[tei-council] updated facsimile odd

[Daniel O'Donnell]

On Thu, 2007-08-09 at 10:17 +0900, Christian Wittern wrote:
> >
> > I think myself subject to clarification that we should be calling a
> > spade a spade here: everything in the ODD and its description suggests
> > to me that we are counting pixels. If we were doing anything else surely
> > we'd need some kind of translation table and discussion of how real
> > world measurements get converted to locations on the image?
> >   
> Let's assume you have a page of 297x210mm, which is covered by the 
> surface element, which gives you also a grid of 0 0 100 100 to work 
> from.  The grid is more like the one you have on maps, which simple go 
> from A, B, C, D,... and 1, 2, 3, 4, ... which allows you to say that 
> something you are interested in is in C1, without any need to worry 
> about the scale of the map.  In the same way, you could say there is a 
> spot of spilled ink at 20 20 40 40.  If and only if you want to know the 
> size of this spot, then you will need to look up the dimensions and 
> calculate the scale factor.

O.K. Conal also talks about them not "necessarily" being pixels. So do
users need to define the outer limits of the box? How do I know what the
coordinates of the far right, and bottom left and bottom right corners
of the box are so that I can identify where 21 33 75 92 is?

I'm sure you are explaining the obvious to me, but at least we are
making progress on this, I think--see Lou's comment on the paragraph for
inclusion in the guide.

> 
> > I think real world object coordinates would be brilliant to have.
> > Conservators would love them too, I bet, since they would be image
> > independent (you'd just need to add new reference coordinates to your
> > lookup table). But we are simply not talking about that or any other
> > measurement as far as I can see.
> >   
> See above, I think we can't really do without providing the possibility 
> of registering dimensions.
> 
> > The hi/lo res issue is an important one: if I have
> > surface/graphic at id="hi1"|graphic at id="lo1" then the references for the
> > bottom right corners of the box (at least) will be different in each;
> > and if we are not starting in 0,0, then botheth sets will be different.
> > Should we perhaps somehow indicate a reference image in those cases?
> > This would allow the images to be aligned, since one would be expressed
> > in terms of the other. Of course, then surtheface is starting to look
> > like app; but that's neither here nor there ;)
> >   
> Now this seems coming closer and closer to reinventing METS...
> 
> Christian
> 
> 
-- 
Daniel Paul O'Donnell, PhD
Department Chair and Associate Professor of English
Director, Digital Medievalist Project http://www.digitalmedievalist.org/
Chair, Text Encoding Initiative http://www.tei-c.org/

Department of English
University of Lethbridge
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Email: daniel.odonnell at uleth.ca
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