Arnis

Arnis turns real geographic data into playable Minecraft worlds. Select an area on its map, choose a new or existing world, and generate streets, buildings, and terrain from the location you picked. The project combines OpenStreetMap data with elevation datasets and offers settings for world scale, spawn position, and building interiors. It uses rule-based generation to translate map data into blocks.

Created by Louis Erbkamm, Arnis makes familiar places available as starting points for exploration and building. You could recreate the neighborhood you grew up in or generate a landscape for a new project. Detail depends on the available map data, and larger, denser areas demand more memory and processing time. The desktop application is free and open source; MapSmith, its browser-based generation service, is a separate paid option.