Quite a coincidence, I've also been wrestling with axis order last week, and
also found that the documentation did not appear to be correct! The way I
expect it to work is for gt-epsg-wkt to be a drop in replacement for
gt-epsg-hsql, so no difference in axis order, I think it's confusing enough as
it is. The original reason I personally started to use the wkt version is a
dependency conflict with hsqldb, I also continued to use it because if I use
Geotools for instance on Hadoop, it sometimes creates a lot of short living
processes, and I don't want it to do this database setup. Also note that I
generally only use a couple of predefined reference systems, so there's no need
to have the full DB.
I would also suggest that we at least try to keep the axis order consistent if
you use the long form, as that is what most people in the OGC community are
doing. If a major implementation like geotools/geoserver starts to deviate from
this in certain implementations, than we're back to where we started in the
whole axis order mess.
best regards,
Jeroen
Jeroen Dries
TAP - Centre for Remote Sensing and Earth Observation Processes
VITO NV | Boeretang 200 | 2400 Mol
tel. +32 14 33 55 11 | jeroen.dr...@vito.be<mailto:voornaam.n...@vito.be>
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________________________________
Van: andrea.a...@gmail.com [andrea.a...@gmail.com] namens Andrea Aime
[andrea.a...@geo-solutions.it]
Verzonden: vrijdag 27 februari 2015 12:55
Aan: Niels Charlier; Dries Jeroen
CC: Ben Caradoc-Davies; geotools-devel@lists.sourceforge.net; Jody Garnett
Onderwerp: Re: [Geotools-devel] axis order blues
On Fri, Feb 27, 2015 at 12:34 PM, Niels Charlier
<ni...@scitus.be<mailto:ni...@scitus.be>> wrote:
On 27-02-15 11:52, Andrea Aime wrote:
On Fri, Feb 27, 2015 at 11:34 AM, Niels Charlier
<ni...@scitus.be<mailto:ni...@scitus.be>> wrote:
Hmm yeah I figured it had something to do with that. Thanks for the
detailed explanation, Ben.
But my question remains: should gt-epsg-wkt be allowed to produce the
wrong CRS in the first place?
As far as I remember gt-espg-wkt always had east/north orientation in all CRS,
and people keep on using it like this.
I'm afraid changing the axis order now would break all existing users of
this module (e.g., I know of GeoServer customizations that use it instead of
epsg-hsql because they don't want databases to be created around, and
they don't give a damn about OGC/EPSG axis order, they actually want everything
east/north)
Isn't it unlikely that those users use the URI syntax. The geotools
documentation claims that when you use the URI syntax the result is always
perfectly predictable... quod non.
As said, there are customized GeoServer versions using it, so the use of URI
syntax is highly likely.
Jeroen, I believe you're doing that right? Using epsg-wkt in GeoServer instead
of gt-espg-hsql?
Can you talk about how you're using it, context and so on, also related to axis
flipping?
Cheers
Andrea
--
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