Polygon icon

by Vladimir Vershinin

HTML

<script src="https://unpkg.com/vue@latest/dist/vue.min.js"></script>
<script src="https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io/en/v5.3.0/build/ol.js"></script>
<script src="https://unpkg.com/[email protected]/lib/index.umd.js"></script>
<link rel="stylesheet" href="https://unpkg.com/[email protected]/lib/style.css">
<div id="app">
  <vl-map ref="map" data-projection="EPSG:4326">
    <vl-view ref="mapView" :zoom.sync="zoom" :center.sync="center"></vl-view>
    
    <vl-layer-tile>
      <vl-source-osm></vl-source-osm>
    </vl-layer-tile>
    
    
    <vl-layer-vector id="polygons">
      <vl-source-vector ref="polygonsSource" :features="polygons"></vl-source-vector>
      <vl-style-func :factory="createStyleFunc"></vl-style-func>
    </vl-layer-vector>
    
  </vl-map>
</div>

CSS

html, body, #app {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

JavaScript

new Vue({
	el: '#app',
  data () {
  	return {
    	zoom: 2,
      center: [0, 0],
      polygons: [
      	{
        	type: 'Feature',
          id: 'two',
          properties: {},
          geometry: {
          	type: 'Polygon',
            coordinates: [[
            	[-20, -20],
              [-20, -10],
              [-10, -10],
              [-10, -20],
              [-20, -20],
            ]],
          },
        },
      ],
    }
  },
  methods: {
  	createStyleFunc () {
    	// define basic polygon styles
      let baseStyle =	new ol.style.Style({
        fill: new ol.style.Fill({
          color: '#4CAF50AA',
        }),
        stroke: new ol.style.Stroke({
          color: '#4CAF50',
          width: 2,
        }),
      })
			let iconStyle = new ol.style.Icon({
        src: 'https://maps.google.com/mapfiles/kml/shapes/gas_stations_maps.png',
      })
    	
    	return feature => {
      	let point = new ol.geom.Point(VueLayers.olExt.findPointOnSurface(feature.getGeometry()))
      
      	return [
        	baseStyle,
          new ol.style.Style({
          	image: iconStyle,
            geometry: point,
          }),
        ]
      }
    },
  },
})