Question: what are the symbols in google maps?
Answer: Circle − google.maps.SymbolPath.CIRCLE.
Backward Pointing arrow (closed) − google.maps.SymbolPath.BACKWARD_CLOSED_ARROW.
Forward Pointing arrow (closed) − google.maps.SymbolPath.FORWARD_CLOSED_ARROW.
Forward Pointing arrow (open) − google.maps.SymbolPath.CIRCLE.