1. A method for placing spine groups within a display, comprising the steps of: defining a shape within a display; placing groups of cluster spines circumferentially around the defined shape; identifying overlap between at least two of the spine groups; rotating one of the overlapping spine groups in one of a clockwise and anticlockwise direction away from the other overlapping spine group; determining that overlap exists between the rotated spine group and at least one of the other overlapping spine group and another placed spine group; and moving the rotated overlapping spine group in an outward direction away from the shape, wherein the steps are performed using a suitably-programmed computer.