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Re: Point vs Range/Area Selectors?

From: Stian Soiland-Reyes <soiland-reyes@cs.manchester.ac.uk>
Date: Tue, 11 Dec 2012 11:20:52 +0000
Message-ID: <CAPRnXtmO-G1BPEcgkre4b5Yx4ikYn82P-UWQJhUFkk01zKaUUg@mail.gmail.com>
To: Robert Sanderson <azaroth42@gmail.com>
Cc: Bob Morris <morris.bob@gmail.com>, public-openannotation <public-openannotation@w3.org>
Just a note -  Point-based selectors are often shown using arrows,
which might need a certain extent, width and angle. I guess in theory
a specific styling could specify this arrow style, it should not be
part of the selector (which should not be an SVG of the arrow - just
the highlighted point).

On Tue, Dec 11, 2012 at 4:00 AM, 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.
>
> 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.
>
>



-- 
Stian Soiland-Reyes, myGrid team
School of Computer Science
The University of Manchester
Received on Tuesday, 11 December 2012 11:21:47 GMT

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