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<div class="Normal"><span style='font-size: 10pt; '>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.</span></div>
<br>
<div class="Normal"><span style='font-size: 10pt; '>regards</span><br><span style='font-size: 10pt; '>Stefan</span></div>
<br>
<div class="Normal"><span style='font-size: 10pt; '>> -----Ursprüngliche
Nachricht-----</span><br><span style='font-size: 10pt; '>> Von: Andreas
Neumann
[mailto:a.neumann@carto.net]</span><br><span style='font-size: 10pt; '>>
Gesendet am: Mittwoch, 8. Dezember 2010
09:30</span><br><span style='font-size: 10pt; '>> An: Milo van der
Linden</span><br><span style='font-size: 10pt; '>> Cc:
qgis-developer@lists.osgeo.org</span><br><span style='font-size: 10pt; '>>
Betreff: Re: [Qgis-developer] MapInfo and
QGIS</span><br><span style='font-size: 10pt; '>>
=?iso-8859-1?Q?=E2=80=93_An_overview_=C2=AB_Nathans_MapInfo_an</span><br><span style='font-size: 10pt; '>>
d_.Net_Blo</span><br><span style='font-size: 10pt; '>>
g?=</span><br><span style='font-size: 10pt; '>>
</span><br><span style='font-size: 10pt; '>> yes - arcs would be nice to have
in the Open Source GIS stack. I
would</span><br><span style='font-size: 10pt; '>> need them as
well.</span><br><span style='font-size: 10pt; '>>
</span><br><span style='font-size: 10pt; '>> However, it would be a lot of
work to implement it in the whole
stack:</span><br><span style='font-size: 10pt; '>> geos, proj4, ogr, QGIS,
Postgis (already supports arcs, but
</span><br><span style='font-size: 10pt; '>> not yet
for</span><br><span style='font-size: 10pt; '>> all
operators/functions)</span><br><span style='font-size: 10pt; '>>
</span><br><span style='font-size: 10pt; '>> I am still hoping it will happen
some day ...</span><br><span style='font-size: 10pt; '>>
</span><br><span style='font-size: 10pt; '>> In my opinion the support of
arcs is one of the main </span><br><span style='font-size: 10pt; '>>
differences between</span><br><span style='font-size: 10pt; '>> the more
established, commercial GIS and QGIS. All of the
</span><br><span style='font-size: 10pt; '>> survey data
in</span><br><span style='font-size: 10pt; '>> Switzerland contains arcs.
Currently, in OS GIS one has to segment
the</span><br><span style='font-size: 10pt; '>> data on import
...</span><br><span style='font-size: 10pt; '>>
</span><br><span style='font-size: 10pt; '>>
Andreas</span><br><span style='font-size: 10pt; '>>
</span><br><span style='font-size: 10pt; '>> On Tue, December 7, 2010 5:55
pm, Milo van der Linden wrote:</span><br><span style='font-size: 10pt; '>>
> Yes, nice comparison. Thanks Nathan for giving us
this!</span><br><span style='font-size: 10pt; '>>
></span><br><span style='font-size: 10pt; '>> > As a former MapInfo
consultant, I can say that there is one
</span><br><span style='font-size: 10pt; '>> more
thing</span><br><span style='font-size: 10pt; '>> > qGIS lacks, well, not
qGIS in particular but OGR: arcs. Besides
that</span><br><span style='font-size: 10pt; '>> > it is a myth that
mapinfo uses the same sql across all tables.
You</span><br><span style='font-size: 10pt; '>> > simply have to convert
every table to mapinfo's own file format
in</span><br><span style='font-size: 10pt; '>> > order to work with
it.</span><br><span style='font-size: 10pt; '>>
></span><br><span style='font-size: 10pt; '>> > Performance is a minor
issue in my opinion; if everything is
a</span><br><span style='font-size: 10pt; '>> > shapefile, qGIS is almost
as fast as MapInfo. MapInfo is
particulary</span><br><span style='font-size: 10pt; '>> > malperforming
with wms layers, wfs layers are almost
impossible.</span><br><span style='font-size: 10pt; '>>
></span><br><span style='font-size: 10pt; '>>
></span><br><span style='font-size: 10pt; '>>
></span><br><span style='font-size: 10pt; '>> > 2010/12/7 Giovanni
Manghi
<giovanni.manghi@gmail.com>:</span><br><span style='font-size: 10pt; '>>
>> </span><br><span style='font-size: 10pt; '>>
http://woostuff.wordpress.com/2010/12/06/mapinfo-and-qgis-an-overview/</span><br><span style='font-size: 10pt; '>>
>></span><br><span style='font-size: 10pt; '>>
>></span><br><span style='font-size: 10pt; '>> >>
_______________________________________________</span><br><span style='font-size: 10pt; '>>
>> Qgis-developer mailing
list</span><br><span style='font-size: 10pt; '>> >>
Qgis-developer@lists.osgeo.org</span><br><span style='font-size: 10pt; '>>
>>
http://lists.osgeo.org/mailman/listinfo/qgis-developer</span><br><span style='font-size: 10pt; '>>
>></span><br><span style='font-size: 10pt; '>> >
_______________________________________________</span><br><span style='font-size: 10pt; '>>
> Qgis-developer mailing list</span><br><span style='font-size: 10pt; '>>
>
Qgis-developer@lists.osgeo.org</span><br><span style='font-size: 10pt; '>>
>
http://lists.osgeo.org/mailman/listinfo/qgis-developer</span><br><span style='font-size: 10pt; '>>
></span><br><span style='font-size: 10pt; '>>
</span><br><span style='font-size: 10pt; '>>
</span><br><span style='font-size: 10pt; '>> --
</span><br><span style='font-size: 10pt; '>> Andreas
Neumann</span><br><span style='font-size: 10pt; '>>
http://www.carto.net/neumann/</span><br><span style='font-size: 10pt; '>>
http://www.svgopen.org/</span><br><span style='font-size: 10pt; '>>
</span><br><span style='font-size: 10pt; '>>
_______________________________________________</span><br><span style='font-size: 10pt; '>>
Qgis-developer mailing list</span><br><span style='font-size: 10pt; '>>
Qgis-developer@lists.osgeo.org</span><br><span style='font-size: 10pt; '>>
http://lists.osgeo.org/mailman/listinfo/qgis-developer</span><br><span style='font-size: 10pt; '>>
</span></div>
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