When you say "Will", that means you have a way of charting out a blueprint of your maps before actually making them? I usually just try to wing it, maybe that's my problem sometimes.
Seriously, that is one enormous map! And is that thing isolated out in the corner supposed to be a... boat, mayhaps? And the black space around it is water? It's a huge leap for me to make just by looking at it, but if my guess is right that would be some fantastic feature to move around to different island levels on a boat.