function mp_init_map() {

	/*
	 * following variable are created by mp_locations.php
	 * - let locations = [{lat:xxx, lng:xxx}, {}...]
	 * - let icon_url
	 * - let icon_size[x, y]
	 */

	// default map center to france
	let map_center = {lat:46.227638, lng:2.213749};
	if (locations.length > 0)
		map_center = locations[0];
	let map = new google.maps.Map(
		document.getElementById("ljdp_map"),
		{
			zoom: 5,
			disableDefaultUI: true,
			center: map_center,
		}
	);
	let marker, icon, label;
	icon = {
		url: icon_url,
		scaledSize: new google.maps.Size(icon_size[0], icon_size[1]),
	};
	label = {
//		text: String(count),
		text: "hello",
		color: icon_label_color,
		fontSize: "12px",
	};
	let markers = [];
	for (loc of locations) {
		marker = new google.maps.Marker({
			position: loc,
			map: map,
			icon: icon,
	//		label: label,
		});
		markers.push(marker);
	};
	new markerClusterer.MarkerClusterer({ map, markers });
}