step by step

4. create a div where you will put the map and add a template reference variable to it
   < div class="map" #mapElement>< / div >
5. give height to the div (empty divs usually have 0 height)
   .map { height: 90vh; }
6. select your div in the component
   @ViewChild('mapElement') mapElm: ElementRef;
7. place your map on the div
   this.map = new maps.Map(this.mapElm.nativeElement, {.. details here ..});