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## Re: Understanding the eps bounding box (rounding)

 From: Andrew Bernard Subject: Re: Understanding the eps bounding box (rounding) Date: Fri, 2 Mar 2018 19:16:59 +1100

Hi Urs,

Forgive me if saying something you know, but just confirming that PostScript user space coordinate units are 1/72 inch. This is close to one point, but there is no universally accepted definition of one point. Some conventions use 1/72.72 inches (!), for example.

The information confirming this is on p 183 of the 3rd edition Postscript manual (same as the one Karl quotes from). [That manual is freely downloadable from Adobe.]

I don't know what 'bp' is, sorry, and I don't know what the size of a point ]\pt in LaTex is either.

I don't know if lilypond transforms Postscript user space coordinates into device space coordinates or when it does that. I thought GS would handle that late on, closer to final imaging.

Andrew

On 2 March 2018 at 18:26, Urs Liska wrote:

I think it *is* the smallest box, but truncated to integers. At least I can't imagine a box that leaves full units empty.
>From what I've seen so far I was confident that the numbers correspond to what LilyPond sees as \pt, and also in LaTeX I have treated the numbers as pt (as opposed to bp).

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