Hm, a bit of editing required Niek. Take a look at how it compares on the big map.
http://img3.imageshack.us/img3/763/overworld.png
1)Trees aren't lined right.
2) Cliff isn't right
Minor errors, but no big problem.
1) Your map is 320 x 205. The height of your map is the problem, because 205 isn't a multiple of 16. Therefore with those transitions are really hard to make, because you will have to count the pixels instead of counting the tiles. If you take a look at the cliff from beach area 3-1, you will notice the same. I thought I had pointed that out before. I can try to make it fit, but I don't think I can do it today. Because I will leave in 30 minutes and be away for the rest of the evening I think. (Going out for a nice dinner, with the family
)
2) I mentioned this in a previous post. I made a calculation error with the beach area 1-4. I used the cliff tiles from ALttP the Light World swamp just below Links house. I made the mistake of taking the high mountain tiles. If I would have taken the frontside of the high mountain tiles, then the entrance's doorstep would be on the lower half of the screen and no room for the statues. In the xcf file of the Tail Cave I've added an additional layer to patch this (I've added the image in this post as well). It was my mistake, and I hope this fixes it.
PS: I've not mentioned this before but the coconuts look great.