I like the concept but personally when I look at a resume I never* look at job titles anyways - they're effectively meaningless when compared between companies. Instead I read what they self-describe themselves to be doing, which is basically what you're doing albeit in visual form.
* Within a single company titles usually are meaningful, so title changes while staying at the same company I'll take note of - particularly promotions
* Within a single company titles usually are meaningful, so title changes while staying at the same company I'll take note of - particularly promotions