ios - adjust annotation view frame while drawing path using google cordinates -

i set image in annotation view. , put 2 difference annotation path between 2 pin annotation view frame not adjust properly. want annotation bottom part touch @ start of path , end of path.

i tried use native pin place @ perfect place. how can set proper frame custom annotation view.

i got solution set center offset this.

customannotationview.centeroffset = cgpointmake(-10, -10);