var Vector= new ol.layer.Vector({
              source: new ol.source.Vector({
                projection: 'EPSG:3857',
                url: 'coordenadas.GeoJSON', // File created in php code
                format: new ol.format.GeoJSON()
              }),
              style:  new ol.style.Style({
             stroke: new ol.style.Stroke({
             color: 'red',
             lineDash:[1],
             width: 1
            })})


        });


            var map = new ol.Map({
            target: 'map',
            layers: [
                new ol.layer.Tile({
                    source: new ol.source.BingMaps({
                    imagerySet: 'Aerial',
                    key:'XXXXXXXXXXXXXX'

            ],
            view: new ol.View({
            center : ol.proj.transform([-0.33126,39.569658],'EPSG:4326','EPSG:3857'),
            zoom: 13
            })

        });
        map.renderSync(5000);