AW: Re: [Qgis-developer] MapInfo and QGIS – An overview « Nathans MapInfo and .Net Blog

[Ziegler Stefan]

Probably it would be feasible if we start with a postgis provider that
is able to read/write arcs since it doesn't need ogr. I would not care
about the spatial operators/functions that does not support arcs and
segmentize them for the action. But I really would like to be able to
know if there is an arc instead of just seeing a lot of vertexes.

regards
Stefan

> -----Ursprüngliche Nachricht-----
> Von: Andreas Neumann [mailto:a.neumann at carto.net]
> Gesendet am: Mittwoch, 8. Dezember 2010 09:30
> An: Milo van der Linden
> Cc: qgis-developer at lists.osgeo.org
> Betreff: Re: [Qgis-developer] MapInfo and QGIS
> =?iso-8859-1?Q?=E2=80=93_An_overview_=C2=AB_Nathans_MapInfo_an
> d_.Net_Blo
> g?=
> 
> yes - arcs would be nice to have in the Open Source GIS stack. I would
> need them as well.
> 
> However, it would be a lot of work to implement it in the whole stack:
> geos, proj4, ogr, QGIS, Postgis (already supports arcs, but 
> not yet for
> all operators/functions)
> 
> I am still hoping it will happen some day ...
> 
> In my opinion the support of arcs is one of the main 
> differences between
> the more established, commercial GIS and QGIS. All of the 
> survey data in
> Switzerland contains arcs. Currently, in OS GIS one has to segment the
> data on import ...
> 
> Andreas
> 
> On Tue, December 7, 2010 5:55 pm, Milo van der Linden wrote:
> > Yes, nice comparison. Thanks Nathan for giving us this!
> >
> > As a former MapInfo consultant, I can say that there is one 
> more thing
> > qGIS lacks, well, not qGIS in particular but OGR: arcs. Besides that
> > it is a myth that mapinfo uses the same sql across all tables. You
> > simply have to convert every table to mapinfo's own file format in
> > order to work with it.
> >
> > Performance is a minor issue in my opinion; if everything is a
> > shapefile, qGIS is almost as fast as MapInfo. MapInfo is particulary
> > malperforming with wms layers, wfs layers are almost impossible.
> >
> >
> >
> > 2010/12/7 Giovanni Manghi <giovanni.manghi at gmail.com>:
> >> 
> http://woostuff.wordpress.com/2010/12/06/mapinfo-and-qgis-an-overview/
> >>
> >>
> >> _______________________________________________
> >> Qgis-developer mailing list
> >> Qgis-developer at lists.osgeo.org
> >> http://lists.osgeo.org/mailman/listinfo/qgis-developer
> >>
> > _______________________________________________
> > Qgis-developer mailing list
> > Qgis-developer at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/qgis-developer
> >
> 
> 
> -- 
> Andreas Neumann
> http://www.carto.net/neumann/
> http://www.svgopen.org/
> 
> _______________________________________________
> Qgis-developer mailing list
> Qgis-developer at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-developer
> 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/qgis-developer/attachments/20101208/b0e5a2e7/attachment-0001.html