Modify every element of array and assign them to variable by using promise

Question

I'm using a promise within map function and I want to assign every element of array; latitude and longitude properties. Here's the code for example:

$scope.dataset = response.map(function(item, index) {
   GeoCodingService.query({
      address: item.country
    }).$promise.then(function (response) {
      item.latitude = response.results[0].geometry.location.lat;
      item.longitude = response.results[0].geometry.location.lng;
      console.log(item);
      //result {id: "au", count: 593, country: "Australia", latitude: -25.274398, longitude: 133.775136}  
    });

    console.log(item);
    //result {id: "au", count: 593, country: "Australia"}
});

console.log($scope.dataset);
//result [undefined, undefined, undefined, undefined, undefined]

My goal is to obtain all the results with latitude and longitude where I get undefined i.e. in $scope.dataset variable.