Hello Adam
Le 14/01/13 19:04, Adam Estrada a écrit :
I really wish I could have met you too, Martin. How was the first day of the
meeting? As for a release of SIS, I suppose its time! What are the chances of
rolling the new website template out too? @Andrew, you got your ears on?
@Mattmann, have you seen any movement with infra or board@?
It would have been nice to see you, but I hope there will be other
opportunities. Apart meeting Chris, Paul and Cameron, some points of
this first day of meeting are:
*
We had 13 peoples in the GeoAPI session. We presented 5 change
requests. 3 of them are minors and compatible additions, 2 of them
are major but announced since GeoAPI 3.0.0 by big orange warning
boxes in the Javadoc. Those 2 major changes are replacing all use of
the java.util.Date classes by ISO 19108 interfaces, and replacing
use of JSR-275 units by org.unitofmeasurement.unit interfaces. I
will call for an electronic vote hopefully next week.
*
The "Moving Features" working group which is starting. This is
basically about geometries having a speed in addition to locations.
One use case discussed was a tsunami, where the tsunami is obviously
a moving feature (a complicated one), but the transportation network
contains also moving features. Those two kinds of moving features
are managed by very different organizations, but interoperability is
needed in order to organize evacuation.
*
A Coordinate Reference System (CRS) working group which is
investigating how to better integrate support of time in CRS. There
is already some support, but some projects have more sophisticated
needs (especially the meteorologists). Different working groups like
Web Coverage Services (WCS) and Met-Ocean have elaborated various
strategies for extending the CRS specification for their needs. The
CRS working group would like to address those needs directly (if I'm
understanding right) in the ISO 19111 specification.
*
OGC specifications prior GML 3.2.1 (except OGC 01-004, which is now
a retired document) were unclear about whether the conversion from
pixel coordinates to geodetic coordinates shall map the pixel centre
or a pixel corner. One one hand, some product on the market map
pixel corner. Java2D and Java Advanced Imaging too map pixel corner.
On the other hand, the legacy OGC 01-004 was explicitly mandating
pixel centre. A best practice OGC document also recommend pixel
centre, but this is not formally a standard. Finally the GML 3.2.1
specification mandates pixel centre, but strictly speaking this is
not retroactive. However the recommendation is to consider that the
rule is "pixel centre" even for older GML formats.
*
A work which may become a new revision of ISO 19107 (geometry) is
under way. They were discussion about how to extend the services
provided by ISO 19111 with other operations needed for geometries,
for example calculating the distance between two points. Distance
calculation are CRS-dependent, so it could be a method in some kind
of "ReferenceSystem" object.
Martin
