A method for mapping, consisting of receiving aninitial set of measured values of a physiologicalparameter, which were measured at respective locations ina body organ and receiving a three-dimensional (3D) mapof the organ including an array of spatial map elements.The method includes forming a correspondence between therespective locations at which the measured values weremeasured and a sub-group of the map elements, and inresponse to the correspondence, associating respectiveelement values of the physiological parameter with mapelements other than the sub-group. The method furtherincludes adjusting the respective element values so thatcontiguous sets of the map elements form a geodesic, anddisplaying a map of the organ showing the adjustedelement values.
