new tools and functions in MineSight 3-D, v. 3.40.

fence_diagrams_in_minesight_3-d_v3.4.pdf

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