Seed (level generation)

Seeds are referred to the "Seeds" option when you are generating a new world. Implemented in Minecraft Beta 1.3, seeds make it so you can choose what type of world you spawn on. Minecraft players have the option at the beginning of the game to name their world, and add a "seed". This can be a series of numbers, letters, or symbols. A Seed works as a base number for a random generation of a map, in older versions when maps were randomly generated the seed was picked randomly.

Picture of the new title screen: http://i773.photobucket.com/albums/yy19/basatan/seedcraft.jpg

Some notable seeds include...

Note: Please move to x:0 and z:0 and documenting the map from there as the spawn location differs.

1 - A series of small islands, some which include small pools of water, and large amounts of sand/clay.

2 - Lots of stone mountains/canyons visible.

3 - Flat islands of sand.

4 - You are spawned in the middle of a desert.

5 - Flying stone cliff above water. Open air dungeon.

100 - Desert.

666 - Big desert.

87654321= Small grassy patch, surrounded by snow and ice.

1234567890 - Large flat grass areas.

l33t - Floating islands.

DIM-1 - Large overhangs, plenty of floating islands, several 'mountains', and a large snow biome with many Pine trees.

Mayor - Floating land structure near spawn.

Minecraft - Lots of wood near spawn, a beautiful world in general.

It has been confirmed that the same seed will result in the same map, the spawn location however is still random.

Some of these seeds were found because of this thread! Thank them :) - http://www.minecraftforum.net/viewtopic.php?f=3&t=189706