pso - degPerHorBlock*numHorBlocks_N, lso + degPerVerBlock*numVerBlocks_M,
pso - degPerVerBlock*numVerBlocks_M, lso + degPerHorBlock*numHorBlocks_N,
    public OMRect getBounds() {        if (bounds == null) {            bounds = new OMRect(pso, lso,                                 pso - degPerHorBlock*numHorBlocks_N,                                 lso + degPerVerBlock*numVerBlocks_M,                                 OMGraphic.LINETYPE_GREATCIRCLE);        }        return bounds;    }