<< Click to Display Table of Contents >> Navigation:  Chapter 6 Cross-Sections > Cross Sections > Editing a Cross Section > Strata > Editing Strata > Add Boundaries

 

A strata boundary can also be drawn on the cross-section using the mouse. To draw the boundary select Popup > Add Boundary or click on the Add Boundary button on the toolbar. If the current strata has a top and bottom boundary the type of boundary will also need to be selected. The cursor will then change to a cross-hair. Enter the first point on the boundary and then draw the rest of the boundary using the left mouse button. There is no limit to the number of points that can be specified. The start and end points of the boundary must be on either a cross-section boundary or another strata. When you are finished drawing the boundary either double-click the left mouse button or select Popup > Done.

 

If the boundary has already been specified and contains multiple segments the Create New Segment message will be shown. Select whether to create a new segment or to re-specify the boundary of the existing segment. If you select to use an existing segment and there is more than one segment you will need to select the segment to use. If this is the first time the boundary has been specified the Create New Segment form will not be displayed.

 

When drawing a boundary it is possible to draw part of the boundary and then snap to another existing strata boundary. 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.