http://mapki.com/wiki/Google_Map_Parameters
Intent { act=android.intent.action.VIEW dat=http://maps.google.com/maps?q=loc:31.99962285,118.73546605(Nanjing) cmp=com.google.android.apps.maps/com.google.android.maps.MapsActivity }
http://stackoverflow.com/questions/5740606/launch-google-maps-to-show-road-directions
<a href="http://maps.google.com/maps?q=address+goes+here ">View on Google Maps</a>
or
<a href="
http://maps.google.com/maps?q=loc:56.3456,-3.24456(name+for+location) ">View on Google Maps</a>