psscale - Plot a gray or color scale-bar on maps SYNOPSISpsscale refpoint [ [p|s]parameters ] [ cpt ] [ box ] [ zlo/zhi ] [ [max_intens|low_i/high_i] ] [ parameters ] [ z|Zparameters ] [ ] [ [i][gap] ] [ ] [ [p|dpi ]] [ ] [ ] [ ] [ region ] [ ] [ ...