A marker system includes a marker, and a positioner coupled to the marker,
the positioner configured to position the marker from a first
predetermined position to a second predetermined position. A method of
providing a marker system includes obtaining a first data representative
of a first predetermined position, obtaining a second data representative
of a second predetermined position, and moving a set of one or more
markers from the first predetermined position to the second predetermined
position, wherein the set of one or more markers is moved using a
positioner. A method of using a marker system includes detecting a marker
when the marker is located at a first position, moving the marker from
the first position to a second position using a positioner, and detecting
the marker when the marker is located at the second position.