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.
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."
Kind Regards
Niels
On 11/10/2021 17:41, Andrea Aime wrote:
On Mon, Oct 11, 2021 at 3:21 PM Niels Charlier via GeoTools-Devel
<geotools-devel@lists.sourceforge.net
<mailto:geotools-devel@lists.sourceforge.net>> wrote:
2) allow reprojection 3D->2D and only prevent 2D->3D reprojection
(Andrea's suggestion).
Before this gets out of hand, my suggestion is limited to the CRS
class
<https://github.com/geotools/geotools/pull/3642#discussion_r721165134>.
The class is not WFS specific, and should be representing the
abilities of GeoTools
coordinate reference subsystem truthfully, rather than being bent to
the needs
of a specific WFS use case.
The WFS related issue starts appearing at upper levels... but far
sooner than WFS itself,
because the GeoTools Query API is inspired by the WFS API (has only
one target CRS)
and the basic reprojection utility classes are geared towards the same
model, e.g.,
ReprojectFeatureReader.
That said, I don't believe the standard has suggestions as to what to
do regarding
reprojection of multiple geometry fields.... but I'm asking the OGC
experts about it.
Will report back here when I have an answer.
I might have missed some bits of the discussion, sorry, trying to do
too many things today...
but I felt I was being mis-represented and had to put a stop to it
sooner rather than later.
Cheers
Andrea
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