numberOfCircles [int]:
Parameter of the optimization solver method: the number of circles. Together with the {@link AttributesOSM#stepCircleResolution}
this gives the number of points used by the optimization solver. If r is the radius of the most outer circle and k is the number
of circles the radii of the circles are r/k, 2 * r/k, ... (k-1) * r/k, r.