On Tue, Aug 1, 2017 at 8:09 PM, Gavin Medley <med...@unavco.org> wrote:
> Hi,
>
> I'm using 1.1.0. Shouldn't the axis order be defined by the EPSG official
> WKT string? Am I correct in thinking that order[1] and order[2] specify the
> coordinate order?
>
OGC took its dear time to make things clear on this, WFS 1.1 happened
midway when the axis order storm blew up (and I'm
partially to blame cause I raised exactly your question, shouldn't WGS84 be
in lat/lon order?).
When that happened everybody on the user side quietly assumed a "sane"
"east/north" order for everything, in GeoServer we tried to
keep both parties happy by adopting the following policy
http://docs.geoserver.org/latest/en/user/services/wfs/basics.html#axis-ordering
Basically, legacy naming, east/north, new naming, EPSG database suggested
order instead.
Deegree seems to have followed suit,
https://github.com/deegree/deegree3/wiki/Axis-order-handling
There is currently no way to get EPSG suggested axis order with the old
EPSG:XYWZ syntax, nor any plan to add one
(but with funding or contribution, that might still happen, as a
configuration flag for those that want to impose strict behavior).
Mind, the axis order issue is far from being solved, even today and with
the latest OGC specs:
- Some outputs only work and make sense in east/north order, and the
spec allows no official way to get them (e.g, shapefile, but also, geojson
and, hear hear, geopackage, and by spec too, see
https://github.com/opengeospatial/geopackage/issues/54)
- I'm constantly asked by customers how the heck one can get east/north
data out of the latest specs (thankfully we have a way)
- Large installations on big companies guide their users to force a
lon/lat order, see for example
https://dgcsportal.readme.io/docs/web-feature-service
- Some epic blog posts raised the issue among disgruntled people:
http://dmorissette.blogspot.it/2012/12/dont-upgrade-to-wms-130-unless-you.html
Long story short, in these conditions, it's best not to take sides and
allow both desired behaviors (in the two different camps) to happen.
If you're in the "pure OGC" camp feel free to contribute an extra
configuration flag to get your GeoServer installation to force EPSG order
no matter what the syntax is, it will be welcomed (by some, at least :-p ).
See a guide to get new features in here:
https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer
Hopefully one day OGC will wake up and realize that depending on the
context and background both axis orders make sense/are needed, and will
create a syntax allowing to advertise the order without assuming a local,
or network accessible copy of the EPSG database, and an official way to ask
the data in the preferred order.
Hope this helps
Regards,
Andrea Aime
==
GeoServer Professional Services from the experts! Visit http://goo.gl/it488V
for more information.
==
Ing. Andrea Aime
@geowolf
Technical Lead
GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549
http://www.geo-solutions.it
http://twitter.com/geosolutions_it
AVVERTENZE AI SENSI DEL D.Lgs. 196/2003
Le informazioni contenute in questo messaggio di posta elettronica e/o
nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il
loro utilizzo è consentito esclusivamente al destinatario del messaggio,
per le finalità indicate nel messaggio stesso. Qualora riceviate questo
messaggio senza esserne il destinatario, Vi preghiamo cortesemente di
darcene notizia via e-mail e di procedere alla distruzione del messaggio
stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso,
divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od
utilizzarlo per finalità diverse, costituisce comportamento contrario ai
principi dettati dal D.Lgs. 196/2003.
The information in this message and/or attachments, is intended solely for
the attention and use of the named addressee(s) and may be confidential or
proprietary in nature or covered by the provisions of privacy act
(Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection
Code).Any use not in accord with its purpose, any disclosure, reproduction,
copying, distribution, or either dissemination, either whole or partial, is
strictly forbidden except previous formal approval of the named
addressee(s). If you are not the intended recipient, please contact
immediately the sender by telephone, fax or e-mail and delete the
information in this message that has been received in error. The sender
does not give any warranty or accept liability as the content, accuracy or
completeness of sent messages and accepts no responsibility for changes
made after they were sent or for other risks which arise as a result of
e-mail transmission, viruses, etc.
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Geoserver-users mailing list
Please make sure you read the following two resources before posting to this
list:
- Earning your support instead of buying it, but Ian Turton:
http://www.ianturton.com/talks/foss4g.html#/
- The GeoServer user list posting guidelines:
http://geoserver.org/comm/userlist-guidelines.html
Geoserver-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geoserver-users
