%NetAreaHash = ();
$LL = join (" ",$MinX,$MinY); #$MinX and $MinY are decimals
$UR = join (" ",$MaxX,$MaxY); #$MaxX and $MaxY are decimals
$Area = abs($MaxX - $MinX) * abs($MaxY - $MinY);
$NetAreaHash{$Area} = join (" ",$NetName,$LL,$UR,$Area); #$NetName is a string

#how do I numerically sort $NetAreaHash by $Area?

#how do I take the sorted $NetAreaHash and identify the N largest areas that do not overlap?  N will usually be 2, 4 or 8.