A while ago Robbie Alexander suggested to create a comparison map between WOTLK and Cataclysm.
@WyriMaps is there anyway you could lineup the different map layers so you can easily switch between them to quickly compare them? Thanks! — Robbie Alexander (@robbiealexandr) May 16, 2011
At that time I decided not to do it cause I didn’t have the old WOTLK map extracts anymore. Now I’m happy to make public I’ve been working bit by bit on this the past few weeks (it takes time to generate the needed map tiles). After aligning the continents, cutting the map into tiles and a bit of coding for the map it’s now up on http://compare.wyrimaps.net/ for your comparison adventures!