It was probably made during an argument between a European and a Texan to demonstrate how far an average Texan must to drive to get to their nearest grocery store and why high-speed rail just won't work in the US.

Phew, easy mistake to make.

15.000.001in*15.000.001in

cry more

LaTeX

Fuckin Adobe man, putting limits on us

From the reference document:

"Implementation limits", p. 991ff:

PDF itself has one architectural limit: Because ten digits are allocated to byte off-sets, the size of a file is limited to 1010 bytes (approximately 10 gigabytes).

and

The minimum allowed page size is 3 by 3 units in default user space; the maximum is 14,400 by 14,400 units. [...] Beginning with PDF 1.6, the size of the unit may be set on a page-by-page basis; the default remains at 1/72 inch. (See implementation note 177 in Appendix H.)

That implementation note, by the way, roughly states that "the UserUnit entry of the page dictionary" is more or less a dimension multiplier, and that:

Acrobat 7.0 supports a maximum UserUnit value of 75,000, which gives a maximum page dimension of 15,000,000 inches (14,400 * 75,000 * 1 ⁄ 72).

and

The magnification factor of a view is constrained to be between approximately 8 percent and 6400 percent. These limits are not fixed; they vary with the size of the page being displayed, as well as with the size of the pages previously viewed within the file.

All in all, dealing with a page of such humongous dimensions sounds rather bothersome.

Yes, it's all vector graphics. It doesn't matter how big the scale is.

Probably small. If it just had a single circle at each corner it’s just 4 objects with really far positioning values.

You could fill it with more stuff to make it bigger, of course

How long would it take to paint a 145,000 km^2 canvas? It depends how much detail you add.