/*I made Map N38.913E139.909 and 15level!*/
(() => {
var mymap = L.map("mymap").setView([38.913, 139.909], 15);
L.tileLayer('//{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',{
	attribution:
	'&copy; <a href="http://osm.org/copyright">OpenStreetMap</a>contributors'
}).addTo(mymap);

/*I made a operation area !*/
var root = [			
    [38.918127,139.911900],
    [38.919208,139.900126],
    [38.902379,139.898469],
    [38.901944,139.916015]
];
var ste = {			
    color: "orange",		
    opacity: 0.4,		
    weight: 9,
    opacity: 0.5
};
var plobj = L.polygon(root, ste).addTo(mymap);
})();