OpenLayers 3 Beginner’s Guide

A drag-and-drop viewer for vector files

Open sample in a new windows

<!doctype html>
    <title>Drag 'n' Drop Vector Example</title>
    <link rel="stylesheet" href="../assets/ol3/css/ol.css" type="text/css" />
    <link rel="stylesheet" href="../assets/css/samples.css" type="text/css" />
    <div id="map" class="map"></div>
    <script src="../assets/ol3/js/ol-debug.js"></script>
      var tiledRaster = new ol.layer.Tile({
        source: new ol.source.OSM()

      var fill = new{
        color: 'rgba(0,0,0,0.2)'

      var stroke = new{
        color: 'rgba(0,0,0,0.4)'

      var circle = new{
        radius: 6,
        fill: fill,
        stroke: stroke

      var vectorStyle = new{
        fill: fill,
        stroke: stroke,
        image: circle

      // the draganddrop interaction allows us to drop files
      // onto the browser window. If the file matches one of the
      // format constructors, it will automatically extract
      // the features from the file and trigger an event
      var dragAndDrop = new ol.interaction.DragAndDrop({
        formatConstructors: [
      // we can use the event to create a new vector source
      // wiht the event's features and projection and add
      // it to the map with a new vector layer
      dragAndDrop.on('addfeatures', function(event) {
        var vectorSource = new ol.source.Vector({
          features: event.features,
          projection: event.projection
        map.addLayer(new ol.layer.Vector({
          source: vectorSource,
          style: vectorStyle
        var view = map.getView();
        view.fitExtent(vectorSource.getExtent(), map.getSize());
      var layer = new ol.layer.Tile({
        source: new ol.source.OSM()
      var center = ol.proj.transform([0, 0], 'EPSG:4326', 'EPSG:3857');
      var view = new ol.View({
        center: center,
        zoom: 1
      var map = new ol.Map({
        target: 'map',
        layers: [tiledRaster],
        view: view
      // we can add an interaction after creating the map with the default set