[QGIS-Developer] Keeping OTB algorithm in qgis processing

[Jürgen E. Fischer]

Hi Paolo,

On Thu, 01. Feb 2018 at 11:57:28 +0000, Paolo Cavallini wrote:
> Il 01/02/2018 11:51, Alexander Bruy ha scritto:
> > IMHO, if it is really important for them, they should find a way to contact
> > devs and support development.

> > R provider was removed from core in May 2017 and as far as I can see nobody
> > asked about it in mailing lists. So I suppose it is not important.
 
> unfortunately users are often silent. but I agree, this is a way of
> stimulating they reactions.

I guess they'll start complaining once the find that GRASS and SAGA have been
removed from the windows standalone.  Before hardly anyone will notice - just
like nobody noticed that there were more hidden providers, because their
dependencies were not installed and in turn nobody missed them, when they were
removed again.

The question is who is the driving force behind the provider plugins.  If we
want those algorithms in QGIS, we will probably have to maintain the plugins,
if we don't want them to die.

Otherwise if we don't care and just want to enable others to have QGIS
intgration, they'll have to adopt the plugins.  That might work better if there
is real interest.  But I think they usally prefer their tools to be used in
their own environment and don't care that much about whether it works in QGIS
or not.  Is there solid interest of the SAGA or GRASS team to adopt the
providers?  Otherwise I guess they'll sooner or later will die.

At the very least the packaging in OSGeo4W will have to adapted.  The easiest
way would just to remove the dependencies.  This should also kill the current
problem with the 2GB NSIS limit (GRASS depends on python2, SAGA has wxWidgets,
OTB Qt4).

The plugins would be downloaded from within QGIS and instruct the user how
install the rest of the binaries (eg. from OSGeo4W or other sites (like OTB)).

There could also be processing provider plugin packages in OSGeo4W that have
the providers and depend on available binaries there.  Although those packages
would need to be available for all or a selection of qgis packages (qgis,
qgis-rel-dev, qgis-ltr, qgis-ltr-dev and qgis-dev).


Jürgen

-- 
Jürgen E. Fischer           norBIT GmbH             Tel. +49-4931-918175-31
Dipl.-Inf. (FH)             Rheinstraße 13          Fax. +49-4931-918175-50
Software Engineer           D-26506 Norden             http://www.norbit.de
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