zoom img using CSS3 transition & transform

imgScale.css

.map { 
	 display: block;
	 overflow: hidden;
}
.map span{
	display: block;
	height: 250px;
	background:url(../img/map.jpg) no-repeat top left;

	transition: transform 0.2s linear 0s;
}

.map:hover span{
	background-position:0 -250px;
	
	transform: scale(1.25);
}