Multiple markers on Google Map with ionic

Ionic Native
1

Hi all !

I’m trying to get several markers on a simple google map. I’m using Ionic 3.
I’m loading the map like this :

import { Component, ViewChild, ElementRef } from '@angular/core';
import { GoogleMaps } from '@ionic-native/google-maps';

declare var google;

export class SearchResultsPage extends BasePage {

@ViewChild('map') mapElement: ElementRef;
private map: any;

constructor(public navCtrl: NavController, 
            public navParams: NavParams, 
            private translateService: TranslateService,
            private googleMaps: GoogleMaps) {}


  ionViewDidLoad() {
   setTimeout(()=>{
      this.loadMap();
   }, 1000)
  }

addMarkers(data, callback) {
      var markers = [{
            'position': {
            	lat: 48.8513735,
            	lng: 2.3861292
            },
            'icon': '#ff0000'
            }];
		function onMarkerAdded(marker) {
			console.log(marker);
			markers.push(marker);
			
			if (markers.length === data.length) {
				callback(markers);
			} else {
				console.log('in the else');
			}
		}

		data.forEach(function(markerOptions) {
			console.log('in foreach');
			this.map.addMarker(markerOptions, onMarkerAdded);
		});
	}

  loadMap() {
    let latLng = new google.maps.LatLng(48.8513735, 2.3861292);

    let mapOptions = {
      center: latLng,
      zoom: 15,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    }

    this.map = new google.maps.Map(this.mapElement.nativeElement, mapOptions);
  }
}

The map is showing, but not the markers. If someone has an idea, thanks by advance.