This puzzle is part of the Monthly Topic Challenge #1: Restricted Title: xkcd 1xxx
One for my fellow mapheads and pub quiz fans... There are many puzzles on PSE which use one-or-two-letter abbreviations to create coded messages - using, for example, country ISO codes, US state abbreviations, UK postcodes, or the Periodic Table. However, often we find ourselves quite limited in the messages we can create via these means, as their alphabets simply do not give much scope for a message of any real length or complexity.
In that vein, my question to you today is: What do you get if you combine two or more of these data sources? Use the images below to help you figure out the 12-letter answer (or, hang on, is it a 2-letter answer?!).
This puzzle will require much looking-up of information (use the links provided) or a good head for trivia. You have been TUNGSTEN-ARGENTINA-NORTHLONDON-ERAWALED...