[QGIS-Developer] Support to loading GIS projects from an extended OWC geopackage in the QGIS core

Alessandro Pasotti apasotti at gmail.com
Thu Dec 14 04:59:08 PST 2017

Hi Joana,

I think this would be a great addition to QGIS.

Big +1 from me, and thanks for the proposal.

On Thu, Dec 14, 2017 at 1:49 PM, doublebyte <joana at doublebyte.net> wrote:

> Hello,
> Maybe some of you are aware of the  "geopackage" plugin
> <https://eos.geocat.net/gitlab/joana.simoes/foss4g_
> gpkg/blob/master/foss4g_gpkg.pdf>
> .The initial goal of this plugin was to enable users to save their QGIS
> projects, including style and associated resources
>  in a extended geopackage -  the qgis geopackage extension
> <https://github.com/pka/qgpkg/blob/master/qgis_geopackage_extension.md>
>  -,
> and load it onto another QGIS installation; on this approach, the project
> is
> encoded as qgs, in a database table. Later the plugin was forked to support
> a different geopackage exension -  the owc geopackage extension
> <https://github.com/pka/qgpkg/blob/master/owc_geopackage_extension.md>
>  - ,
> which is standards-based; in this  approach
> <https://www.geocat.net/announcing-the-extended-geopackage-qgis-plugin/>
> ,
> the style is encoded as OGC:SLD and the project as OGC:OWS context. The
> goal
> of this approach is to support the migration of GIS projects, as we can
> implement this extension in any desktop or server side GIS (e.g.: ArcGIS
> Desktop).
> The fork was merged in August this year, and the latest release of the
> plugin <https://plugins.qgis.org/plugins/QgisGeopackage/>   already
> contains
> both extensions, covering both use cases of porting QGIS projects and
> migrating GIS projects. Recently, it was added  support in the core to the
> "qgis geopackage extension"
> <https://github.com/qgis/QGIS/blob/master/src/providers/ogr/
> qgsogrprovider.cpp#L762>
> , in the qgsogrprovider class. This means that if a user loads a geopackage
> which was encoded using the "qgis geopackage extension", it will
> automatically load the QGIS project from it. We think that it makes sense
> to
> also add the  "ows geopackage extension" to the core; in that case, users
> could load projects exported from other GIS software seamlessly, without
> having to load the plugin. The mechanism would be very similar to what was
> already implemented for the  "qgis geopackage extension".
> Before preparing any Pull Request, we would like to understand first what
> is
> the general feeling of the community about this feature; is this something
> which seems useful and interesting to add to the QGIS core? If yes, we
> would
> also appreciate any comments regarding any details the implementation.
> Looking forward to hearing your feedback :-)
>                                      Joana
> --
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> f4099106.html
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Alessandro Pasotti
w3:   www.itopen.it
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