turf.featureCollection
Takes one or more Features and creates a FeatureCollection.
<!doctype html>
<html lang="en">
<head>
<link rel="stylesheet" href="https://rawcdn.githack.com/openlayers/openlayers.github.io/master/en/v5.3.0/css/ol.css" type="text/css">
<link rel="stylesheet" href="assets/css/styles.css" type="text/css">
<script src="//cdn.jsdelivr.net/npm/@turf/turf@5/turf.min.js"></script>
<script src="https://rawcdn.githack.com/openlayers/openlayers.github.io/master/en/v5.3.0/build/ol.js" type="text/javascript"></script>
<title>Turf and OpenLayers 3 - FeatureCollection</title>
</head>
<body>
<div id="map" class="map"></div>
<script type="text/javascript">
// Declare a GeoJSON source
var geojson_source = new ol.source.Vector({
projection: 'EPSG:3857'
});
// Tower of Bretagne without properties declared
var pt1 = turf.point([-1.5579479, 47.2175545]);
// Cranes of Nantes with properties defined
var pt2 = turf.point([-1.5741021, 47.1991929], {
name: 'Grue grise',
man_made: 'crane'
});
var pt3 = turf.point([-1.57007, 47.20507], {
name: 'Grue jaune',
man_made: 'crane'
});
var fc = turf.featureCollection([pt1, pt2, pt3]);
console.log(fc);
// Declare a source and directly embed the GeoJSON using the
// "experimental parameter "object"
var vectorSource = new ol.source.Vector({
features: (new ol.format.GeoJSON()).readFeatures(fc, {
featureProjection: 'EPSG:3857'
}),
projection: 'EPSG:3857'
});
// Declare a vector layer with the already
// created source containing added features
var vectorLayer = new ol.layer.Vector({
source: vectorSource,
style: [
new ol.style.Style({
image: new ol.style.Circle({
stroke: new ol.style.Stroke({
color: 'white'
}),
fill: new ol.style.Fill({
color: '#1f6b75'
}),
radius: 5
})
})
]
});
// Instanciate a map and add layers
var map = new ol.Map({
target: 'map',
layers: [
new ol.layer.Tile({
source: new ol.source.OSM()
}),
vectorLayer
],
view: new ol.View({
center: ol.proj.fromLonLat([-1.563046, 47.214751]),
zoom: 13
})
});
</script>
</body>
</html>