A method and system for printing an image such as a postal indicium. The system includes a method for determining estimation function values corresponding to a plurality of vertices on a first graph, where the first graph corresponds to a first route network. Also, a second surrounding sidewall that has a second base and an opposite second closure. Exemplary components may comprise one or more filter, amplifier, mixer, analog-to-digital converter, feedback loop, and equalizer andor post corrector.