Our transformation of Heliocentric velocities to Galactocentric velocities (﹩{\rm{\Theta }},{\rm{\Pi }},W﹩) for GCs with proper motions, compared to those in the Casseti catalog. The abscissas are from the Casseti online catalog, and the ordinates are our transformation values. The error bars are the uncertainties given in the Casseti catalog, and the gray line has a slope of one.