Those samples on the Wiki are worthless for making maps. They are much too low-resolution. Look at the large-sized maps on the Wiki; that will give you an idea of what size stuff you actually need.
Frankly, I'd just buy AoW if I were you. Works great under Wine if you don't have Windows, and it's only $6, IIRC.
Also, if you want to get a map approved for use by the dev team, don't just go and make one all on your own. Talk to us (or at least me), propose some layout ideas.
