[Qgis-developer] New feature's needed, create geometry from attribute

[Gino Pirelli]

thanks to Regione Toscana you can find rt_qspider ported to qgis 2.0

if you find it useful, please test it and refer problems as usual in:
http://hub.qgis.org/projects/rtqspider

plugin home is: http://plugins.qgis.org/plugins/rt_qspider/

thanks, Luigi Pirelli (luigi.pirelli at faunalia.it)


On 2 July 2013 09:12, Andrea Peri <aperi2007 at gmail.com> wrote:

>  Perhaps you could be interested in our plugin:
> RT QSpider.
>
> It create a shapefile from a dbf with coordinate on two field int or
> textual.
>
> The plugin is actually for 1.8 only, bt we plan early to evolve to qgis 2.0
>
> Regards,
>
>
> On 01/07/2013 09:48, HAUBOURG wrote:
>
>  Hi all, let me precise the need:****
>
> Numerical vertex edit and wkt plugin are usefull when dealing with one
> geometry. ****
>
> Geom calculation with field update can create eventually a WKB, but it’s
> absolutely not user friendly, and there is actually no way to load a layer
> from that in a file based layer. ****
>
> ** **
>
> Think of a user getting a excel or calc spreadsheet with XY inside. The
> only way to import it directly as a spatial layer (not talking about using
> sqlite or postgis.. too complex for common users not even aware of data
> source types) is too export it to csv and import it with delimited text
> plugin. ****
>
> That is always a pain since no tool exports csv in the same way when
> dealing with numerical / text types, decimal separators… ****
>
> XLS, calc, dbf do type correctly fields and avoid any file conversion (if
> no formula or problem in field names today). Importing directly the
> datasource, and being able to spatialize it afterwards , only if needed
> (join pure attribute data is also a use case), would be nice. ****
>
> ** **
>
> So is the need for my corp.****
>
> My question : I would like to avoid data duplication (again) , is that
> feasible using pluginlayerType in python API todayu, or do I need some core
> modifications ? Of course, that need to be reloaded correctly with a
> project file. ****
>
> ** **
>
> Régis****
>
> ** **
>
> ** **
>
> ** **
>
>  ****
>
> Cordialement,****
>
> Régis Haubourg****
>
> ----------------------------------------------------------------------
> --------------
> Régis Haubourg
>
> Administrateur de données Géographiques
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>
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> ****
>
> * *
>
> Accédez aux données sur l'eau  :****
>
> http://adour-garonne.eaufrance.fr/ ****
>
> ** **
>
> *De :* kimaidou [mailto:kimaidou at gmail.com <kimaidou at gmail.com>]
> *Envoyé :* dimanche 30 juin 2013 22:00
> *À :* Anita Graser
> *Cc :* Alexander Bruy; qgis-developer; HAUBOURG
> *Objet :* Re: [Qgis-developer] New feature's needed, create geometry from
> attribute****
>
> ** **
>
> Hi****
>
> What about using the field calculator ? I think I have seen a method in
> the "geometry" tools : something like geomfromwkt ? If needed, we could
> simply add a way to modifiy the features geometry with the field
> calculator, and it will do the trick. ****
>
> ** **
>
> ** **
>
> 2013/6/30 Anita Graser <anitagraser at gmx.at>****
>
> The Quick WKT plugin does something very similar.****
>
> Anita****
>
> ** **
>
> On Sun, Jun 30, 2013 at 3:06 PM, Alexander Bruy <alexander.bruy at gmail.com>
> wrote:****
>
> Hi, what about NumericalVertexEdit plugin? If I understand correctly, it
> do what you need.
>
> 2013/6/30 Régis Haubourg <regis.haubourg at eau-adour-garonne.fr>:****
>
> > Hi all,
> > After some training courses here, a very common use case is not satisfied
> > easily:
> >
> > The only entry to create geometry from text (XY or WKT) is the delimited
> > text plugin.
> > It appears that having a separate fonction "create point" like in
> Mapinfo or
> > Arcgis would be really handy, and could avoid the need of csv import.
> >
> > I was thinking of making a plugin for this, but I'm wondering what is the
> > best approach.
> >  1- duplicate layer into a memory layer. Easy, requires MemoryLayerSaver
> to
> > make data persistent, is not dynamic with datasource.
> >  2- create a pluginLayer? I'm not sure it will do what I need. I would
> like
> > the project to keep a reference to the datasource (xls, whatever ogr/
> > postgres/ sqlite/ spatialite) and replace or create geometry on load by
> > reading XY columns or WKT column.
> >
> > Is that feasable in a plugin,  as a proof of concept, or does it require
> > core classes modifications (C++ work , so I won't do it by myself)
> >
> > Thanks for your tips,
> > Régis
>
> --****
>
> Alexander Bruy****
>
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