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Re: Point vs Range/Area Selectors?

From: Bob Morris <morris.bob@gmail.com>
Date: Mon, 10 Dec 2012 23:07:40 -0500
Message-ID: <CADUi7O5pJuk3Pj7bJouEHJ-O2OLvUE83RMuG_seqpe93OHRyqw@mail.gmail.com>
To: Robert Sanderson <azaroth42@gmail.com>
Cc: public-openannotation <public-openannotation@w3.org>
On Mon, Dec 10, 2012 at 11:00 PM, Robert Sanderson <azaroth42@gmail.com> wrote:
>
> Any sort of document that has geography, either linear or area.  Which, as
> far as I can tell, is any sort of document :)
> I think that the SvgSelector or multiple SvgSelectors will handle arbitrary
> polygons, polylines and so forth.

Yeah, maybe. I suppose that the issues, if there are any, about
defining polygons on raster images using vector representations, are
not of concern to OA, but rather of the knowledge domain represented
in the Target and Body....
>
> It seems that the consensus, at least to date, is that point based selectors
> are important, and that we don't need to do anything special for them other
> than describe how they are modeled using range/area selectors.
>
> R
>
>
>
> On Mon, Dec 10, 2012 at 8:45 PM, Bob Morris <morris.bob@gmail.com> wrote:
>>
>> 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
>> UMASS-Boston
>> 100 Morrissey Blvd
>> Boston, MA 02125-3390
>>
>> IT Staff
>> Filtered Push Project
>> Harvard University Herbaria
>> Harvard University
>>
>> email: morris.bob@gmail.com
>> web: http://efg.cs.umb.edu/
>> web: http://etaxonomy.org/mw/FilteredPush
>> http://www.cs.umb.edu/~ram
>> ===
>> The content of this communication is made entirely on my
>> own behalf and in no way should be deemed to express
>> official positions of The University of Massachusetts at Boston or
>> Harvard University.
>
>



-- 
Robert A. Morris

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

IT Staff
Filtered Push Project
Harvard University Herbaria
Harvard University

email: morris.bob@gmail.com
web: http://efg.cs.umb.edu/
web: http://etaxonomy.org/mw/FilteredPush
http://www.cs.umb.edu/~ram
===
The content of this communication is made entirely on my
own behalf and in no way should be deemed to express
official positions of The University of Massachusetts at Boston or
Harvard University.
Received on Tuesday, 11 December 2012 04:08:10 GMT

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