It&#x27;s a <i>vastly</i> inferior implementation. Despite what the screenshot in the post hints to, the actual implementation only lets users connect the pins by straight lines. It doesn&#x27;t follow roads and it doesn&#x27;t do navigation. The reason for that is explained in the FAQ.<p>So it&#x27;s more or less what anybody would do on day 2 of learning the Google Maps API, plus the save routes (cough...) thing. With that I don&#x27;t intend to show disrespect for the author, because it has been going on for 10 years with people using it. Much better than anything I built for myself. I&#x27;m surprised that Google is going after him. If that &quot;re-implements or duplicates&quot; anything that Google does then almost everybody should receive a letter like that.<p>My guess is that the usage counter for this site eventually reached some limit (10 years for that), a program noticed and the legal department sent a semi automatic mail without an assessment of the service. Still it&#x27;s probably in their right to do so and it&#x27;s another reason to use Open Street Map to build this kind of services. Example: <a href="http:&#x2F;&#x2F;cycle.travel&#x2F;" rel="nofollow">http:&#x2F;&#x2F;cycle.travel&#x2F;</a> which does real routing. Furthermore OSM has many offroad tracks and it could make happy the kind of people using routebuilder.