W3C home > Mailing lists > Public > www-style@w3.org > February 2002

CSS3 Media Queries WD -- Metric units for resolution

From: Simon Kissane <sj_kissane@yahoo.com>
Date: Sun, 17 Feb 2002 23:26:59 -0800 (PST)
Message-ID: <20020218072659.75623.qmail@web20403.mail.yahoo.com>
To: www-style@w3.org

The current CSS3 Media Queries working draft only
defines dpi (dots per an inch) as a resolution unit. I
strongly suggest that you also provide a metric unit
for resolution, such as dots per a centimetre (dpcm)
or dots per a milimetre (dpmm).
1 inch = 25.4 mm, so 1 dpi = 1/25.4 dpmm, or about
.0394 dpmm. So 300 dpi would be 12dpmm or 120dpcm.
Metric (or to be more exact SI units) are the
internationally preferred system of units, and are
also the preferred system in most countries in the
world (bar the obvious exceptions like the US). Many
people out there (including me) primarily use metric
units in their daily lives, and find thinking in
inches and other Imperial/customary units
You have already done a very good job in supporting
metric units like milimetres in CSS for things like
font sizes (most software out there only lets you
use points). I hope you'd continue doing this by
providing a metric alternative to dpi.
Of course, I'm not suggesting dpmm or dpcm as a
replacement for dpi. Both should be in CSS3, so that
people who want to use dpi can use dpi, but people
who want a metric alternative will have one.
Simon J Kissane

[I'm posting this to the list again because last time
I sent it I wasn't a subscriber to it and so I suspect
it wasn't recieved. If it was, apologies for posting
it twice.]

Do You Yahoo!?
Yahoo! Sports - Coverage of the 2002 Olympic Games
Received on Monday, 18 February 2002 02:27:00 UTC

This archive was generated by hypermail 2.3.1 : Monday, 2 May 2016 14:27:00 UTC