So if you don't know the location of something, it just EXISTS -
   and the way to represent that is to attach it to the largest
   voxel, the world [or Universe or whatever] - without otherwise
   having to say where it is.* Good philosophical stuff for me
   here.[1]voxel-info   Ah here we go.* Back in time. Image
   Understanding in Unstructured Environment By Su-shing Chen, 1988

References

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   1. http://icopiedyou.com/wp-content/uploads/2015/06/voxel-info.jpg