[Geoserver-devel] New vendor parameter for WMS/WCS: sortBy

GeoServer GeoServer Developer
1

Hi all,
quick mail to introduce a simple new features that I would like to implement for WMS/WCS KVP requests,
that is, sort control by the sortBy keyword.

This is meant for image mosaics, which already have a read parameter to control ordering (earliest tile top,
least cloud cover top, least snow cover on top, and so on), but do not allow the user to switch granule order at runtime.
Syntax wise it’s going to be exactly like WFS, as we already do for all other parameters borrowed from
that spec, implementation wise it’s going to replace the value provided in the configuration, just
like CQL_FILTER does today with the equivalent parameter.

Implementation should be trivial enough.

Any objection/consideration?

Cheers
Andrea

···

Regards,

Andrea Aime

==
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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

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2

I like it. Would be useful to me. Just like the filter already works, it would be nice to have this work for layers inside of a layer group as well.

···

On Mon, Jul 10, 2017 at 5:22 AM, Andrea Aime <andrea.aime@anonymised.com> wrote:

Hi all,
quick mail to introduce a simple new features that I would like to implement for WMS/WCS KVP requests,
that is, sort control by the sortBy keyword.

This is meant for image mosaics, which already have a read parameter to control ordering (earliest tile top,
least cloud cover top, least snow cover on top, and so on), but do not allow the user to switch granule order at runtime.
Syntax wise it’s going to be exactly like WFS, as we already do for all other parameters borrowed from
that spec, implementation wise it’s going to replace the value provided in the configuration, just
like CQL_FILTER does today with the equivalent parameter.

Implementation should be trivial enough.

Any objection/consideration?

Cheers
Andrea

–

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.

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Jason Newmoyer
Newmoyer Geospatial Solutions
843.606.0424
jason@anonymised.com

3

That is a great idea Andrea, nice to surface that functionality for per-request coverage access.

Jason it gets a big confusing with controlling these settings for a coverage inside a layer group, we had some discussion when per request interpolation settings were added.

···

On 10 July 2017 at 11:11, Jason Newmoyer <jason@anonymised.com> wrote:

I like it. Would be useful to me. Just like the filter already works, it would be nice to have this work for layers inside of a layer group as well.

Check out the vibrant tech community on one of the world’s most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot

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–
Jody Garnett

Jason Newmoyer
Newmoyer Geospatial Solutions
843.606.0424
jason@anonymised.com

On Mon, Jul 10, 2017 at 5:22 AM, Andrea Aime <andrea.aime@anonymised.com> wrote:

Hi all,
quick mail to introduce a simple new features that I would like to implement for WMS/WCS KVP requests,
that is, sort control by the sortBy keyword.

This is meant for image mosaics, which already have a read parameter to control ordering (earliest tile top,
least cloud cover top, least snow cover on top, and so on), but do not allow the user to switch granule order at runtime.
Syntax wise it’s going to be exactly like WFS, as we already do for all other parameters borrowed from
that spec, implementation wise it’s going to replace the value provided in the configuration, just
like CQL_FILTER does today with the equivalent parameter.

Implementation should be trivial enough.

Any objection/consideration?

Cheers
Andrea

–

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.

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4

On Mon, Jul 10, 2017 at 11:52 PM, Jody Garnett <jody.garnett@anonymised.com>
wrote:

Jason it gets a big confusing with controlling these settings for a
coverage inside a layer group, we had some discussion when per request
interpolation settings were added.

Yeah, it's going to be borderline useless, like the current filter
treatment for groups (which is what I'm going to mirror, since filter
and sorting go hand in hand): the filter specified for the group gets
cloned in all sub-layers, making it really likely that one
will throw an error about filter using an attribute that's not there.

For sorting it's going to be the same.

Cheers
Andrea

--

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
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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
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made after they were sent or for other risks which arise as a result of
e-mail transmission, viruses, etc.

5

On Mon, Jul 10, 2017 at 11:52 PM, Jody Garnett <jody.garnett@anonymised.com>
wrote:

That is a great idea Andrea, nice to surface that functionality for
per-request coverage access.

I've found a snag that I'm afraid will have to stay there.
The issue is, sortBy in WMS applies to raster and vector, and they both
have existing behavior for sorting... inconsistent with each other.

For raster data, what comes first wins, and stays on top, the other
granules pixels are not used (that's how it JAI mosaic works, and how
image mosaic "sorting" parameter has been working for years).

For vector data instead, painter's model, what comes first is painted
first, and then everything else on top. Again, pre-existing behavior
is already there as part of the painter model and the SLD vendor parameters
to control ordering.
This aligns with the general WMS behavior, it's the raster path that's
"odd", however in all dynamic sorting implementations (satellite
imagery mosaics typically) I've seen around, what comes first stays on top.

I guess we'll just have to document this clearly...

Cheers
Andrea

--

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
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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
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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
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made after they were sent or for other risks which arise as a result of
e-mail transmission, viruses, etc.

6

On Wed, Jul 12, 2017 at 2:29 PM, Andrea Aime <andrea.aime@anonymised.com>
wrote:

I guess we'll just have to document this clearly...

Pull request, including hopefully clear docs, here:
https://github.com/geoserver/geoserver/pull/2462

Made it yesterday, Daniele checked it, not sure if anyone else wants to
have a look?
I otherwise plan to merge on Monday.

This is new functionality, so no backport planned in the short term.

Cheers
Andrea

--

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

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The information in this message and/or attachments, is intended solely for
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proprietary in nature or covered by the provisions of privacy act
(Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection
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