It looks neat but I have no idea how the clustering works or why uniform colors are assigned to large areas, e.g. the color blue in the pdf example.

Jare a day ago | parent [-]

open one and inspect the two ways to view it, one is horizontal scan, the other is a peano curve which leads to natural square-ish areas.

	▲	andai a day ago \| parent \| next [-]
		Interesting I thought it was a hilbert curve? (I don't know much about either of those though.)
	▲	bflesch a day ago \| parent \| prev [-]
		I can only see the color visualization and the hex view. Maybe I can't see the curve due to lack of WebGL?