Vector Layer

This example uses OpenLayers v4.0.1. The latest is v.

#### Vector Layer

Example of a countries vector layer with country information.

The countries are loaded from a GeoJSON file. Information about countries is shown on hover and click. Zoom in a few times to see country name labels.

Related API documentation:

- ol.Map
,
- ol.View
,
- ol.format.GeoJSON
,
- ol.layer.Tile
,
- ol.layer.Vector
,
- ol.source.OSM
,
- ol.source.Vector
,
- ol.style.Fill
,
- ol.style.Stroke
,
- ol.style.Style
,
- ol.style.Text

Copy Edit
Vector Layer Example of a countries vector layer with country information. var style = new ol.style.Style({ fill: new ol.style.Fill({ color: 'rgba(255, 255, 255, 0.6)' }), stroke: new ol.style.Stroke({ color: '#319FD3', width: 1 }), text: new ol.style.Text({ font: '12px Calibri,sans-serif', fill: new ol.style.Fill({ color: '#000' }), stroke: new ol.style.Stroke({ color: '#fff', width: 3 }) }) }); var vectorLayer = new ol.layer.Vector({ source: new ol.source.Vector({ url: 'https://openlayers.org/en/v4.0.1/examples/data/geojson/countries.geojson', format: new ol.format.GeoJSON() }), style: function(feature, resolution) { style.getText().setText(resolution < 5000 ? feature.get('name') : ''); return style; } }); var map = new ol.Map({ layers: [ new ol.layer.Tile({ source: new ol.source.OSM() }), vectorLayer ], target: 'map', view: new ol.View({ center: [0, 0], zoom: 1 }) }); var highlightStyleCache = {}; var featureOverlay = new ol.layer.Vector({ source: new ol.source.Vector(), map: map, style: function(feature, resolution) { var text = resolution < 5000 ? feature.get('name') : ''; if (!highlightStyleCache[text]) { highlightStyleCache[text] = new ol.style.Style({ stroke: new ol.style.Stroke({ color: '#f00', width: 1 }), fill: new ol.style.Fill({ color: 'rgba(255,0,0,0.1)' }), text: new ol.style.Text({ font: '12px Calibri,sans-serif', text: text, fill: new ol.style.Fill({ color: '#000' }), stroke: new ol.style.Stroke({ color: '#f00', width: 3 }) }) }); } return highlightStyleCache[text]; } }); var highlight; var displayFeatureInfo = function(pixel) { var feature = map.forEachFeatureAtPixel(pixel, function(feature) { return feature; }); var info = document.getElementById('info'); if (feature) { info.innerHTML = feature.getId() + ': ' + feature.get('name'); } else { info.innerHTML = '&nbsp;'; } if (feature !== highlight) { if (highlight) { featureOverlay.getSource().removeFeature(highlight); } if (feature) { featureOverlay.getSource().addFeature(feature); } highlight = feature; } }; map.on('pointermove', function(evt) { if (evt.dragging) { return; } var pixel = map.getEventPixel(evt.originalEvent); displayFeatureInfo(pixel); }); map.on('click', function(evt) { displayFeatureInfo(evt.pixel); }); <div id="map" class="map"></div> <div id="info">&nbsp;</div>

    <!DOCTYPE html>
    <html>
      <head>
        <title>Vector Layer</title>
        <link rel="stylesheet" href="https://openlayers.org/en/v4.0.1/css/ol.css" type="text/css">
        <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
        <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
        <script src="https://openlayers.org/en/v4.0.1/build/ol.js"></script>
      </head>
      <body>
        <div id="map" class="map"></div>
        <div id="info">&nbsp;</div>
        <script>
          var style = new ol.style.Style({
            fill: new ol.style.Fill({
              color: 'rgba(255, 255, 255, 0.6)'
            }),
            stroke: new ol.style.Stroke({
              color: '#319FD3',
              width: 1
            }),
            text: new ol.style.Text({
              font: '12px Calibri,sans-serif',
              fill: new ol.style.Fill({
                color: '#000'
              }),
              stroke: new ol.style.Stroke({
                color: '#fff',
                width: 3
              })
            })
          });

          var vectorLayer = new ol.layer.Vector({
            source: new ol.source.Vector({
              url: 'https://openlayers.org/en/v4.0.1/examples/data/geojson/countries.geojson',
              format: new ol.format.GeoJSON()
            }),
            style: function(feature, resolution) {
              style.getText().setText(resolution < 5000 ? feature.get('name') : '');
              return style;
            }
          });

          var map = new ol.Map({
            layers: [
              new ol.layer.Tile({
                source: new ol.source.OSM()
              }),
              vectorLayer
            ],
            target: 'map',
            view: new ol.View({
              center: [0, 0],
              zoom: 1
            })
          });

          var highlightStyleCache = {};

          var featureOverlay = new ol.layer.Vector({
            source: new ol.source.Vector(),
            map: map,
            style: function(feature, resolution) {
              var text = resolution < 5000 ? feature.get('name') : '';
              if (!highlightStyleCache[text]) {
                highlightStyleCache[text] = new ol.style.Style({
                  stroke: new ol.style.Stroke({
                    color: '#f00',
                    width: 1
                  }),
                  fill: new ol.style.Fill({
                    color: 'rgba(255,0,0,0.1)'
                  }),
                  text: new ol.style.Text({
                    font: '12px Calibri,sans-serif',
                    text: text,
                    fill: new ol.style.Fill({
                      color: '#000'
                    }),
                    stroke: new ol.style.Stroke({
                      color: '#f00',
                      width: 3
                    })
                  })
                });
              }
              return highlightStyleCache[text];
            }
          });

          var highlight;
          var displayFeatureInfo = function(pixel) {

            var feature = map.forEachFeatureAtPixel(pixel, function(feature) {
              return feature;
            });

            var info = document.getElementById('info');
            if (feature) {
              info.innerHTML = feature.getId() + ': ' + feature.get('name');
            } else {
              info.innerHTML = '&nbsp;';
            }

            if (feature !== highlight) {
              if (highlight) {
                featureOverlay.getSource().removeFeature(highlight);
              }
              if (feature) {
                featureOverlay.getSource().addFeature(feature);
              }
              highlight = feature;
            }

          };

          map.on('pointermove', function(evt) {
            if (evt.dragging) {
              return;
            }
            var pixel = map.getEventPixel(evt.originalEvent);
            displayFeatureInfo(pixel);
          });

          map.on('click', function(evt) {
            displayFeatureInfo(evt.pixel);
          });
        </script>
      </body>
    </html>