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Points, points & points - MapboxGL JS version
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset='utf-8' /> | |
| <title>Points, points & points - MapboxGL JS version</title> | |
| <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' /> | |
| <script src='https://npmcdn.com/@turf/turf/turf.min.js'></script> | |
| <script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.41.0/mapbox-gl.js'></script> | |
| <link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.41.0/mapbox-gl.css' rel='stylesheet' /> | |
| <style> | |
| body { | |
| margin:0; | |
| padding:0; | |
| } | |
| #map { | |
| position:absolute; | |
| top:0; | |
| bottom:0; | |
| width:100%; | |
| } | |
| #text { | |
| position: absolute; | |
| z-index: 1; | |
| bottom: 1em; | |
| left: 1em; | |
| padding: 15px; | |
| background-color: white; | |
| border: #0e0e0e 1px solid; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id='map'> | |
| <div id="text"> | |
| <h1 id="title">How Many Points...</h1> | |
| <div id="docs"> | |
| <p> | |
| Number of points to place on the map: | |
| <input id="num" value="1000" type="number"> | |
| <button id="draw">Draw</button> | |
| <button id="clear">Clear</button> | |
| </p> | |
| <p> | |
| This page is an <b>MapboxGL JS</b> demo port of this <a href="https://derekswingley.com/lab/olpts/">OpenLayers 2 Derek Swingley demo</a> | |
| </p> | |
| </div> | |
| </div> | |
| </div> | |
| <script> | |
| mapboxgl.accessToken = 'pk.eyJ1IjoidGhvbWFzZzc3IiwiYSI6Im5Yc3p3SW8ifQ.FtzS4C8q_UJpOhrVnJfQfg'; | |
| var map = new mapboxgl.Map({ | |
| container: 'map', // container id | |
| style: 'mapbox://styles/mapbox/streets-v9', // stylesheet location | |
| center: [-74.50, 40], // starting position [lng, lat] | |
| zoom: 9 // starting zoom | |
| }); | |
| map.addControl(new mapboxgl.NavigationControl()); | |
| var bounds = map.getBounds().toArray(); | |
| var flattenedBounds = [...bounds[0], ...bounds[1]]; | |
| map.on('style.load', function() { | |
| map.addSource('sample', { | |
| type: 'geojson', | |
| data: turf.random.randomPoint(Number(document.getElementById('num').value), { | |
| bbox: flattenedBounds | |
| }) | |
| }); | |
| map.addLayer({ | |
| "id": "point", | |
| "source": "sample", | |
| "type": "circle", | |
| "paint": { | |
| "circle-radius": 6, | |
| "circle-color": "#3399CC", | |
| "circle-stroke-width": 2, | |
| "circle-stroke-color": "#fff" | |
| } | |
| }); | |
| }); | |
| document.getElementById('draw').addEventListener('click', function(e) { | |
| var b = map.getBounds().toArray(); | |
| var flattenedB = [...bounds[0], ...bounds[1]]; | |
| var points = turf.random.randomPoint(Number(document.getElementById('num').value), { | |
| bbox: flattenedB | |
| }); | |
| map.getSource('sample').setData(points); | |
| }); | |
| document.getElementById('clear').addEventListener('click', function(e) { | |
| map.getSource('sample').setData({ | |
| "type": "FeatureCollection", | |
| "features": [] | |
| }); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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