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Minecraft seed to map

Introduction to Seeds

Seeds are a part of the magic of Minecraft.
An entire world can be defined by an integer of 20 digits maximum: The seed.

The most important thing to know here is that Minecraft has to make a whole new terrain when you make a new world. Everything contained is determined by an algorithm based on procedural noise calculations, the Perlin noise.

By default, the seed is randomly generated, but you can force one manually. The number of possible worlds is limited to 2ep64, so about 18,446,744,073,709,551,616 worlds ! It's more than the total number of grains of sand on Earth. Now you know why Minecraft is called a sandbox game. So, from a human lifetime perspective, we can say it's unlimited.

The algorithm uses the seed, a factor that can be configured to determine the initial conditions. It's why you can recreate a world just from its seeds.
Because the world generation algorithm is deterministic, the larger your world, the more a pattern will appear, with repetition or areas. It's the downside of this generation mode, and there's no reason to play past a certain scale.

Note that the rendering of a world seed is entirely dependent on the Minecraft version because if the generation algorithm is updated, then your seed will no longer generate the same world. Sometimes it can be close, depending on the number of updates.