Nah ... Minimaps. They are perfectely sorted and easy to browse through ...
So here is an example: Its built up by 4*3 tiles. Their names are: Minimap\Map\map(x)_(y).blp so .. Its easy to see which tile it is since the name includes the coordinates.
These tiles are the ones at Azeroth_30_30 to Azeroth_33_32. So ... can you figure out which .adt you have? ..
(those images are as said 4*3 (=12) different images. Directely pulled out of the data.
So, conclusion: Minimaps are the easiest ones.