[GeoNode-devel] QueryBuilder for Download Layer functionality

Wed Jun 8 01:28:51 PDT 2016

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
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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.
>
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> GeoServer Professional Services from the experts!
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> Ing. Alessio Fabiani
> @alfa7691
> Founder/Technical Lead
>
> GeoSolutions S.A.S.
> Via di Montramito 3/A
> 55054  Massarosa (LU)
> Italy
> phone: +39 0584 962313
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> 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
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> 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
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> ---------------------------------------------------------------------
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>
> 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
>
>
>
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