var locations = [
   	{	letter: 'A',
   		name: 'Anna Frank House',
			lat: '52.3752585874657',
			lon: '4.88417387008667',
		address: 'Prinsengracht 267'
	},
   	{	letter: 'B',
   		name: 'Diamond Museum',
			lat: '52.35921517138004',
			lon: '4.882146120071411',
		address: 'Paulus Potterstraat 8'
	},
   	{	letter: 'C',
   		name: 'Van Gogh Museum',
			lat: '52.35864512660125',
			lon: '4.880772829055786',
		address: 'Paulus Potterstraat 7'
	},
   	{	letter: 'D',
   		name: 'Hermitage Amsterdam',
			lat: '52.36624511903265',
			lon: '4.902477264404297',
		address: 'Nieuwe Herengracht 14'
	},
   	{	letter: 'E',
   		name: 'Rembrandt House',
			lat: '52.369494371987656',
			lon: '4.901318550109863',
		address: 'Jodenbreestraat 4'
	},
   	{	letter: 'F',
   		name: 'The Maritime Museum',
			lat: '52.370778285097515',
			lon: '4.916338920593262',
		address: 'Kattenburgerplein 1'
	},
   	{	letter: 'G',
   		name: 'Rijksmuseum',
			lat: '52.35989004247363',
			lon: '4.8841845989227295',
		address: 'Jan Luijkenstraat 1'
	}
];

var locationCenter = { lat: '52.367948', lon: '4.903078' };
var locationZoom = 13;