For the last 17 years the Environment Agency has used lasers to map and scan the English landscape from above to support flood modelling and efforts to track changing coastal habitats. As part of its commitment to go open, and release all of its commercial datasets by 2018, in September last year the agency made its LIDAR (Light Detection and Ranging) dataset open.
Since opening this data, some interesting uses have emerged, from vineyard planning to plotting archaeological sites. But perhaps the most unusual use is by players of Minecraft, a game in which users dig and build different kinds of 3D blocks within a large world of varying terrains and habitats. Players of this game have requested the LIDAR data to help them build realistic virtual worlds.
The national mapping authority Ordnance Survey has also used its own open data products to build a virtual version of Great Britain for Minecraft. (Source)