A method of generating an electrophysiology map, using a computer, comprising: acquiring geometry information pertaining to an anatomical region, the geometry information comprising position information for a plurality of points in the anatomical region; acquiring electrophysiology information pertaining to the anatomical region, the electrophysiology information comprising a plurality of electrophysiological characteristics of the anatomical region; associating the geometry information with the electrophysiology information as a plurality of electrophysiology EP data points; accepting user input to select a first electrophysiological characteristic of the plurality of electrophysiological characteristics, a first filtering criterion for the first electrophysiological characteristic, and a first priority for the first electrophysiological characteristic; applying the first filtering criterion to the plurality of EP data points to output a first subset of the plurality of EP data points satisfying the first filtering criterion; accepting user input to select a second electrophysiological characteristic of the plurality of electrophysiological characteristics, a second filtering criterion for the second electrophysiological characteristic, and a second priority for the second electrophysiological characteristic; applying the second filtering criterion to the plurality of EP data points to output a second subset of the plurality of EP data points satisfying the second filtering criterion; outputting a three-dimensional graphical representation of the first and second subsets of the plurality of EP data points according to the first priority and the second priority, characterized in that outputting a three-dimensional graphical representation of the first and second subsets of the plurality of EP data points according to the first priority and the second priority comprises: rendering the graphical representation of the first subset of the plurality of EP data points preferentially to the graphical representation of the second subset of the plurality of data points if the first priority is higher than the second priority; and rendering the graphical representation of the second subset of the plurality of EP data points preferentially to the graphical representation of the first subset of the plurality of data points if the second priority is higher than the first priority. acquiring geometry information pertaining to an anatomical region, the geometry information comprising position information for a plurality of points in the anatomical region; acquiring electrophysiology information pertaining to the anatomical region, the electrophysiology information comprising a plurality of electrophysiological characteristics of the anatomical region; associating the geometry information with the electrophysiology information as a plurality of electrophysiology EP data points; accepting user input to select a first electrophysiological characteristic of the plurality of electrophysiological characteristics, a first filtering criterion for the first electrophysiological characteristic, and a first priority for the first electrophysiological characteristic; applying the first filtering criterion to the plurality of EP data points to output a first subset of the plurality of EP data points satisfying the first filtering criterion; accepting user input to select a second electrophysiological characteristic of the plurality of electrophysiological characteristics, a second filtering criterion for the second electrophysiological characteristic, and a second priority for the second electrophysiological characteristic; applying the second filtering criterion to the plurality of EP data points to output a second subset of the plurality of EP data points satisfying the second filtering criterion; outputting a three-dimensional graphical representation of the first and second subsets of the plurality of EP data points according to the first priority and the second priority, characterized in that outputting a three-dimensional graphical representation of the first and second subsets of the plurality of EP data points according to the first priority and the second priority comprises: rendering the graphical representation of the first subset of the plurality of EP data points preferentially to the graphical representation of the second subset of the plurality of data points if the first priority is higher than the second priority; and rendering the graphical representation of the second subset of the plurality of EP data points preferentially to the graphical representation of the first subset of the plurality of data points if the second priority is higher than the first priority. rendering the graphical representation of the first subset of the plurality of EP data points preferentially to the graphical representation of the second subset of the plurality of data points if the first priority is higher than the second priority; and rendering the graphical representation of the second subset of the plurality of EP data points preferentially to the graphical representation of the first subset of the plurality of data points if the second priority is higher than the first priority.