Hi Stéphane,
Thanks for your ideas. It is my personal goal (and the goal of the Swiss
QGIS user group) to make Geopackage the number 1 file-based format in
QGIS and put Shapefiles in the graveyard.
Therefore we paid Even Rouault in the past for some geopackage
improvements. Swiss provinces also invested into a tool name ili2gpkg -
a tool that can read official swiss data models in Interlis format and
generate the data structure in a geopackage - incl. import of data, if
it already exists. This is in parallel with a similar tool called ili2pg
that does the same for Postgis.
As you discovered there are more issues around Geopackages to make them
as hassle-free as possible. I also think the raster part of geopackages
did not get too much attention so far.
Since you have been so successful with your campaign around improving
discrete/paletted rasters - may I suggest the same for Geopackage
improvements? You can start a list of useful improvements in a Google
Docs document or on Github as a QEP. Other people can contribute and we
can find a way to fund the improvements. Both QGIS-CH and QGIS.ORG could
help with the financing aspect.
Some feedback to your 3 issues:
ad 1): you are right - it is not possible to easily create an empty
geopackage. One always starts with a vector layer.
ad 2): this should be fixed in QGIS master (QGIS 3). Just tested, works
fine
ad 3): yes, would be useful
I am sure there are more issues. Would be useful to collect them for
further improvements.
Do you want to start a document? I would be glad to assist you.
Let's also think about rasters. E.g. saving to a Geopackage should be as
easy as saving to a TIFF-file. Also in Processing. But I have to admit I
haven't really tested the raster part of Geopackage a lot. Maybe some
things are already possible.
Greetings,
Andreas
On 2017-09-28 06:47, Stéphane Henriod wrote:
> Dear all
>
> I am making a few tests with Geopackages and I have a short list of behaviors
> or features that, IMO, would be quite nice to have in Qgis. But I'd like to
> have feedback from some of you before moving ahead. Maybe the majority
> disagrees with my opinion or maybe I have overlooked some already existing
> features :-)
>
> [currently testing on 2.18.11]
>
> 1) Creating a Geopackage DB
>
> As far as I see, the only way to create a Geopackage DB in Qgis is to create
> a new Geopackage layer. But there are cases where I don't want to create a
> new layer. I only want to create an empty Geopackage, so that I can later,
> e.g. import a bunch of shapefiles into it.
>
> Of course, I can create a geopackage layer and delete it later, but this is
> not super intuitive for the users
>
> 2) Qgis browser
>
> It would also be very handy to be able to browse the content of a Geopackage
> within the Qgis browser, so that we can drag-and-drop layers directly to the
> project
>
> 3) Multi-export to Geopackage
>
> If I want to migrate a whole project from Shapefiles and Tiff files to a
> single Geopackage DB, I would like to multi-select them and drag-and-drop
> them into an existing Geopackage DB (or a _Save all layers as..._ in the
> contextual menu, when I select more than 1 layer)
>
> Just curious if those needs / ideas resonate and / or if there are already
> plans in these directions
>
> Thanks and cheers
> Stéphane
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