[Solved] Loop json objects keys to add Google Maps data

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The issue with point variable beacause it is an array of point details. You have to add all markers one by one and here I am indicating the exact place where you have the issue.

let marker: Marker = this.map.addMarkerSync({
    title: 'Ionic',
    icon: 'blue',
    animation: 'DROP',
    position: this.point    // issue in here because trying to make the position by an array
});

The solution is to define a function to add markers by going through each point in point array and I am renaming it to points for the solution because it is meaningful.

// You can use forEach as well on points
for(var i = 0; this.points.length; i++){
    addMarker(points[i]);
}

addMarker(point: any){
    return this.map.addMarkerSync({
        title: 'Ionic',
        icon: 'blue',
        animation: 'DROP',
        position: point
    });
}

Full code is updated as follows,

import { HttpClient } from '@angular/common/http';

export class HomePage implements OnInit {

      points: Array<any> = [];
      Data: any;
      map: GoogleMap;

      constructor(private http: HttpClient) { }

      ngOnInit() {
        this.loadMap();
        this.getData();
      }

      loadMap() {
        this.map = GoogleMaps.create('map_canvas');
      }

      getData() {
        this.http.get("<URL>").
          subscribe((data) => {
            this.Data = JSON.parse(data.data);
            this.points = Object.keys(this.Data)
              .map(key => this.Data[key].airport.position)
              .map((position) => ({
                lat: position.latitude,
                lng: position.longitude
              }));
            this.points.forEach((point) => {
              this.addMarker(point);
            });
          });
      }

      addMarker(point: any) {
        return this.map.addMarkerSync({
          title: 'Ionic',
          icon: 'blue',
          animation: 'DROP',
          position: point
        });
      }   

}

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solved Loop json objects keys to add Google Maps data