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:[email protected]] > Gesendet am: Mittwoch, 8. Dezember 2010 09:30 > An: Milo van der Linden > Cc: [email protected] > 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 <[email protected]>: > >> > http://woostuff.wordpress.com/2010/12/06/mapinfo-and-qgis-an-overview/ > >> > >> > >> _______________________________________________ > >> Qgis-developer mailing list > >> [email protected] > >> http://lists.osgeo.org/mailman/listinfo/qgis-developer > >> > > _______________________________________________ > > Qgis-developer mailing list > > [email protected] > > http://lists.osgeo.org/mailman/listinfo/qgis-developer > > > > > -- > Andreas Neumann > http://www.carto.net/neumann/ > http://www.svgopen.org/ > > _______________________________________________ > Qgis-developer mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-developer >
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