I have run into this problem when I was living in China and wanted to map hiking trip with my friends in HangZhou.<p>Wrote about it on my old blog in 2013: 
<a href="http:&#x2F;&#x2F;michalkow.tumblr.com&#x2F;post&#x2F;43214865761&#x2F;compensate-for-google-maps-inaccuracy" rel="nofollow">http:&#x2F;&#x2F;michalkow.tumblr.com&#x2F;post&#x2F;43214865761&#x2F;compensate-for-...</a>