In 2013 Google released Local carousels and New Google Maps, in June 2014, released Google My Business, combined with the Pigeon algo update; these are all major factors changing the Local search landscape.
moz.com conducted an in-depth survey of industry experts and published The 2014 Local Search Ranking Factors result.
Below is a chart from that 9/15/2014 report which provides a summary:
Check your business citation: PowerListing’s diagnostic scan
