Map data is provided by 3rd parties, maybe they are switching to a new vendor?

Quote:
Geocoding data for map content in Google Local is provided under license by Navteq North America LLC ("NAVTEQ") and/or Tele Atlas North America, Inc. ("TANA") and/or other third parties, and subject to copyright protection and other intellectual property rights owned by or licensed to NAVTEQ, TANA and/or such other third parties.

From this page on Google Maps.
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Mark Cushman