start external map navigation from ionic 2 app for ios and android; needs cordova-plugin-geolocation

location.ts

startExternalMap() {
  if (this.location.latitude) {
    this.platform.ready().then(() => {
      Geolocation.getCurrentPosition().then((position) => {
        // ios
        if (this.platform.is('ios')) {
          window.open('maps://?q=' + this.location.name + '&saddr=' + position.coords.latitude + ',' + position.coords.longitude + '&daddr=' + this.location.latitude + ',' + this.location.longitude, '_system');
        };
        // android
        if (this.platform.is('android')) {
          window.open('geo://' + position.coords.latitude + ',' + position.coords.longitude + '?q=' + this.location.latitude + ',' + this.location.longitude + '(' + this.location.name + ')', '_system');
        };
      });
    });
  };
}

I had an issue with opening links to google maps app, from my Ionic app. The user location was not available so the user wasn't able to navigate.
This plugin solved the issue!

updated syntax for ios 11+ ionic 3

window.open('maps://?q=' + address, '_system');

import { InAppBrowser } from '@ionic-native/in-app-browser/ngx';

constructor(public iab:InAppBrowser)

OpenMap(address) {
this.iab.create("https://maps.google.com/maps?q=" + address, "_blank");
}