How does Google pick the businesses in the map pack?
Google says local results are based mainly on relevance, distance and prominence. Relevance is how well your profile matches the search. Distance is how far you are from the searcher or the place searched. Prominence is how well known the business is, including information from across the web such as links, articles and directories.
You cannot change distance. Relevance comes from a complete, accurate profile and a site that backs it up. Prominence is where links, citations and reviews come in, and that is the part our work touches.

