This is something we've faced in our markup project, Mariage.UVic.Ca,
and which I've been thinking about a lot for the Image Markup Tool
(which also only handles rectangles). However, it may not be as much of
a problem as you think. It turns out that a rectangle that outlines the
polygon you want to focus on is perfectly acceptable for most purposes
(identifying the zone for the reader, distinguishing the zone from other
zones, and so on). It's also the case that most of our projects end up
being rendered for Web browsers at some point, and most reliable methods
of outlining areas on a Web browser depend (for the moment) on HTML
block-level elements which are also rectangular. So in most projects, it
turns out not to be such a big issue to stick to rectangles.
However, for one project where we absolutely did require polygons (a
map-based project, where we had to outline roads, buildings etc.), we
used Inkscape to generate SVG files with polygon shapes. You can then
embed the SVG into a TEI file. Roma allows you to generate a schema that
will allow SVG 1.1 content inside a TEI document. Inkscape is
open-source and multi-platform, and I'd heartily recommend it.
Le Rolle Vanessa wrote:
> Dear list,
> In my training, I’m operating on the project of a critical edition
> electronic of the notebooks of Flaubert's “Bouvard et Pécuchet”.
> We are planning to use TEI. We’re now thinking about a method to develop a
> close correspondence between text and image, and to cut the sheet in several
> The problem is that the corpus is a modern manuscript and so areas or zones
> are very irregulars.
> We found that TEI only allows rectangles (“att.coordinated”) and we need for
> the project to make polygons.
> I would be thankful for any information about this case, and if other
> digitalization projects have met this problem, how are they dealing with?
> Yours faithfully,
> Vanessa Le Rolle
> Institut des Sciences de l'Homme - CNRS UMS 1798
> Service d'Ingénierie Documentaire
University of Victoria Humanities Computing and Media Centre
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Half-Baked Software, Inc.
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