When we first exported this map to a PDF file, we ended up with a 8.5 Mb file. This was a result of:
This output file size seemed large to us, especially for a letter size page. So we started experimenting by incrementally decreasing first the DPI and then the OIQ until we got to 3.1Mb PDF file with comparable visual quality. To produce the smaller sized file, we ended up using 300 DPI and OIQ = 2. The result was barely different in appearance from the first bloated file.
We did have a number of failed experiments, though. For example, we tried OIQ = 3, and while the file was 2.7Mb, the visual quality was noticeably lower, and we would have been embarrassed using this as the final export file.
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