In one aspect, the present disclosure implements a method that determines whether a submitted image satisfies a geographic constraint which includes defining a rule that establishes a geographic restriction on the submitted image, accessing a geo-code associated with the submitted image, determining whether the geo-code indicates that the submitted image was taken at a location that violates the geographic restriction defined in the rule, and if a determination is made that the submitted image was taken at a location that violates the geographic restriction defined in the rule, eliminating the submitted image from being considered a valid entry in the contest.