how to add markers with OpenLayers 3

Question

I\'m trying to add makers on a OpenLayers 3 map.

The only example I have found is this one in the OpenLayers example list.

But the

Answer 1

there's a good tutorial at: http://openlayersbook.github.io

not tested but may helpful

var features = [];

//iterate through array...
for( var i = 0 ; i < data.length ; i++){
    var item = data[i];                                     //get item
    var type = item.type;                                   //get type
    var longitude = item.longitude;                         //coordinates
    var latitude = item.latitude;
    /*....
    * now get your specific icon...('..../ic_customMarker.png')
    * by e.g. switch case...
    */
    var iconPath = getIconPath(type);

    //create Feature... with coordinates
    var iconFeature = new ol.Feature({
        geometry: new ol.geom.Point(ol.proj.transform([longitude, latitude], 'EPSG:4326',     
        'EPSG:3857'))
    });

    //create style for your feature...
    var iconStyle = new ol.style.Style({
        image: new ol.style.Icon(/** @type {olx.style.IconOptions} */ ({
        anchor: [0.5, 46],
        anchorXUnits: 'fraction',
        anchorYUnits: 'pixels',
        opacity: 0.75,
        src: iconPath
        }))
    });

    iconFeature.setStyle(iconStyle);
    features.push(iconFeature);
    //next item...
}

/*
* create vector source
* you could set the style for all features in your vectoreSource as well
*/
var vectorSource = new ol.source.Vector({
    features: features      //add an array of features
    //,style: iconStyle     //to set the style for all your features...
});

var vectorLayer = new ol.layer.Vector({
    source: vectorSource
});
map.addLayer(vectorLayer);