index.html


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<!doctype html>
<html lang="en">
<head>
	<meta charset="utf-8">
	<title>Geo Feature Explorer</title>

	<link rel="stylesheet" href="https://openlayers.org/en/v4.1.0/css/ol.css" type="text/css">
</head>
<body>
	<div id="map"></div>

	<script src="https://openlayers.org/en/v4.1.0/build/ol.js"></script>
	<script>
		var raster = new ol.layer.Tile({
			source: new ol.source.OSM()
		});

		var wkt = 'POLYGON((10.689 -25.092, 34.595 ' +
				'-20.170, 38.814 -35.639, 13.502 ' +
				'-39.155, 10.689 -25.092))';

		var format = new ol.format.WKT();

		var feature = format.readFeature(wkt, {
			dataProjection: 'EPSG:4326',
			featureProjection: 'EPSG:3857'
		});

		var vector = new ol.layer.Vector({
			source: new ol.source.Vector({
				features: [feature]
			})
		});

		var map = new ol.Map({
			layers: [raster, vector],
			target: 'map',
			view: new ol.View({
				center: ol.proj.fromLonLat([2.3475075, 48.869163]),
				zoom: 16
			})
		});

		var select_click = new ol.interaction.Select({
			condition: ol.events.condition.click
		});
		select_click.on('select', function(e) {
			if (e.selected.length) {
				var feature = e.selected[0];
			}
		});

		map.addInteraction(select_click);
	</script>
</body>
</html>