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3

The only thing that would change the size of the PNG by that magnitude, assuming your DPI has always been 220, and the vectors are generally similar, would be the page size being larger. 1-4MB is typical for an 8.5"x11" paper, but something larger like 14" x 22" could conceivably generate a PNG around 20MB. If the page size is the same, then I'd try out the ...


2

Your best bet is to use InkScape and convert your graphics to SVG. Polygons can be filled with rasters, but points and markers need SVG. If your symbol is available in a font, you can also use Font markers. It's fairly straightforward:- Load bitmap (png, jpg etc) into Inkscape with File > Open File > Save as (use Plain SVG rather than default Inkscape ...



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