[tei-council] updated facsimile odd

[Christian Wittern]

James Cummings wrote:
> Sebastian Rahtz wrote:
>> What I do NOT see is how one <l> can link to
>> coords 20,20,100,100 in the _surface_. Can it?
>> It can only relate to a particular graphic?
As I understand it you link to the surface coordinates and then go and 
see which graphic covers the area you are interested in.  That seems to 
be the whole point of this indirection.
>
> I'm not entirely sure of the relationship in coordinates between the 
> graphic and the surface.  Unless the unit of measurement is determined 
> on the surface and then all the coords are defaultly in that unit of 
> measurement (and in that case it must be a real-world physical unit, 
> i.e. not pixels).
>
>> If I have a hi-res image and a lo-res image,
>> and describe the same are within each,
>> the coords of each will be different. Correct?

My understanding is that they will be exactly the same, since the coords 
are expressed relative to the <surface>.
>
> I'm not sure. If the coords is on graphic, in units of measurement 
> referring to the surface, then they both cover the same distance.  
> (One simply does it with greater resolution in its reproduction of 
> that surface.) If coords is on a zone, then it makes sense that it is 
> in relation to whatever unit of measurement is use for the graphic 
> (presumably pixels).
>
>> When I have one <surface>, with three <graphic>,
>> each with a <zone> pointing at the original of my <l>,
>> then the <l> points at all three?
>
> I think then the l/@corresp (or specialised attribute) could point to 
> all three zones, and that these zones would have different coords in 
> relationship to the graphic which contains them.  
As I understand it, the pointing goes through the indirection of the 
surface: You express the location of <l> in terms of the <surface> 
coords, using the same reference system as is used for the zones.  You 
will then discover from these coords in which of the zones (in this case 
all three) your <l> is located.


Christian

-- 

 Christian Wittern 
 Institute for Research in Humanities, Kyoto University
 47 Higashiogura-cho, Kitashirakawa, Sakyo-ku, Kyoto 606-8265, JAPAN