If one or more area feature(s) are selected,
the Create Area Skeletons option
will appear in the Advanced
Feature Creation Options sub-menu of the right-click menu. This option
can also be accessed in 3D View from the Advanced Feature Creation sub-menu
available of the Selection
Mode right-click menu.
The Create Area Skeletons (Center
Lines) option will allow the user to create a straight skeleton within
each selected area, these will be added as new line feature(s) will be
added to a new or existing layer of data using the Modify
Feature Info dialog.
In geometry, a straight skeleton is a method of representing a polygon
by a topological skeleton. It is similar in some ways to the medial axis
but differs in that the skeleton is composed of straight line segments,
while the medial axis of a polygon may involve parabolic curves. In the
following example, the green area is the original polygon, and the red
lines are the straight skeleton. The green represents the selected area
feature, with the red 'straight skeleton' representing the new, derived
line features.