使用Mapbox GL JS切换图层

时间：2018-04-20 19:21:41

标签： data-visualization mapbox mapbox-gl-js cartography

我想在Mapbox GL JS中切换图层。我创建了一些部分工作的单选按钮，你可以从一层切换到另一层，但不能来回切换。

以下是我到目前为止切换图层的代码：

    var layerList = document.getElementById('toggle');
    var inputs = layerList.getElementsByTagName('input');

    function switchLayer(layer) {
        var layerId = layer.target.id;
        map.setLayoutProperty(layerId, 'visibility');
    }

    for (var i = 0; i < inputs.length; i++) {
    inputs[i].onclick = switchLayer;
    }

这里是其余代码（简化）和jsbin https://jsbin.com/cigekutiho/edit?html,output的链接

   <!DOCTYPE html>
   <html>
   <head>
   <meta charset=utf-8 />
   <title>Test</title>
   <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
   <link rel="stylesheet" type="text/css" href="css/style.css" />
   <script src='https://api.mapbox.com/mapbox.js/v3.1.1/mapbox.js'> 
   </script>
   <link href='https://api.mapbox.com/mapbox.js/v3.1.1/mapbox.css' rel='stylesheet' />
   <script src='https://api.mapbox.com/mapbox-gl-js/v0.44.1/mapbox-gl.js'></script>
   <link href='https://api.mapbox.com/mapbox-gl-js/v0.44.1/mapbox-gl.css' rel='stylesheet'/>
   <script src='https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-geocoder/v2.2.0/mapbox-gl-geocoder.min.js'></script>
   <link rel='stylesheet' href='https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-geocoder/v2.2.0/mapbox-gl-geocoder.css' type='text/css' />
   <link href='https://www.mapbox.com/base/latest/base.css' rel='stylesheet'/>
   <style>
   body { 
      margin: 0; 
      padding: 0;
   }

   #map { 
      position: absolute; 
      top: 0; 
      bottom: 0; 
      width: 100%; 
   }

   #toggle {
   position: absolute;
   padding: 10px;
   background: #dddddd;
   font-family: Helvetica;
  }

  .rounded-toggle {
  position: absolute;
  border: 1px solid rgba(0,0,0,0.4);
  font-family: Helvetica;
  width: 200px;
  height: 47px;
  text-align: center;
  margin-left: 550px;
  top: 10px;
  cursor: pointer;
  }
  </style>
  </head>

  <body>

  <div id='map'></div>
  <div class='rounded-toggle inline' id='toggle'>
     <input id='Test_A' type='radio' name='rtoggle' value='Test_A' checked='checked'>
     <label for='Test_A'>Test A</label>
     <input id='Test_B' type='radio' name='rtoggle' value='Test_B'>
     <label for='Test_B'>Test B</label>
  </div>

  <script>
mapboxgl.accessToken = 'pk.eyJ1IjoibGlhbWJvbHRvbnVrIiwiYSI6IjJyeWxEMzgifQ.OROtY7TDOwNOmAOfCZeo4w';

var map_zoom = L.mapbox.map('map');
map_zoom.removeControl(map_zoom.zoomControl);

var map = new mapboxgl.Map({
    container: 'map',
    style: 'mapbox://styles/liamboltonuk/cjfykyscf6i272snyorquvam6',
    attributionControl: false,
    minZoom: 13,
    center: [-0.042582, 51.518039]
});

map.on('load', function () {
map.addSource('Test_A', {
        type: 'vector',
        url: 'mapbox://liamboltonuk.bv937ecm'
    });
map.addLayer({
        'id': 'Test_A',
        'type': 'circle',
        'source': 'Test_A',
        'layout': 
        {
        'visibility': 'visible'
        },
        'paint': {
            'circle-radius': 4,
            'circle-color': {
            property: 'conct',
            type: 'interval',
            stops: [
                [1, '#00477a'],
                [700, '#00477a']
            ]
            },
        'circle-opacity': {
            stops: [
                [12, 1],
                [13, 0.75]
            ] 
        },
    },
        'source-layer': 'LAEI_2013_N0x-5pzq5d'
});
});

map.on('load', function () {
map.addSource('Test_B', {
        type: 'vector',
        url: 'mapbox://liamboltonuk.bv937ecm'
    });
map.addLayer({
        'id': 'Test_B',
        'type': 'circle',
        'source': 'Test_B',
        'layout': 
        {
        'visibility': 'none'
        },
        'paint': {
            'circle-radius': 4,
            'circle-color': {
            property: 'conct',
            type: 'interval',
            stops: [
                [1, '#66e8ff'],
                [700, '#66e8ff']
            ]
            },
        'circle-opacity': {
            stops: [
                [12, 1],
                [13, 0.75]
            ] 
        },
    },
        'source-layer': 'LAEI_2013_N0x-5pzq5d'
});
});

    var layerList = document.getElementById('toggle');
    var inputs = layerList.getElementsByTagName('input');

    function switchLayer(layer) {
      var layerId = layer.target.id;
      map.setLayoutProperty(layerId, 'visibility');
    }

    for (var i = 0; i < inputs.length; i++) {
      inputs[i].onclick = switchLayer;
    }

