Example of a map with layer group.
<!DOCTYPE html> <html> <head> <title>Layer group example</title> <script src="https://code.jquery.com/jquery-1.11.2.min.js"></script> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css"> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script> <link rel="stylesheet" href="http://openlayers.org/en/3.8.1/css/ol.css" type="text/css"> <script src="http://openlayers.org/en/3.8.1/build/ol.js"></script> <style> #layertree li > span { cursor: pointer; } </style> </head> <body> <div class="container-fluid"> <div class="row-fluid"> <div class="span6"> <div id="map" class="map"></div> </div> <div id="layertree" class="span6"> <h5>Click on layer nodes below to change their properties.</h5> <ul> <li><span>OpenAerial layer</span> <fieldset id="layer0"> <label class="checkbox" for="visible0"> <input id="visible0" class="visible" type="checkbox"/>visibility </label> <label>opacity</label> <input class="opacity" type="range" min="0" max="1" step="0.01"/> <label>hue</label> <input class="hue" type="range" min="-3.141592653589793" max="3.141592653589793" step="0.01"/> <label>saturation</label> <input class="saturation" type="range" min="0" max="5" step="0.01"/> <label>contrast</label> <input class="contrast" type="range" min="0" max="2" step="0.01"/> <label>brightness</label> <input class="brightness" type="range" min="-1" max="1" step="0.01"/> </fieldset> </li> <li><span>Layer group</span> <fieldset id="layer1"> <label class="checkbox" for="visible1"> <input id="visible1" class="visible" type="checkbox"/>visibility </label> <label>opacity</label> <input class="opacity" type="range" min="0" max="1" step="0.01"/> <label>hue</label> <input class="hue" type="range" min="-3.141592653589793" max="3.141592653589793" step="0.01"/> <label>saturation</label> <input class="saturation" type="range" min="0" max="5" step="0.01"/> <label>contrast</label> <input class="contrast" type="range" min="0" max="2" step="0.01"/> <label>brightness</label> <input class="brightness" type="range" min="-1" max="1" step="0.01"/> </fieldset> <ul> <li><span>Food insecurity layer</span> <fieldset id="layer10"> <label class="checkbox" for="visible10"> <input id="visible10" class="visible" type="checkbox"/>visibility </label> <label>opacity</label> <input class="opacity" type="range" min="0" max="1" step="0.01"/> <label>hue</label> <input class="hue" type="range" min="-3.141592653589793" max="3.141592653589793" step="0.01"/> <label>saturation</label> <input class="saturation" type="range" min="0" max="5" step="0.01"/> <label>contrast</label> <input class="contrast" type="range" min="0" max="2" step="0.01"/> <label>brightness</label> <input class="brightness" type="range" min="-1" max="1" step="0.01"/> </fieldset> </li> <li><span>World borders layer</span> <fieldset id="layer11"> <label class="checkbox" for="visible11"> <input id="visible11" class="visible" type="checkbox"/>visibility </label> <label>opacity</label> <input class="opacity" type="range" min="0" max="1" step="0.01"/> <label>hue</label> <input class="hue" type="range" min="-3.141592653589793" max="3.141592653589793" step="0.01"/> <label>saturation</label> <input class="saturation" type="range" min="0" max="5" step="0.01"/> <label>contrast</label> <input class="contrast" type="range" min="0" max="2" step="0.01"/> <label>brightness</label> <input class="brightness" type="range" min="-1" max="1" step="0.01"/> </fieldset> </li> </ul> </li> </ul> </div> </div> </div> <script> var map = new ol.Map({ layers: [ new ol.layer.Tile({ source: new ol.source.MapQuest({layer: 'sat'}) }), new ol.layer.Group({ layers: [ new ol.layer.Tile({ source: new ol.source.TileJSON({ url: 'http://api.tiles.mapbox.com/v3/' + 'mapbox.20110804-hoa-foodinsecurity-3month.jsonp', crossOrigin: 'anonymous' }) }), new ol.layer.Tile({ source: new ol.source.TileJSON({ url: 'http://api.tiles.mapbox.com/v3/' + 'mapbox.world-borders-light.jsonp', crossOrigin: 'anonymous' }) }) ] }) ], target: 'map', view: new ol.View({ center: ol.proj.fromLonLat([37.40570, 8.81566]), zoom: 4 }) }); function bindInputs(layerid, layer) { var visibilityInput = $(layerid + ' input.visible'); visibilityInput.on('change', function() { layer.setVisible(this.checked); }); visibilityInput.prop('checked', layer.getVisible()); $.each(['opacity', 'hue', 'saturation', 'contrast', 'brightness'], function(i, v) { var input = $(layerid + ' input.' + v); input.on('input change', function() { layer.set(v, parseFloat(this.value)); }); input.val(String(layer.get(v))); } ); } map.getLayers().forEach(function(layer, i) { bindInputs('#layer' + i, layer); if (layer instanceof ol.layer.Group) { layer.getLayers().forEach(function(sublayer, j) { bindInputs('#layer' + i + j, sublayer); }); } }); $('#layertree li > span').click(function() { $(this).siblings('fieldset').toggle(); }).siblings('fieldset').hide(); </script> </body> </html>