http://lbs.amap.com/home/faq/#Q13
http://lbs.amap.com/smart/smarthard/
http://segmentfault.com/a/1190000000498434
http://www.cnblogs.com/milkmap/p/3834039.html
http://lbsbbs.amap.com/forum.php?mod=viewthread&tid=724&extra=page%3D1
