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Re: Point vs Range/Area Selectors?

From: Bob Morris <morris.bob@gmail.com>
Date: Mon, 10 Dec 2012 22:45:01 -0500
Message-ID: <CADUi7O7+zzsV6d5iWpnsi8hwW9wHhtuQMxH0M9TwSfAKmS+Wow@mail.gmail.com>
To: Robert Sanderson <azaroth42@gmail.com>
Cc: public-openannotation <public-openannotation@w3.org>
Are we talking only about text-based documents here, or in general
resources that have some kind of "geography"? For example, modern
digital representation of maps support-and need- selectors that are
unions of polygons, and there are widely used standards for their
specification. See http://www.opengeospatial.org/standards/is.
JPEG2000 can encode Regions of Interest (ROIs) of arbitrary polygons
and ellipses.   In general many image serializations and their
application support complex ROIs.  I suppose there is little interest
in annotations of medical images that could not support only
rectangular selectors.

Bob Morris

On Mon, Dec 10, 2012 at 3:54 PM, Robert Sanderson <azaroth42@gmail.com> wrote:
> Dear all,
> Recently in a matrix of functionalities provided by different annotation
> systems, I saw an entry:
> * Point Based Selection
> This was distinguished as a single point in an image (eg x,y but 0 w and h)
> or a single position in a text stream (eg a selector with an offset, but 0
> length)
> Is it important in the Open Annotation model to have Point selectors, or
> should we have a recommendation in the specification to use the range/area
> selectors with 0 height/width/length?
> Thanks for your thoughts on this!
> Rob

Robert A. Morris

Emeritus Professor  of Computer Science
100 Morrissey Blvd
Boston, MA 02125-3390

IT Staff
Filtered Push Project
Harvard University Herbaria
Harvard University

email: morris.bob@gmail.com
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Received on Tuesday, 11 December 2012 03:45:29 UTC

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