For some reason this reminded me of quadtrees. Your "squooshing" would be removing central rows if they don't contain any points. Not a concrete answer but that's what your diagrams brought to mind.

Update: And there seems to be a Algorithm::QuadTree on CPAN that might get you started.

The cake is a lie.
The cake is a lie.
The cake is a lie.

In reply to Re: Distribute locations evenly on a map by Fletch
in thread Distribute locations evenly on a map by FloydATC

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