Abstract: A method and apparatus for correlating target data obtained from a first sensor for a subject target with target data obtained from a second sensor for a candidate target. The target data includes both target location and target classification dimensions. Target location data is processed to derive a missed distance Figure of merit indicative of a match in location between the subject target and candidate target. Target classification data is processed to derive a categorical Figure of merit indicative of the likelihood that a target having the classification of the subject target and a target having the classification of the candidate target would be co-located. The missed distance Figure of merit and the categorical Figure of merit are mathematically combined to output a measure of correlation related to the likelihood that the subject target and the candidate target are the same target.