coverages update

Hi all,

just to share some recent developments and thoughts wrt the coverages section
with you:

At the OGC TC meeting next week, an enhanced coverage model will be presented.
It goes by the name of "Coverage Implementation Schema (CIS) 1.1" and represents
OGC's interoperable concretization of the abstract ISO 19123 model.
Developed within Testbed-11, it represents the next version of OGC's coverage
model with several features heavily requested by a variety of stakeholders:

- a unified, consolidated model for non-regular grids (effectively, a superset
of GMLCOV ReferenceableGridCoverage and GML 3.3 ReferenceableGridByXXX)

- coverages using SensorML 2 sensor models, thereby closing a harmonization gap
to SWE

- interpolation support, in particular for modelling continuous grid coverages

- coverage partitioning; among others, this enables a "time-interleaved
representation", but also general coverage tiling

- careful correction of misleading formulations, starting with the title: "GML
Application Schema" -> " Coverage Implementation Schema"

CIS 1.1 has been provided in advance to the relevant ISO TC211 convener, Doug
O'Brien, who had no objections. Hence, there is a chance that this will become
forthcoming ISO 19123-2.

So this is about CIS 1.1. Next, some thoughts while checking the UCR document again:
- "2.5 Coverage in Linked Data": Issue 27 is not yet addressed (hence, this item
not part of the "accepted requirements" in Section 5)
-  "5.4 Coverage temporal extent: It should be possible to add temporal
references to spatial coverage data." Does this mean:
- "5.14 Georectification: The coverage data model should consider the inclusion
of metadata to allow georectification to an arbitrary grid." Not sure about
"consider"; anyway, CIS 1.1 supporting SensorML 2.0 allows that.
- "5.26 Multiple types of coverage: It should be possible to represent many
different types of coverage. For instance, to classify coverage data by grid
complexity: GridCoverage (GML 3.2.1), RectifiedGridCoverage,
ReferenceableGridCoverage, etc." -- With CIS 1.1 this is much simplified (who in
Web World would intuitively know what a ReferenceableGridCoverage is?) while
coverage all possible grid types. As these are classified into separate classes
along their complexity, a clear decision can be made on "how far to go" with the
support for different coverage types.

cheers,
Peter








-- 
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
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Received on Friday, 11 September 2015 11:56:42 UTC