Attaching an SVG version of the PDF, with the content split into layers, and most nested group levels resolved (only the parent group for each color does have a clip to limit the dots to the page area).
Done with Inkscape 0.48.2 on Mac OS X 10.5.8 (i396) (MBP Intel C2D, 2.4 GHz, 2 GB RAM) - most while running inkscape inside gdb. The repeated ungrouping and moving the resulting paths to a new layer does take its time of course (vacuuming the defs afterwards to get rid of the clip-paths is quite fast OTOH) .
After splitting the content onto different layers, the lines on the layer 'grid' have been created with the pencil tool, snapping to path intersections (without hangs) - with the layers of the red/green/blue data points hidden, to avoid unnecessary snap candidates ;)
Attaching an SVG version of the PDF, with the content split into layers, and most nested group levels resolved (only the parent group for each color does have a clip to limit the dots to the page area).
Done with Inkscape 0.48.2 on Mac OS X 10.5.8 (i396) (MBP Intel C2D, 2.4 GHz, 2 GB RAM) - most while running inkscape inside gdb. The repeated ungrouping and moving the resulting paths to a new layer does take its time of course (vacuuming the defs afterwards to get rid of the clip-paths is quite fast OTOH) .
After splitting the content onto different layers, the lines on the layer 'grid' have been created with the pencil tool, snapping to path intersections (without hangs) - with the layers of the red/green/blue data points hidden, to avoid unnecessary snap candidates ;)