Problem in location map marker when open Google Map app

hello everyone …
when i open location with in my app then the google map app in android platform open and the location is correct but no marker on map like ? what is the problem !
so I need to show marker to get distance between my location and this marker.
thanks

  this.scheme = {
                    name: 'com.google.android.apps.maps',
                    appUrl: 'geo:',
                    browserUrl: 'https://www.google.com/maps/search/?api=1&query='
                };

           this.appAvailability.check(schemeInfo.name).then(

            () => { // success callback
                if (type == 'map' ){
                    window.open(schemeInfo.appUrl + url.longANDlati, '_system', 'location=no');
                }else{
                   
                    window.open(schemeInfo.appUrl + url, '_system', 'location=no');
                  
                } 
            },
            () => {  
              
                if (type == 'map'){
              
                    window.open(schemeInfo.browserUrl + url.longANDlati+'&q='+url.user_name);
                
                }else{
                    this.browserTab.openUrl(schemeInfo.browserUrl + url);
                 
                }
            }
        )