[GeoNode-devel] QueryBuilder for Download Layer functionality

Thu Jun 9 00:35:20 PDT 2016

Hello guys,

Thanks a lot for your feedback.

Dimitris

On Wed, Jun 8, 2016 at 7:39 PM, Paolo Corti <pcorti at gmail.com> wrote:

> Hey Simone and Alessio
>
> thanks for the feedback.
>
> Sure, having an asynchronous process to generate datasets for download
> user requests is something we have been talking since a while.
> In my opinion this process shouldn't be tied to GeoServer, but should
> be Pythonic, in the form of tasks in Celery for example. And of
> course, using ogr2ogr and gdal_translate
>
> This way code will work even when once it will be possible to use
> GeoNode with different map servers (for example with the QGIS Server
> one).
>
> Obviously if you guys have something already working as a GeoServer
> WPS, it would be very welcome in the meanwhile!
>
> thanks again
> p
>
> On Wed, Jun 8, 2016 at 4:28 AM, Simone Giannecchini
> <simone.giannecchini at geo-solutions.it> wrote:
> > Ciao Paolo,
> > there is nothing "wrong" in your approach, it is more than
> > reasonable., but I second what Alessio is saying.
> >
> > We used that approach in the past then we moved away for various reasons:
> >
> > -1- synch requests with WFS tends to perform badly when the work to do
> > is non trivial (large extraction, reprojections, etc...)
> > -2- you need to use WFS for vector and WCS for raster
> >
> > I would recommend having a quick look at this page:
> >
> http://docs.geoserver.org/stable/en/user/community/wps-download/index.html
> >
> > In addition you can also chain the WPS ogr and gdal output to get more
> > output formats.
> >
> > You can try a live instance here:
> > http://sit.comune.bolzano.it/mapstore/?config=download
> >
> > (easy, low-end infrastructure :) )
> >
> >
> >
> > Regards,
> > Simone Giannecchini
> > ==
> > GeoServer Professional Services from the experts!
> > Visit http://goo.gl/it488V for more information.
> > ==
> > Ing. Simone Giannecchini
> > @simogeo
> > Founder/Director
> >
> > GeoSolutions S.A.S.
> > Via di Montramito 3/A
> > 55054  Massarosa (LU)
> > Italy
> > phone: +39 0584 962313
> > fax:     +39 0584 1660272
> > mob:   +39 333 8128928
> >
> > http://www.geo-solutions.it
> > http://twitter.com/geosolutions_it
> >
> > -------------------------------------------------------
> > AVVERTENZE AI SENSI DEL D.Lgs. 196/2003
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> > 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
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> > intended recipient, please contact immediately the sender by
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> >
> >
> > On Wed, Jun 8, 2016 at 10:20 AM, Alessio Fabiani
> > <alessio.fabiani at geo-solutions.it> wrote:
> >> Well, first of all it does not allow to filter raster layers, secondly
> the
> >> filter could be potentially too big and finally it allow you just to
> filter
> >> out subsets of data.
> >>
> >> Everything works fine until you have small datasets and you don need to
> crop
> >> and reproject the outcomes.
> >>
> >> Finally, as far as I understood, everything is done synchronously. In
> other
> >> words you lock the server until the request has finished. Again, it
> works
> >> well until you have elatively small vectorial datasets.
> >>
> >> Best Regards,
> >> Alessio Fabiani.
> >>
> >> ==
> >> GeoServer Professional Services from the experts!
> >> Visit http://goo.gl/it488V for more information.
> >> ==
> >>
> >> Ing. Alessio Fabiani
> >> @alfa7691
> >> Founder/Technical Lead
> >>
> >> GeoSolutions S.A.S.
> >> Via di Montramito 3/A
> >> 55054  Massarosa (LU)
> >> Italy
> >> phone: +39 0584 962313
> >> fax:     +39 0584 1660272
> >> mob:   +39 331 6233686
> >>
> >> 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.
> >>
> >> ---------------------------------------------------------------------
> >>
> >>
> >> On Tue, Jun 7, 2016 at 8:53 PM, Paolo Corti <pcorti at gmail.com> wrote:
> >>>
> >>> Hello Alessio
> >>>
> >>> On Fri, Jun 3, 2016 at 9:11 AM, Alessio Fabiani
> >>> <alessio.fabiani at geo-solutions.it> wrote:
> >>> >
> >>> > Maybe you want to consider the use of such plugin to extend the
> >>> > capabilities
> >>> > of your query plugin instead of relying only on CQL filters (if I
> >>> > understood
> >>> > correctly how the tool currently works).
> >>> >
> >>>
> >>> Would love to learn what is wrong in relying on CQL filters
> >>> thanks a lot
> >>> p
> >>>
> >>> --
> >>> Paolo Corti
> >>> Geospatial software developer
> >>> web: http://www.paolocorti.net
> >>> twitter: @capooti
> >>> skype: capooti
> >>
> >>
> >>
> >> _______________________________________________
> >> geonode-devel mailing list
> >> geonode-devel at lists.osgeo.org
> >> http://lists.osgeo.org/mailman/listinfo/geonode-devel
> >>
>
>
>
> --
> Paolo Corti
> Geospatial software developer
> web: http://www.paolocorti.net
> twitter: @capooti
> skype: capooti
>
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