Ive played around a little with the World-Generator to get a Map full of Water with Big Islands.
Here is what ive "created" :
![Image](http://s29.postimg.org/4syu5szz7/My_Map.jpg)
World Generator Settings:
![Image](http://s27.postimg.org/olbkipzyn/My_Map_Settings.jpg)
U can use this settings to create this World in Sandboxmode to take a little tour.
I have used Resource Spawner Overhaul with default Settings for it, but its not necessary to get this maplayout. Its just for more distance resources. I would use more alienspawns next time.
https://forums.factorio.com/forum/vie ... =14&t=4761
Map ExchangeString:
>>>AAAMAAgAAAAEBQYAAAAEAAAAY29hbAMDAgoAAABjb3BwZXItb3Jl
AwMCCQAAAGNydWRlLW9pbAMDAgoAAABlbmVteS1iYXNlAwMCCAAAAGl
yb24tb3JlAwMCBQAAAHN0b25lAwMCLwMAAOsEAAAcIwAAAAAAAAAAAA
ADAEBSt34=<<<
Not sure if the Exchangestring works without Resource Spawner Overhaul.
If you realy want endless Worlds, maybe you will need Aircraft, Fully Automated Raillayer or Landfillmod as i'am sure the Big Landmass will not be really endless in the end.