1. A method for locating features of a catheter for use in a localization system, comprising: providing a catheter catalog for use by the localization system, wherein the catheter catalog comprises reference data relating to features of a plurality of catheters, and wherein the reference data comprises electrical characteristics of one or more electrodes on a plurality of catheters; providing a catheter having at least one feature, reference data for the provided catheter being within the catheter catalog; placing the catheter into a localization field; creating a map with the localization field; locating the catheter on the map; correlating features of the catheter within the localization field with measurements made by the localization system when the features are at various locations.