Generate Latitude/Longitude at the time of import using feed-import module.

//The Address field ( Country )
//The Address Variable is going to save the country
$country = 'China';
$point = geocoder('google',$country);
$type = $point->data['geocoder_address_components'][0]->types[0];
if($type!="country")
$point = geocoder('google',"South Africa");

$long=$point->coords[0];
$lat=$point->coords[1];
$country_long_name=$point->data['geocoder_address_components'][0]->long_name;
$country_code=$point->data['geocoder_address_components'][0]->short_name;


$node->field_success_story_location[LANGUAGE_NONE][0]['country']= $country_code;
$node->field_success_story_location[LANGUAGE_NONE][0]['latitude'] = $lat;
$node->field_success_story_location[LANGUAGE_NONE][0]['longitude']=$long;
$node->field_success_story_location[LANGUAGE_NONE][0]['address']=$country;