[QGIS-Developer] Processing: questions on temporary files

[Nyall Dawson]

On Fri, 6 Dec 2019 at 16:44, Matthias Kuhn <matthias at opengis.ch> wrote:
>
> Hi
>
> On 12/6/19 12:19 AM, Nyall Dawson wrote:
> > On Thu, 5 Dec 2019 at 17:35, Alexander Bruy <alexander.bruy at gmail.com> wrote:
> >> There is a FlatGeoBuf [0], probably we can use it or at least get some ideas.
> >>
> >> [0] https://github.com/bjornharrtell/flatgeobuf
> > FlatGeoBuf indeed looks very exciting!
> >
> > But to be honest, I think an easier path would be just to directly
> > serialize the qgis features to disk -- we already have
> > QgsFeature::operator<< and >> to read and write features to data
> > streams (without loss of any information), so we could utilise those
> > during the disk read/write.
>
> Yes, FlatGeoBuf looks nice!
>
> Meanwhile, why not use a well known spatial data file format?

Because there's nothing which encompasses the full range of field type
and geometry types which the memory data provider supports...

Nyall

>
> I think rolling serialized QgsFeatures has some gotchas too, like
> writing spatial indexes, getting the file headers right and possibly
> introducing yet another file format.
>
> Obligatory XKCD https://i.redd.it/ji9zzqc919b21.png
>
> Matthias
>
> >
> > Nyall
> _______________________________________________
> QGIS-Developer mailing list
> QGIS-Developer at lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer