Most people know where they want to move to when they are considering moving, and therefore a relocation chart can help you get to know yourself in the new place and what it's effects will be. Astro*chart*mapping is an interesting relocation technique, one that is useful to those people who want a change in living circumstances but actually don't know where they are going to move to, or are trying to choose between a few places (neighboring cities may not have much difference between them, but Paris or Detroit would be very different).
I utilize one or both methods, depending on the nature of your situation.