Hello everyone,
Thanks for your comments. I suggest then that I implement the behaviour
as it was suggested in the example of WFS 2.0 specs, since this is also
the least invasive for the geotools/geoserver code, and there don't
appear to be any particular objections against it. I suggest also
however, that I add a boolean parameter to the method in the CRS utility
class "allowDifferentDimension" so that the method is generic enough for
other purposes and its behaviour with regards to dimensional differences
is clear.
Is this a solution that makes sense ?
Kind Regards
Niels
On 1/10/2021 09:43, Andrea Aime wrote:
On Mon, Oct 11, 2021 at 7:05 PM Niels Charlier <ni...@scitus.be
<mailto:ni...@scitus.be>> wrote:
Hello Andrea,
I did not mean to misrepresent you. I actually thought your
suggestion made sense. The new method in the CRS class is
(currently) only intended for reprojection.
The CRS class is a generic facade to the capabilities of the
referencing subsystem, exposing some of its functionality in a simpler
way.
Its javadoc states "Simple utility class for making use of the
{@linkplain CoordinateReferenceSystem coordinate
reference system} and associated {@linkplain
org.opengis.referencing.Factory} implementations."
While most of the methods deal with reprojection, some have nothing to
do with it, like "lookupIdentifier". The class is definitely
not meant to be restricted to reprojection alone, nor has a specific
focus on WFS related activities.
As said before, it should represent the true capabilities of the
referencing subsystem, modules that need specific restrictions
should have their
As far as the standard goes, I was referring to the ""OGC® Web
Feature Service 2.0 Interface Standard – With Corrigendum"
sections: 7.9.2.4.4 srsName parameter
(https://docs.opengeospatial.org/is/09-025r2/09-025r2.html#95
<https://docs.opengeospatial.org/is/09-025r2/09-025r2.html#95>)
and 7.9.2.4.4.2 compatibly coordinate systems
And in particular this example:
"EXAMPLE: A feature with both 2D and 3D geometry properties is
requested with srsName set to a 2D CRS; the 2D property is encoded
in the requested CRS, and the 3D property is encoded with some 3D
CRS identified in the srsName of the geometry."
Oh, quite interesting!
In the meantime, I've got this two bits of response:
- Regarding OGC API - Features: "if the server implements Part 2 and a
CRS is specified then all geometries in the response must be
reprojected to the requested CRS in the response."
- Regarding WFS: " WFS is a little more flexible since you can have
multiple queries in one request each in a different CRS"
I've added the quote above in my chat with the OGC people, let's see
if it stirs up more feedback.
If you want to participate directly, get on gitter and get in this
chat: https://gitter.im/opengeospatial/WFS_FES
<https://gitter.im/opengeospatial/WFS_FES>
Cheers
Andrea
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