In a url we wish to set 3 points for the trip, not just two like this example:
http://maps.google.com/maps?saddr=49.34593,-123.1807&daddr=49.35037,-123.1749
How do we do that?
http://maps.google.com/maps?saddr=49.34593,-123.1807&daddr=49.35037,-123.1749+to:49.350,-123.17
I just added +to: and a third lat/lng. Your best bet is to just get the map the way you want it, then click the link icon in the upper right and pull out the generated URL.