What keeps the Water in on a Flat Earth?

One must understand that NASA and the governments control the most important information we have about the earth. Others through fact checking and testing are now finding many falsehoods and other facts about what has been told to us over many decades that bring the globe model into extra doubt. The flat earth model is drawing on ancient maps, text and drawings to reexamine the world we live on. This information claims that Antarctica is not a continent at the south pole but a massive land mass that circles the outside edge of the entire flat earth. There is a 200 foot ice wall that is encountered first, then a several thousand foot mountain range. Some believe there is a firmament or dome at the very outside edge. All of this keeps the oceans contained. The white area surrounding the flat earth map below would be Antarctica. Notice below that the UN uses a flat earth map as their logo on their flag.

Where’s the edge?