Pat,
I think the site you may be thinking of is www.vischeck.com. It
allows users to simulate 3 types of colourblindness on their own images /
web sites for assessing accessibility, very useful indeed.
Regards,
Kieron
>From: Pat Reynolds <[log in to unmask]>
>Reply-To: "The Forum for Information Standards in Heritage (FISH)"
> <[log in to unmask]>
>To: [log in to unmask]
>Subject: Re: [FISH] Colour coding of building fabric dates
>Date: Thu, 5 Feb 2004 19:37:02 +0000
>
>I don't think that an 'agreed coding could work if colours were fixed at
>absolute dates (e.g. 16th century = orange), but a relative scale (red
>for earliest through to violet for latest, for example) might work.
>
>The actual colours to use are also important to meet accessibility
>standards: colours should be selected which are perceived as distinct to
>people with colour blindness, and no colour perception (see the RNIB
>'see it right' guidelines for further information - there's also an
>interesting website, whose url temporarily escapes me, that shows
>pictures and diagrams as might be seen by people with various types of
>colour blindness - it also advertises software which will take your
>diagram and change its colours so they become distinct. The tone to be
>used will be partially determined by context: the bright sunlight (????)
>occasionally experienced in a site interpretation plaque at 1m from the
>viewer calls for different tones than a paper plan, and a computer
>screen is so dependent on users that specification is meaningless!
>
>The history of a building will also, perhaps, determine which colour
>represents which date. Based on the principles of good cartography, you
>may not wish to place colours similar in hue and tone close together -
>and in one building 11th and 12th century may be close together and 13th
>distinct, while in another 11th and 13th my be close together, but 12th
>distinct (bother those people in the past, why couldn't they build nice
>logical buildings!)
>
>With best wishes,
>
>Pat
>
>In message <002601c3eb49$77490540$f071e150@johnwin2k>, john winstone
><[log in to unmask]> writes
> > Is there yet an agreed colour coding for the dates of building
> > fabric when preparing historic building surveys?
> >
> > I suppose this could simply be a series of colours for periods 1
> > and onwards. Alternatively, by centuries, or simply a sequence of
> > colours that the building historian could apply to the dated
> > sequence in hand. I could of course invent one, but it seems to me
> > it would be a great help in reading drawings for there to be an
> > agreed sequence for all to use and so recognise.
> >
> > This is not of course as straightforward as it sounds. Simple
> > enough with plan and section projections, but as far as surfaces
> > are concerned - floors or walls for instance where fabric dates may
> > vary from the enclosing walls - I think they need to be light tints
> > of the period in question. Otherwise a rendering easily becomes
> > garish.
> >
> > Can anyone tell me where I could find such an agreed code, if I've
> > missed it please.
> >
> > John Winstone RIBA IHBC
>
>--
>Pat Reynolds
>[log in to unmask]
> "It might look a bit messy now,
> but just you come back in 500 years time"
> (T. Pratchett)
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