Oh thank you for the suggestion.

Hello people of factorio.I request a little help. So i have the steam version of factorio and i just so happened to spawn in an island where there is no way out(i just found out its an island after like 10 hours of playing in the world).So now i want to edit the terrain to replace the water with ...

Kind of surprised you haven't gotten an answer for this by now. There are two simple ways to edit a used map (game save) with any version of Factorio (Steam included).

The first way: Explore to your Steam installation directory. You want Steam\steamapps\common\Factorio\bin\x64. In Windows Explorer ...