How to use features from Geojson in openlayers3? - openlayers-3

Question

I am using openlayers3 and i want to bring my features from feature.json, it seems when my map is loded I can get the feature file from network as xhr request but i am not able to see my polygons on map. Here below is my code
function showMap() {
var vector = new ol.layer.Vector({
projection: 'EPSG:5650',
source: new ol.source.Vector({
format: new ol.format.GeoJSON(),
projection: 'EPSG:5650',
url: 'feature.json'
})
});
var map = new ol.Map({
target: 'tilemap',
controls: ol.control.defaults({
attributionOptions: /** #type {olx.control.AttributionOptions} */ ({
collapsible: false
})
}),
layers: [
new ol.layer.Image({
source: new ol.source.ImageWMS({
url: 'http://www.geodaten-mv.de/dienste/adv_dop',
crossOrigin: null,
projection: 'EPSG:5650',
params: {
VERSION: '1.3.0',
LAYERS: 'mv_dop',
FORMAT: 'image/jpeg',
CRS: 'EPSG:5650'
}
})
}),vector
],
view: new ol.View({
projection: 'EPSG:5650',
center: [33355494, 5983295],
zoom: 10
})
});
DisplayTilesServices.setMap(map);
}

Answer 1

I was using olderversion of openlayers and now instead of Using url in source, now I am using features and it works!! see the code below
$http.get('feature.geojson').then(function(res){
var format = new ol.format.GeoJSON();
source=new ol.source.Vector({
projection: 'EPSG:5650',
features:format.readFeatures(res.data)
});
var vectorLayer = new ol.layer.Vector({
source: source
});
map.addLayer(vectorLayer);
},function(){})