如何在angular google地图中获取center_changed经纬度

<agm-map [latitude]="lat" [longitude]="lng" [ (centerChange)]="onCenterChange">
  <agm-marker [latitude]="lat" [longitude]="lng"></agm-marker>
</agm-map>

import { Component } from '@angular/core';

@Component({
  selector: 'app-map',
  templateUrl: './map.component.html',
  styleUrls: ['./map.component.css']
})
export class MapComponent {
  lat: number;
  lng: number;

  onCenterChange(event: any) {
    this.lat = event.lat;
    this.lng = event.lng;
    console.log('经度：', this.lng);
    console.log('纬度：', this.lat);
  }
}