[GRASS-dev] A0-A10 paper size calculations

[Paul Kelly]

On Wed, 2 Jul 2008, Moritz Lennert wrote:

> On 02/07/08 09:07, Hamish wrote:
[...]
>> any requests on what sizes we should include? currently for ISO sizes we
>> only define A0-A4.
>
> I've never seen these sizes with decimals (my usual sources: [1],[2]), so I 
> actually think that they are defined rounded to mm.

>From reference [1]:

"The actual millimeter dimensions in the standard have been calculated by 
progressively rounding down any division-by-two result, as the small 
program iso-paper.c demonstrates. This guarantees that two A(n+1) pages 
together are never larger than an An page."

And the results of compiling and running iso-paper.c are:
(looks like a nice complete set of sizes to include!)

4A0 = 1682 mm x 2378 mm
2A0 = 1189 mm x 1682 mm
  A0 =  841 mm x 1189 mm
  A1 =  594 mm x  841 mm
  A2 =  420 mm x  594 mm
  A3 =  297 mm x  420 mm
  A4 =  210 mm x  297 mm
  A5 =  148 mm x  210 mm
  A6 =  105 mm x  148 mm
  A7 =   74 mm x  105 mm
  A8 =   52 mm x   74 mm
  A9 =   37 mm x   52 mm
A10 =   26 mm x   37 mm

  B0 = 1000 mm x 1414 mm
  B1 =  707 mm x 1000 mm
  B2 =  500 mm x  707 mm
  B3 =  353 mm x  500 mm
  B4 =  250 mm x  353 mm
  B5 =  176 mm x  250 mm
  B6 =  125 mm x  176 mm
  B7 =   88 mm x  125 mm
  B8 =   62 mm x   88 mm
  B9 =   44 mm x   62 mm
B10 =   31 mm x   44 mm

  C0 =  917 mm x 1297 mm
  C1 =  648 mm x  917 mm
  C2 =  458 mm x  648 mm
  C3 =  324 mm x  458 mm
  C4 =  229 mm x  324 mm
  C5 =  162 mm x  229 mm
  C6 =  114 mm x  162 mm
  C7 =   81 mm x  114 mm
  C8 =   57 mm x   81 mm
  C9 =   40 mm x   57 mm
C10 =   28 mm x   40 mm