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location = CallGeoTaggingService(address);  
  
if (location != null)  
{  
    var dp = new DataProvider(ReturnFields.All);  
    var itemToEdit = dp.GetItem(itemUrl);  
  
    if (itemToEdit.Editable)  
    {  
          itemToEdit.ForceEditState();  
          itemToEdit.setFieldValue("latitude", location.Latitude);  
          itemToEdit.setFieldValue("longitude", location.Longitude);  
  
          itemToEdit.saveChanges();  
     }  
}