1. A method comprising: selecting an image associated with a street address that includes a building number; identifying, with a processor, a portion of the image containing characters associated with building numbers; extracting, with the processor, an alphanumeric value from the characters within the portion of the image; comparing the alphanumeric value to the building number of the street address; displaying, to a human operator and dependent upon the result of such comparison, the alphanumeric value and the portion of the image containing characters; receiving, from a human operator, an indication of whether the alphanumeric value is a building number; and storing, in a memory accessible by a processor, an association between the alphanumeric value and the image dependent upon the indication.