Dig a hole to get some landfill, resulting in a hole of water. Then you can replace the land somewhere else...
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
In my factorio logs I'm seeing:
Warning! Sprite at {0,0; 128x128} from __LandMover__/graphics/landmover-tech.png is defined with 4 mipmap levels, but level 1 is expected to be at {128,0; 64x64} which is out of bounds of the source image.
