The Local team used Atlas, as well as the GroundTruth road-placement team, and the QA teams. There were different map layers and controls you could bring up.
Business category was funny because it had the most subjectivity to it. There was also a team in Hyderabad (that wouldn't make phone calls), and I once got into a dispute about whether "Olive Garden" is an American restaurant or an italian restaurant. :D
Yup, so part of the Atlas history for a POI is seeing problems that people have submitted onto a listing. When I was doing this a few years ago we had a humongous backlog of user feedback, but I'm under the impression now that they're mostly up to date.
Spammers were a huge problem. For businesses that don't want to advertise their brick-and-motor (a locksmith comes to you, not you to a locksmith) the policy was that they'd get one POI at the center of the city or zipcode they operated in. You'd think that locksmiths are bad, but florists are worse. Florists! They sell flowers to people! Horrible spammers. They also like to make fraudulent listings--- so they'll make a listing for "Competitor's Flowers" but have the phone number go to their business "Evil Flowers LLC".
Regarding florists, they're bad, completely agree. I weeded out a few mega-spam networks a few years ago before I gave up and focused on locksmith spammers. Garage door suppliers, handymen, carpet cleaners, movers, escorts, and lawyers! Lawyers are pretty bad, especially the ambulance chasers/accident attorneys.
Right now you can use Google Maps on your phone to add a missing place. This place will be approved (usually within an hour) by an Anonymous account bearing the "G" logo. Now while the POI may not display unless you are actively searching for the place or it's specific category, it will still appear on the map. This makes it even easier to crowd the map with useless information. I am sure it's an insult to those who painstakingly edit the map in MM with accurate information, only to be denied be an LE who knows nothing, and then seeing the useless entries like people's houses and spam get added immediately. What is Google's reasoning behind this?
It's all fairly easy to spam Google Maps from other avenues. I've seen bulk uploads of 100's of spam listings, the Google My Business product is also easily gamed, and the LEs don't appear to closely scrutinize locations in order to ensure that the business is where it's claimed to be, even though they have access to more detailed street view imagery and presumably can just Google it. Google in general, and LEs in particular, seem to have a policy of preserving all data, no matter how bad/spammy, and approving new POIs, even if the POI is of a questionable nature and isn't supported by the facts, which, again, points to a deficit in their training in being able to identify spam features for Maps. Once you know what spam is, it's fairly easy to identify, and the actual QC checks, primarily using government licensing databases and other resources, takes about 30 seconds or less to verify listings. The hard part, at least on my end, is removing it. Google loves to hang on to spam.
(Though it makes me feel better about taking an angle grinder to my door when I lost my keys a few years ago.)
(Incidentally, you made a wise choice.)
Similarly, local florists are great, but many of the florist ops on Google Maps are just resellers running out of a call center who tack on an extra fee for ordering the flowers for you.
Basically any business that is aimed at homeowners, but tends to be located away from residential areas, has a big inventive to create false locations.