The starting island is small, isolated and completely lacking in food and trees. You want to use the chest option so you will have enough wood to build a boat.

It is a very large map that is mostly water.

There are seven villages that I have found and connected by rail though one is not of the main rail line.

It takes 25 to 30 minutes to ride the main rail line from one end to the other.

There are also two swamp huts and many temples though I have not bothered to keep the co-ordinates.

I have found a fortress under the ocean floor. It is huge but disjointed. It isn't all that far from the starting area and I have built an underground railway to it that can be accessed by one of the out buildings on the starting island.

There are 4 portals to the nether. One is near the starting island. The other is in a cave under the ocean (not all that far from the fortress). Other portals can be found at either end of the main railway though the more distant one does not go to the same place in the nether as the others.

I will not be doing anything with this map in the foreseeable future.