<!DOCTYPE html>
<html>
<head><meta charset='utf-8' /><title>mapbox 点、线、面工具</title><meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' /><script src='https://api.tiles.mapbox.com/mapbox-gl-js/v1.1.0/mapbox-gl.js'></script><link href='https://api.tiles.mapbox.com/mapbox-gl-js/v1.1.0/mapbox-gl.css' rel='stylesheet' /><style>body { margin:0; padding:0; }#map { position:absolute; top:0; bottom:0; width:100%; }</style>
</head>
<body><style>.calculation-box {height: 75px;width: 150px;position: absolute;bottom: 40px;left: 10px;background-color: rgba(255, 255, 255, .9);padding: 15px;text-align: center;}p {font-family: 'Open Sans';margin: 0;font-size: 13px;}
</style><script src='https://api.tiles.mapbox.com/mapbox.js/plugins/turf/v3.0.11/turf.min.js'></script>
<script src='https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-draw/v1.0.9/mapbox-gl-draw.js'></script>
<link rel='stylesheet' href='https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-draw/v1.0.9/mapbox-gl-draw.css' type='text/css'/>
<div id='map'></div>
<div class='calculation-box'><p>Draw a polygon using the draw tools.</p><div id='calculated-area'></div>
</div><script>
mapboxgl.accessToken = 'pk.eyJ1IjoiY2hlbndhbmdzaGFuIiwiYSI6ImNqaGp3djlxMTJwb2szZG50ZzBjbDQ1cWIifQ.Gp_2XohZMGO-a6e_treCQQ';
/* eslint-disable */
var map = new mapboxgl.Map({container: 'map', // container idstyle: 'mapbox://styles/mapbox/satellite-v9', //hosted style idcenter: [-91.874, 42.760], // starting positionzoom: 12 // starting zoom
});var draw = new MapboxDraw({displayControlsDefault: false,controls: {polygon: true,line_string:true,point:true,trash: true}
});
map.addControl(draw);map.on('draw.create', updateArea);
map.on('draw.delete', updateArea);
map.on('draw.update', updateArea);function updateArea(e) {var data = draw.getAll();var answer = document.getElementById('calculated-area');if (data.features.length > 0) {var area = turf.area(data);// restrict to area to 2 decimal pointsvar rounded_area = Math.round(area*100)/100;answer.innerHTML = '<p><strong>' + rounded_area + '</strong></p><p>square meters</p>';} else {answer.innerHTML = '';if (e.type !== 'draw.delete') alert("Use the draw tools to draw a polygon!");}
}</script></body>
</html>效果展示：
