1. A method of estimating the location of an object within a geographical area based upon potential object location data reported by a plurality of mobile devices having location determining means, the method comprising: collecting potential object location data from the plurality of mobile devices, dividing the geographical area into a plurality of regions, and for at least some of the regions: determining information indicative of the distance between a point associated with a region and the potential object location reported by at least some of the mobile devices, and applying an estimator model to assign a score to the point indicative of a probability that the point corresponds to an actual object, the applying comprising generating histograms based on distances between the point and each potential object location and applying the estimator model to the histograms to generate the score for the point, and estimating the location of the object based upon the scores assigned to the points.