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Revision as of 13:10, 21 February 2021 by Javascripter (talk | contribs) (added information about woldgen subregions, on other articles changed links here related to alignment to go directly to surroundings instead, removed links related to area blocks as I can't find a page on current wiki about area blocks)
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This article is about the current version of DF.

A region or subregion is continous set of tiles on the world map with the same or similar biomes and the same alignment. The entire region will be either evil, neutral, or good.

A region with 24 or fewer tiles is a small subregion, one with 25 to 99 tiles is a medium subregion, and one with 100 or more tiles is a large subregion.


Subregions must be the same or similar types of biomes. Some different biomes can occur in the same region as follows:

Region Type Biomes

Wetland Swamp, Marsh
Forest Broadleaf Forest, Conifer Forest, Taiga*
Grassland Grassland, Savanna, Shrubland
Hills Hilly Grassland, Hilly Savanna, Hilly Shrubland
Desert Sand Desert, Rocky Wasteland, Hilly Rocky Wasteland, Badlands
Tundra Tundra
Glacier Glacier
Ocean Ocean
Mountain Mountain

Temperature, Elevation, and Volcanism

Even if drainage and rainfall are the same in two tiles, if the temperature is different enough that one tile is a Tunda or Glacier and an adjacent tile is not they will be in different subregions.

Similarly, any tile with 300 or more elevation will be a mountain tile, and any tile with less than 100 elevation will be an ocean tile, neither of which form subregions with other land biomes. Volcanism is usually irrelevant for subregions, but a volcano tile adjacent to at least one mountain tile will be generated as if it had an elevation of 400, and will count as a mountain tile.

Additionally, during world generation lakes will sometimes be generated in the place of tiles that would usually have an elevation higher than 100, in which case they again do not form subregions with adjacent land tiles.