WinFence uses a unique snapping approach that can be used to quickly add layer, alteration zone, intrusion, and lense boundaries. The number of boundaries a strata has depends on the type of strata. Layers have a top and bottom boundary. Faults, lenses, alteration zones and intrusions have only one boundary. These boundaries can be defined by a series of points on the cross-section, or by the boundaries of other strata.
There are three methods for drawing boundaries: fully drawn, snapped or assigned. Snapped boundaries can be partially drawn and partially snapped. Snapped boundaries can include one or more different strata. In addition to snapping the strata boundaries can be assigned to the strata above or below.
Snapping is used to fix part of a strata’s boundary to a boundary of another strata. This approach allows the boundary of one strata to be fixed to the boundary of another. Making the input of strata boundaries quick and accurate. When drawing a boundary it is possible to draw part of the boundary and then snap to another existing strata boundary (i.e. fault).
To snap to an existing boundary double-click the left mouse button on the strata boundary. The remaining part of the boundary will then be formed from the snapped boundary. Snapping to a portion of another boundary can be used to quickly draw pinchouts and uncomformities.
Before you can draw a cross-section you must first create your strata. Most strata have two boundaries, a top and a bottom. Lenses, intrusions, and faults have only one boundary. To draw a boundary for a strata, select the strata and then right click anywhere on the cross-section. Select Add Boundary, Top or Bottom from the popup menu. Draw the boundary using the mouse, starting at the left side of the cross-section and finishing on the right side of the cross-section.
You can add as many points as desired and they do not have to be at the locations of the boreholes. When you are finished double click the mouse. Click the right mouse button and then select Previous Menu from the popup menu. That’s it, you have fully drawn this boundary.
To assign one boundary to another you must first create your strata you will assign the boundary to. Once the first strata has been created, select the strata to be assigned. Click the right mouse button to display the popup menu and select Use Existing Strata, and either the Top or Bottom boundary. The pointer will change to a hand.
Click on the strata that you want to assign this boundary to. If you are assigning the top boundary the strata should be above this strata and if you are assigning the bottom boundary the strata should be below this strata.
A lense only has one boundary, the boundary is normally formed by snapping it to the top or bottom boundary of another strata. To add the lense boundary, select the lense and then right click anywhere in the cross section to display the popup menu. Select the Add Boundary menu item, the pointer will change to a cross hair.
Click on the boundary of another strata to start drawing the lense (the boundary of the lense will be snapped to this strata from the left side of the cross-section to this point). Then add the points that define the lense. Finally snap the last point of the lense to the boundary of another strata or the same strata as before (the remaining boundary of the lense will be snapped to this strata from this point to the right side of the cross-section).