Re: The Multiple types of coverage requirement

Thanks, Peter! Are there URIs for these identifiers? If not, I think this
may be work for the group's Coverage in Linked Data deliverable. For now, I
can add them as examples for the Multiple types of coverage
<http://w3c.github.io/sdw/UseCases/SDWUseCasesAndRequirements.html#MultipleTypesOfCoverage>
 requirement.

Cheers,
Alejandro

On 1 June 2015 at 14:49, Peter Baumann <p.baumann@jacobs-university.de>
wrote:

>  Here is a classification by grid complexity, hope it helps somehow:
>
> - just array, mapping is 1:1
>     -> GridCoverage (GML 3.2.1)
> - linear mapping from n-D array to n-D grid, g = a*x+b for a,b in R^n
>     -> RectifiedGridCoverage
> - linear mapping with g = A*x+b for A in R^n*n
>     -> ReferenceableGridCoverage, byVector
> - linear mapping from n-D array (x_n) to m-D grid (g_m), m>n: g_m = A *
> x_n + b for A in R^n*m
>     ->ReferenceableGridCoverage, byArray
> - nonaffine transformations, ex: Sensor geometries
>
> (anybody disagreeing?)
>
> One could classify along dimension axes (horizontal, vertical, time, ...)
> but the above one I believe is most helpful for the purpose on hand, and it
> also very much determines implementation complexity and dataset sizes (in
> particular: byArray approx. doubles data set size).
>
> -Peter
>
>
>
>
> On 05/31/15 09:35, Kerry.Taylor@csiro.au wrote:
>
> I am quite ok with the UCR expressed as it is, but I note that our use
> cases do not actually require very many of these multiple types and I
> suggest that we should look more closely at * which* of the multiple types
> we really need as we go progress. I would like to suggest that we make a
> note of this in the UCR, attached to this requirement, to prevent  the
> "multiple" being interpreted as"all that have ever been thought of" .
>
>  note- i am prepared to back down on the request for the note, as  I
> think argued almost contradictorily in the case of "multiple" applied to
> "multilingual" in last week's meeting. Although in that language case I saw
> no harm other than realism in attacking every conceivable language, but in
> the coverage case I think there is a risk of harm in confusion if we take
>  on too many, which is worse.
>
>  Kerry
>
>
>
> On 29 May 2015, at 11:47 pm, "Peter Baumann" <
> p.baumann@jacobs-university.de> wrote:
>
>  Frans-
>
> here a slate (not comprehensive, but likely covering all considered by W3C
> currently):
> - gridded coverages:
>     - by dimension: 1-D through 4-D (climate people also consider 5-D)
>     - by grid type:
>         - regular grid (equidistant spacing ("resolution"), such as ortho
> imagery)
>         - irregular grids (grid lines have individual spacing per axis,
> such as timeseries often have)
>         - warped grids (grid points sit anywhere in space, but still
> topologically isomorphic to a grid)
>         - sensor grids (geo position of grid points determined by sensor
> model, usually some involved non-linear algorithm)
> - non-gridded coverages:
>     - point clouds
>     - (rest likely not of interest here)
>
> cheers,
> Peter
>
>
> On 05/29/15 14:36, Frans Knibbe wrote:
>
> Hello Alejandro,
>
>  I am looking at the Multiple types of coverage
> <http://w3c.github.io/sdw/UseCases/SDWUseCasesAndRequirements.html#MultipleTypesOfCoverage>
> requirement now: "It should be possible to represent many different types
> of coverage."
>
>  Does this mean some kind of standard classification of coverage types is
> required, so the coverage type can be indicated in the metadata for example?
>
>  Or does this mean that there should be standard encodings for different
> coverage types?
>
>  Greetings,
> Frans
>
>  --
>  Frans Knibbe
>  Geodan
> President Kennedylaan 1
> 1079 MB Amsterdam (NL)
>
>  T +31 (0)20 - 5711 347
> E frans.knibbe@geodan.nl
> www.geodan.nl
> disclaimer <http://www.geodan.nl/disclaimer>
>
>
> --
> Dr. Peter Baumann
>  - Professor of Computer Science, Jacobs University Bremen
>    www.faculty.jacobs-university.de/pbaumann
>    mail: p.baumann@jacobs-university.de
>    tel: +49-421-200-3178, fax: +49-421-200-493178
>  - Executive Director, rasdaman GmbH Bremen (HRB 26793)
>    www.rasdaman.com, mail: baumann@rasdaman.com
>    tel: 0800-rasdaman, fax: 0800-rasdafax, mobile: +49-173-5837882
> "Si forte in alienas manus oberraverit hec peregrina epistola incertis ventis dimissa, sed Deo commendata, precamur ut ei reddatur cui soli destinata, nec preripiat quisquam non sibi parata." (mail disclaimer, AD 1083)
>
>
>
>
> --
> Dr. Peter Baumann
>  - Professor of Computer Science, Jacobs University Bremen
>    www.faculty.jacobs-university.de/pbaumann
>    mail: p.baumann@jacobs-university.de
>    tel: +49-421-200-3178, fax: +49-421-200-493178
>  - Executive Director, rasdaman GmbH Bremen (HRB 26793)
>    www.rasdaman.com, mail: baumann@rasdaman.com
>    tel: 0800-rasdaman, fax: 0800-rasdafax, mobile: +49-173-5837882
> "Si forte in alienas manus oberraverit hec peregrina epistola incertis ventis dimissa, sed Deo commendata, precamur ut ei reddatur cui soli destinata, nec preripiat quisquam non sibi parata." (mail disclaimer, AD 1083)
>
>
>
>


-- 
Alejandro Llaves

Ontology Engineering Group (OEG)

Artificial Intelligence Department

Universidad Politécnica de Madrid

Avda. Montepríncipe s/n

Boadilla del Monte, 28660 Madrid, Spain


http://www.oeg-upm.net/index.php/phd/325-allaves


allaves@fi.upm.es