    </script>
    </body>
    </html>

2 个答案:

答案 0 :(得分：1)

Map.setLayoutProperty需要3个参数(layer, name, value)。所以要使图层不可见：

map.setLayoutProperty('my-layer', 'visibility', 'none');

然后再次使用：

map.setLayoutProperty('my-layer', 'visibility', 'visible');

答案 1 :(得分：0)

Mapbox为此提供了一些非常不错的入门代码。 See the docs或play with the actual code here 

<!DOCTYPE html>
<html>
<head>
    <meta charset='utf-8' />
    <title>Show and hide layers</title>
    <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
    <script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.53.1/mapbox-gl.js'></script>
    <link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.53.1/mapbox-gl.css' rel='stylesheet' />
    <style>
        body { margin:0; padding:0; }
        #map { position:absolute; top:0; bottom:0; width:100%; }
    </style>
</head>
<body>

<style>
    #menu {
        background: #fff;
        position: absolute;
        z-index: 1;
        top: 10px;
        right: 10px;
        border-radius: 3px;
        width: 120px;
        border: 1px solid rgba(0,0,0,0.4);
        font-family: 'Open Sans', sans-serif;
    }

    #menu a {
        font-size: 13px;
        color: #404040;
        display: block;
        margin: 0;
        padding: 0;
        padding: 10px;
        text-decoration: none;
        border-bottom: 1px solid rgba(0,0,0,0.25);
        text-align: center;
    }

    #menu a:last-child {
        border: none;
    }

    #menu a:hover {
        background-color: #f8f8f8;
        color: #404040;
    }

    #menu a.active {
        background-color: #3887be;
        color: #ffffff;
    }

    #menu a.active:hover {
        background: #3074a4;
    }
</style>

<nav id="menu"></nav>
<div id="map"></div>

<script>
mapboxgl.accessToken = 'pk.eyJ1IjoiYWFnb3N0aW5pLXBlb3JpYWdvdiIsImEiOiJjanRnMzdjYnkwcDAxM3ltcDNjaXkyNWgzIn0.NhV8nl5x6256q8F_-gVCtQ';
var map = new mapboxgl.Map({
    container: 'map',
    style: 'mapbox://styles/mapbox/streets-v11',
    zoom: 15,
    center: [-71.97722138410576, -13.517379300798098]
});

map.on('load', function () {
    map.addSource('museums', {
        type: 'vector',
        url: 'mapbox://mapbox.2opop9hr'
    });
    map.addLayer({
        'id': 'museums',
        'type': 'circle',
        'source': 'museums',
        'layout': {
            'visibility': 'visible'
        },
        'paint': {
            'circle-radius': 8,
            'circle-color': 'rgba(55,148,179,1)'
        },
        'source-layer': 'museum-cusco'
    });

    map.addSource('contours', {
        type: 'vector',
        url: 'mapbox://mapbox.mapbox-terrain-v2'
    });
    map.addLayer({
        'id': 'contours',
        'type': 'line',
        'source': 'contours',
        'source-layer': 'contour',
        'layout': {
            'visibility': 'visible',
            'line-join': 'round',
            'line-cap': 'round'
        },
        'paint': {
            'line-color': '#877b59',
            'line-width': 1
        }
    });
});

var toggleableLayerIds = [ 'contours', 'museums' ];

for (var i = 0; i < toggleableLayerIds.length; i++) {
    var id = toggleableLayerIds[i];

    var link = document.createElement('a');
    link.href = '#';
    link.className = 'active';
    link.textContent = id;

    link.onclick = function (e) {
        var clickedLayer = this.textContent;
        e.preventDefault();
        e.stopPropagation();

        var visibility = map.getLayoutProperty(clickedLayer, 'visibility');

        if (visibility === 'visible') {
            map.setLayoutProperty(clickedLayer, 'visibility', 'none');
            this.className = '';
        } else {
            this.className = 'active';
            map.setLayoutProperty(clickedLayer, 'visibility', 'visible');
        }
    };

    var layers = document.getElementById('menu');
    layers.appendChild(link);
}

</script>

</body>
</html>
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