TOCs AS v48 May 2021.pdf is a map of the UK rail network showing every station. It is a single page with a nominal size of about 2.4 meters wide and 3.4 meters high.
In Acrobat Reader/Adobe Reader it is possible to zoom in on the map until the text is visible, then smoothly scroll around it to view different parts of the network.
Unfortunately Adobe stopped releasing Acrobat reader for Linux years ago. The last version they released does still run, but it is somewhat of a pain to get it installed on a recent Linux system and it of course hasn't had any security updates in a long time. Running under Wine is possibly a solution, but the last time I tried that I couldn't get it to work.
I have tried a number of other PDF readers, but I find that none of the ones I have tried have been usable with the aforementioned PDF. They either slow to a crawl or display a blurry image with unreadable text.
Do people have any suggestions for the best way to deal with such PDFs under Linux?