[Qgis-developer] GGL2 - QGIS integration

Mon Jun 18 15:13:22 PDT 2012

Hi Fernando,
I supposed you were somehow involved in those projects. Nice to meet you :)
Now I will move my questions on GGL2 ml...

giovanni

2012/6/18 Fernando González <fergonco at gmail.com>

> Hi Giovanni
>
> On Mon, Jun 18, 2012 at 4:01 PM, G. Allegri <giohappy at gmail.com> wrote:
> > What do you mean with "SEXTABTE/QGis" integration? Do you mean launching
> > GGL2 commands from inside SEXTANTE (directed to the hosted GGL2 engine),
> or
> > porting GGL2 to Python?
>
> Yes, GGL2 scripts can be packaged and, as sextante is able to use
> third party processes, it should be possible to launch them from
> sextante.
>
> We already got something with the previous implementation of GGL and
> the sextante Java version.
>
> > I see on your repo a basic Python implementation to call GGL2 through
> Popen.
> > Do you mean something like that?
>
> That's the basic integration that will allow launching GGL2 scripts
> from QGIS. We plan to create a very simple interactive console at
> first, nothing to do with sextante.
>
> >
> > Sorry for so many questions, I ask them just to understand, because
> you're
> > project is very interesting and I like to think about possible future
> > applications.
>
> Please. :)
>
> > I like very much domain languages. On this topic I also follow JEQL, from
> > Martin Davis, and OrbisGIS [2] with its GDMS and GRAP tools.
>
> There is also jiffle[1] from Michael Bedward. I've copied some
> constructions from there. I've talked time ago with both of them
> (Michael and Martin) to try to collaborate... but it's not easy.
> Although the basic idea is the same, the approaches are very
> different.
>
> About OrbisGIS/Gearscape, some facts:
>
> - GDMS started in gvSIG (called GDBMS), in a boring summer, at home,
> at my home :)
> - We improved it *a lot* during the first 1.5 years of OrbisGIS
> development.
> - I forked it afterwards: Gearscape.
> - GGL stands for Gearscape Geoprocessing Language.
> - The GIS application (gearscape) and it's scripting language is no
> longer supported and we focus on the new language version (GGL2) and
> on the integration with other GIS applications (now is QGIS turn!).
>
>
> Regards.
>
>
> [1] http://code.google.com/p/jiffle/
>
>
> >
> > giovanni
> >
> > [1] http://tsusiatsoftware.net/jeql/main.html
> > [2] http://trac.orbisgis.org/
> >
> > 2012/6/18 Fernando González <fergonco at gmail.com>
> >>
> >> Hi Víctor, thanks for the support.
> >>
> >> My idea is to give the sextante integration a try once the basic
> >> integration is done. We'll see :)
> >>
> >> On Mon, Jun 18, 2012 at 10:42 AM, Victor Olaya <volayaf at gmail.com>
> wrote:
> >> > I just want to add that both Victor and Fernando are good friends of
> >> > mine and their work is impressive. If GGL2 can be implemented in QGIS
> >> > using SEXTANTE, That will be a very valuable addition. I, of course,
> >> > will be ready to help as much as needed.
> >> >
> >> > Regards
> >> >
> >> > Victor
> >> >
> >> > 2012/6/18 Víctor González <victorzinho at gmail.com>:
> >> >> Hi all,
> >> >>
> >> >> I'm Víctor (Fernando's brother) and I also wanted to introduce
> myself.
> >> >> I
> >> >> have been working with GGL for some time and I did the GGL2-GIS
> >> >> connection
> >> >> system in the context of a GSoC last year. I have been working with
> >> >> Java and
> >> >> C but never with Python, so this is a new experience for me.
> >> >>
> >> >> Regarding your question, that is the idea. But actually the Qgis
> plugin
> >> >> will
> >> >> be the server since all the communication is started by the GGL2
> >> >> environment. This plugin can be seen as a layer server that provides
> >> >> and
> >> >> "stores" (draws) layers: it opens a socket and manages the requests.
> >> >>
> >> >> Regards,
> >> >> Víctor.
> >> >>
> >> >> 2012/6/18 G. Allegri <giohappy at gmail.com>
> >> >>
> >> >>>> Appart of the UI, a qgis plugin must be created that exchanges
> >> >>>> messages with the GGL compiler in order to show results and inform
> >> >>>> the
> >> >>>> compiler about the layers loaded in qgis, etc. This approach
> already
> >> >>>> works in gvSIG. You can see how does it looks like from the user
> >> >>>> point
> >> >>>> of view here[2] and the technical details here[3].
> >> >>>
> >> >>>
> >> >>> AFAICS, GGL will be used as a server to which the Qgis plugin will
> >> >>> talk
> >> >>> through kind of an XML-RPC protocol, is it right?
> >> >>>
> >> >>> giovanni
> >> >>>
> >> >>>>
> >> >>>>
> >> >>>> I hope I've answered your question.
> >> >>>>
> >> >>>> Regards.
> >> >>>>
> >> >>>> [1] http://www.gearscape.org/html/course/ejemploggl.htm
> >> >>>> [2]
> http://www.gearscape.org/html/ggl2/tutorials/gis_interaction.html
> >> >>>> [3] http://www.gearscape.org/html/ggl2/dev/gis_connection.html
> >> >>>>
> >> >>>>
> >> >>>>
> >> >>>> On Mon, Jun 18, 2012 at 9:20 AM, Paolo Cavallini
> >> >>>> <cavallini at faunalia.it>
> >> >>>> wrote:
> >> >>>> > Il 18/06/2012 09:14, Fernando González ha scritto:
> >> >>>> >
> >> >>>> >> I hope it's interesting for some of you and, of course, any
> >> >>>> >> comments
> >> >>>> >> of such an active and skilful community are very welcome. Mainly
> >> >>>> >> because it's our very first development in python!
> >> >>>> >
> >> >>>> > Hi Fernando,
> >> >>>> > it looks a very interesting development; thanks for this. Looking
> >> >>>> > forward to test it.
> >> >>>> > How do you plan to integrate it into QGIS?
> >> >>>> > All the best.
> >> >>>> > --
> >> >>>> > Paolo Cavallini - Faunalia
> >> >>>> > www.faunalia.eu
> >> >>>> > Full contact details at www.faunalia.eu/pc
> >> >>>> > Nuovi corsi: http://www.faunalia.it/calendario
> >> >>>> > _______________________________________________
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