Best thing is to take a compass with you or if you roughly know where north is then you can kind of imagine where makkah is from a map point of view. According to different madbhabs you can be within 90 or 180 degrees of the qiblahs direction
try this website http://www.qiblalocator.com/ , enter ur address at the top and then it will show u, change the view to satellite it will give u a better idea which way u have to pray inshAllah