Messing with maps...

[Catone]

"Repeating patterns are reused"

That paragraph explains alot, least in my head it does.

[Lockirby2]

Yeah, I figured there was some shenanigans of that variety going on, with some of the things that I noticed were wasting space when I was editing the overworld maps for ROTDS. I started being more careful eventually trying to make my tiles more uniform in places where it didn't matter (like in the mountains, where I repeated the same tile a lot more in case it was compressing something like that). Not sure how much of a difference it made though.