Google has an office in Kirkland, where I live, and I understand some folks work on Google Maps. The data in and around Kirkland is not great. I realized that people that live and work in Kirkland would probably have no reason to discover how bad the directions are - who would dogfood driving directions to the local office?

For years, several dozen points of interest in downtown Seattle were transposed into downtown Kirkland. It totally broke routing - if you tried to map a bus route from Kirkland to the Seattle Federal Building, it would give you a route that dumped you in a residential neighborhood in Kirkland.