网络加载JS和CSS

先要加载css，然后在加载js


<link rel="stylesheet" href="https://unpkg.com/leaflet@1.5.1/dist/leaflet.css"
   integrity="sha512-xwE/Az9zrjBIphAcBb3F6JVqxf46+CDLwfLMHloNu6KEQCAWi6HcDUbeOfBIptF7tcCzusKFjFw2yuvEpDL9wQ=="
   crossorigin=""/>

再加载js


 <!-- Make sure you put this AFTER Leaflet's CSS -->
 <script src="https://unpkg.com/leaflet@1.5.1/dist/leaflet.js"
   integrity="sha512-GffPMF3RvMeYyc1LWMHtK8EbPv0iNZ8/oTtHPx9/cc2ILxQ+u905qIwdpULaqDkyBKgOaB57QTMg7ztg8Jm2Og=="
   crossorigin=""></script>

初始化地图

这里有这几个逻辑：

1. 初始化map以及设置其view【view的作用是选择初始化坐标点和其层级】；

var mymap = L.map('mapid').setView([51.505, -0.09], 13);

2. setview的返回值是map；
3. 为map添加一个地板，这个地板使用了URL template；


L.tileLayer('https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token={accessToken}', {
	attribution: 'Map data &copy; <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="https://creativecommons.org/licenses/by-sahttps://cdn.jxasp.com:9143/image/2.0/">CC-BY-SA</a>, Imagery © <a href="https://www.mapbox.com/">Mapbox</a>',
	maxZoom: 18,
	id: 'mapbox.streets',
	accessToken: 'your.mapbox.access.token'
}).addTo(mymap);

在地图上做标记

增加一个mark


L.marker([51.5, -0.09]).addTo(mymap)
	.bindPopup("<b>Hello world!</b><br />I am a popup.").openPopup();

画一个圆


L.circle([51.508, -0.11], 500, {
	color: 'red',
	fillColor: '#f03',
	fillOpacity: 0.5
}).addTo(mymap).bindPopup("I am a circle.");

增加一个多边形


L.polygon([
	[51.509, -0.08],
	[51.503, -0.06],
	[51.51, -0.047]
]).addTo(mymap).bindPopup("I am a polygon.");

在地图上点击事件获得坐标

点击地图，弹出窗口显示当前坐标


var popup = L.popup();
 
function onMapClick(e) {
	popup
		.setLatLng(e.latlng)
		.setContent("You clicked the map at " + e.latlng.toString())
		.openOn(mymap);
}
 
mymap.on('click', onMapClick);

个人对这篇文档的体会

最近要搞GIS方面的东西，用了geoserver搭建本地GIS服务器，用echarts画小东西，在搜索资料中，发现了Leaflet，这个js地图框架，并且很多echarts地图都使用了他，本来是想百度下解决算了，但百度的东西，没有系统的教程，都是个人的笔记，在此不得不啃官方的资料，不过还好！可以接受。

完整代码！


<!DOCTYPE html>
<html>
<head>
	
	<title>Quick Start - Leaflet</title>
 
	<meta charset="utf-8" />
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	
	<link rel="shortcut icon" type="image/x-icon" href="docs/images/favicon.ico" />
 
    <link rel="stylesheet" href="https://unpkg.com/leaflet@1.5.1/dist/leaflet.css" integrity="sha512-xwE/Az9zrjBIphAcBb3F6JVqxf46+CDLwfLMHloNu6KEQCAWi6HcDUbeOfBIptF7tcCzusKFjFw2yuvEpDL9wQ==" crossorigin=""/>
    <script src="https://unpkg.com/leaflet@1.5.1/dist/leaflet.js" integrity="sha512-GffPMF3RvMeYyc1LWMHtK8EbPv0iNZ8/oTtHPx9/cc2ILxQ+u905qIwdpULaqDkyBKgOaB57QTMg7ztg8Jm2Og==" crossorigin=""></script>
 
 
	
</head>
<body>
 
 
 
<div id="mapid" style="width: 1024px; height: 768px;"></div>
<script>
 
	var mymap = L.map('mapid').setView([51.505, -0.09], 13);
 
	L.tileLayer('https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token=pk.eyJ1IjoibWFwYm94IiwiYSI6ImNpejY4NXVycTA2emYycXBndHRqcmZ3N3gifQ.rJcFIG214AriISLbB6B5aw', {
		maxZoom: 18,
		attribution: 'Map data &copy; <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors, ' +
			'<a href="https://creativecommons.org/licenses/by-sahttps://cdn.jxasp.com:9143/image/2.0/">CC-BY-SA</a>, ' +
			'Imagery © <a href="https://www.mapbox.com/">Mapbox</a>',
		id: 'mapbox.streets'
	}).addTo(mymap);
 
	L.marker([51.5, -0.09]).addTo(mymap)
		.bindPopup("<b>Hello world!</b><br />I am a popup.").openPopup();
 
	L.circle([51.508, -0.11], 500, {
		color: 'red',
		fillColor: '#f03',
		fillOpacity: 0.5
	}).addTo(mymap).bindPopup("I am a circle.");
 
	L.polygon([
		[51.509, -0.08],
		[51.503, -0.06],
		[51.51, -0.047]
	]).addTo(mymap).bindPopup("I am a polygon.");
 
 
	var popup = L.popup();
 
	function onMapClick(e) {
		popup
			.setLatLng(e.latlng)
			.setContent("You clicked the map at " + e.latlng.toString())
			.openOn(mymap);
	}
 
	mymap.on('click', onMapClick);
 
</script>
 
 
 
</body>
</html>