Well, according to https://www.reddit.com/r/MapPorn/comments/14op0qq/maximum_pdf_document_size_supported_by_adobe/ and https://alexwlchan.net/2024/big-pdf/ that cites the Wikipedia article for PDF tells us that it’s a wopping square of 145,161 km2
Fun
The biggest PDF sheet
Well, according to https://www.reddit.com/r/MapPorn/comments/14op0qq/maximum_pdf_document_size_supported_by_adobe/ and https://alexwlchan.net/2024/big-pdf/ that cites the Wikipedia article for PDF tells us that it’s a wopping square of 145,161 km2