Aside from actually being able to do what you suggest TMO and add 'Certified Cartographer' to your resume (which would be very cool indeed btw), I was wondering if the certification process could perhaps be used as a mini workshop of some sort, in which novices like myself could learn basic fundamentals and techniques of cartography and advance via quizzes.
I think Ascension mentioned something along the lines of degrees or level of proficiency. Maybe something like that could work.. pass the first quiz and become a novice, and then work your way up through apprentice, mapmaker, etc., until eventually earning your 'Cartographer' badge. And for all you veterans who are already masters, you'd have to set up a different set of guidelines to earn your Savant and Master Cartographer of the Elements & Arcane titles. Any merit to the idea.. or just a silly notion?