Abstract: A system for generating an electrophysiological (EP) map includes a display and a processor. The processor is configured to (i) receive multiple EP data points comprising respective locations and EP values, generated from signals acquired by one or more electrodes of a catheter that are in contact with tissue of a cardiac chamber, (ii) score the received data points with respective quality scores, (iii) for a given unit volume of the EP map, select, from among the data points whose locations fall in the unit volume, a data point with a highest quality score, for use in generating the EP map, and (iv) visualize the EP map to a user, on the display.