WMS:Vertices
Creating Vertices
New vertices can be created by selecting the Create Vertices tool from the Tool Palette and clicking in the Graphics Window where the new vertex is to be located. The x and y values of the vertex are determined by the position of the mouse cursor when a click is made. The z value must be entered separately. A default z value and other parameters governing the creation of new vertices can be set by selecting the TIN Options command from the TIN menu.
Deleting Vertices
Vertices can be deleted by selecting the vertex/vertices to be deleted and hitting the DELETE or BACKSPACE key on the keyboard or by selecting the Delete command from the Edit menu. If the Confirm deletions option is active, you will be prompted to confirm each deletion. This is helpful in preventing accidental deletions. The Confirm deletions flag can be toggled by selecting the Confirm Deletions item from the General tab of the Preferences dialog of the Edit menu.
Locked/Unlocked Vertices
Since it is possible to accidentally drag points, selected vertices can be "locked" to prevent them from being dragged or edited (using the Edit Window) by selecting the Vertices | Lock/Unlock command from the TIN menu. Any number of combinations of vertices can be locked or unlocked.
Locking and unlocking vertices provides a differentiation between points that are hard (measured data) and points that may be soft (interpolated or estimated data).
Selected vertices can be unlocked by selecting the Vertices | Lock/Unlock command from the TIN menu. The status of each vertex, locked or unlocked, is preserved in the TIN file when TINs are saved to disk. Display options can be changed so that a distinction between unlocked and locked vertices is easily visible.
