groundPoint

A spot to stand on within radius of center: the floor of a random column nearest center's height. The floor block is at most 3 blocks above or 6 below center's block, so the spot is about 5 below to 4 above center's feet. Columns are spread evenly over the area within radius. Null over liquid or a long drop, inside solid ground, on a wall under a ceiling over center, or in an unloaded chunk.