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- Path: sparky!uunet!pipex!bnr.co.uk!uknet!mcsun!news.funet.fi!network.jyu.fi!tarzan!tt
- From: tt@tarzan.jyu.fi (Tapani Tarvainen)
- Newsgroups: comp.std.internat
- Subject: Re: What are the ISO paper sizes? (Was: An alternative I18N paradigm)
- Message-ID: <TT.92Dec29093924@tarzan.jyu.fi>
- Date: 29 Dec 92 07:39:24 GMT
- References: <1hkff3EINN5uv@uni-erlangen.de> <cline.725593960@ebony.cs.scarolina.edu>
- Sender: news@jyu.fi (News articles)
- Organization: University of Jyvaskyla
- Lines: 29
- In-Reply-To: cline@cs.scarolina.edu's message of 29 Dec 92 01: 52:40 GMT
- Originator: tt@tarzan.math.jyu.fi
- Nntp-Posting-Host: tarzan.math.jyu.fi
-
- In article <cline.725593960@ebony.cs.scarolina.edu> cline@cs.scarolina.edu (Ernest Cline) writes:
-
- >However, what I would like to know is what size is A4 or C5 or the rest
- >of these map references that ISO uses for paper.
- >Please reply by e-mail or posting with either the sizes or suggestion on
- >where to look for a listing of _all_ the sizes.
-
-
- All A sizes can be determined as follows:
-
- A0 is exactly one square meter in area and the ratio of its sides (or
- the sizes of any A size paper) is sqrt(2), and each A(n+1) is exactly
- half of A(n) in area (and thus cutting an A(n) in the middle results
- in two A(n+1) papers, exactly).
-
- Consequently, the longer side of A0 is the 4th root of 2 meters
- or about 1189 mm, the shorter side that divided by sqrt(2) or 841 mm,
- and A4 those divided by sqrt(2) to the 4th (=4) or 297*210 mm.
-
- I.e., the sides of An paper are 2^(0.25-n/2) and 2^(0.25-(n+1)/2) meters.
- I don't know if any rounding has been specified.
- Actually I don't even know if the above rule has been written in the
- ISO standard or whether they've just listed the sizes, but that's the
- way the sizes were derived. Anybody know better?
-
- I don't know about the C sizes, but they appear to follow a similar
- rule. Roughly, Cn is 1.075 times An on each side.
- --
- Tapani Tarvainen (tt@math.jyu.fi, tarvainen@finjyu.bitnet)
-