Re: [Qgis-user] Writing plugins::"export selected object to OGR"
Hi all, Afaik QgsVectorFileWriter is pure lecagy code. At the beginning, it was used to create new (empty) vectorlayers. But now, the method 'createEmptyDataSource' of the ogr provider does it. If there is a class in qgis core for creation of new datasets, then in my opinion it should be for all vector data providers, not only for ogr. This would require that vector data providers have a method to create empty datasets (like ogr provider has it now). There could be a new provider capability so that the qgis core knows which providers support it. Like this, it will be straightforward to implement 'save As' in a generic way, just create empty dataset and use methods addFeatures and addAttributes of QgsVectorLayer (like Martin described it). cheers, Marco Am Donnerstag, 8. Februar 2007 09:06 schrieb Martin Dobias: > I think I could do only typical estimation when people work on it in > spare time - once someone will volunteer to do it, we will have it. > Whether for 0.9 or any other version - I don't know. > > Thinking about your idea to create a plugin, in fact only thing you > need to do is to create a new (empty) shapefile (or other file type) > with appropriate fields for attributes. Then you can open that new > layer in QGIS and add all features from your data source to the new > layer using QGIS vector provider. > > Martin > > On 2/8/07, Wolfgang Qual <[EMAIL PROTECTED]> wrote: > > Hello Martin, > > I agree that it would be better to have this "OGR-export"-functionality > > inside the vector file writer class, but can you estimate when this will > > be part of QGIS? 0.9/1.0...? Maybe it would be handsome to have a plugin > > for the time in-between... > > > > Regards, > > Wolfgang > > > > Martin Dobias schrieb: > > > On 2/6/07, Oleg Gusev <[EMAIL PROTECTED]> wrote: > > >> Am Dienstag, 6. Februar 2007 13:27 schrieben Sie: > > >> > sorry, but I did not find the "export to shapefile" function in > > >> > qgis. Could you give me a hint? > > >> > > >> In ./src/core/qgsvectorfilewriter.cpp > > >> > > >> QgsVectorFileWriter::QgsVectorFileWriter > > >> ... > > >> mOutputFormat = "ESRI Shapefile"; //hard coded for now! > > >> ... > > >> QString driverName = "ESRI Shapefile"; > > >> ... > > > > > > The mentioned class in fact is not finished and I'm not sure it works > > > at all. So far QGIS lacks the functionality of a generic OGR (or > > > shapefile) output, so it might be better not to create a plugin for > > > this - improving vector file writer class to be usable would be > > > better. > > > > > > Martin > > > ___ > > > Qgis-user mailing list > > > Qgis-user@lists.qgis.org > > > http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user > > > > -- > > > > *Wolfgang Qual > > > > * *Referat für Gesundheit und Umwelt* > > Umweltschutz > > Umweltvorsorge > > RGU-UW 11 > > > > Bayerstraße 28a > > 80335 München > > > > Telefon +49 - 89 - 233 - 4 77 17 > > Telefax +49 - 89 - 233 - 4 77 05 > > > > http://www.muenchen.de/umweltatlas > > [EMAIL PROTECTED] > > Bitte beachten Sie die Hinweise zur elektronischen > > Kommunikation mit der Landeshauptstadt München: > > http://www.muenchen.de/ekomm > > ___ > Qgis-user mailing list > Qgis-user@lists.qgis.org > http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] Writing plugins::"export selected object to OGR"
I think I could do only typical estimation when people work on it in spare time - once someone will volunteer to do it, we will have it. Whether for 0.9 or any other version - I don't know. Thinking about your idea to create a plugin, in fact only thing you need to do is to create a new (empty) shapefile (or other file type) with appropriate fields for attributes. Then you can open that new layer in QGIS and add all features from your data source to the new layer using QGIS vector provider. Martin On 2/8/07, Wolfgang Qual <[EMAIL PROTECTED]> wrote: Hello Martin, I agree that it would be better to have this "OGR-export"-functionality inside the vector file writer class, but can you estimate when this will be part of QGIS? 0.9/1.0...? Maybe it would be handsome to have a plugin for the time in-between... Regards, Wolfgang Martin Dobias schrieb: > On 2/6/07, Oleg Gusev <[EMAIL PROTECTED]> wrote: >> Am Dienstag, 6. Februar 2007 13:27 schrieben Sie: >> > >> > sorry, but I did not find the "export to shapefile" function in qgis. >> > Could you give me a hint? >> > >> >> In ./src/core/qgsvectorfilewriter.cpp >> >> QgsVectorFileWriter::QgsVectorFileWriter >> ... >> mOutputFormat = "ESRI Shapefile"; //hard coded for now! >> ... >> QString driverName = "ESRI Shapefile"; >> ... >> > > The mentioned class in fact is not finished and I'm not sure it works > at all. So far QGIS lacks the functionality of a generic OGR (or > shapefile) output, so it might be better not to create a plugin for > this - improving vector file writer class to be usable would be > better. > > Martin > ___ > Qgis-user mailing list > Qgis-user@lists.qgis.org > http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user > -- *Wolfgang Qual * *Referat für Gesundheit und Umwelt* Umweltschutz Umweltvorsorge RGU-UW 11 Bayerstraße 28a 80335 München Telefon +49 - 89 - 233 - 4 77 17 Telefax +49 - 89 - 233 - 4 77 05 http://www.muenchen.de/umweltatlas [EMAIL PROTECTED] Bitte beachten Sie die Hinweise zur elektronischen Kommunikation mit der Landeshauptstadt München: http://www.muenchen.de/ekomm ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] Writing plugins::"export selected object to OGR"
Hello Martin, I agree that it would be better to have this "OGR-export"-functionality inside the vector file writer class, but can you estimate when this will be part of QGIS? 0.9/1.0...? Maybe it would be handsome to have a plugin for the time in-between... Regards, Wolfgang Martin Dobias schrieb: On 2/6/07, Oleg Gusev <[EMAIL PROTECTED]> wrote: Am Dienstag, 6. Februar 2007 13:27 schrieben Sie: > > sorry, but I did not find the "export to shapefile" function in qgis. > Could you give me a hint? > In ./src/core/qgsvectorfilewriter.cpp QgsVectorFileWriter::QgsVectorFileWriter ... mOutputFormat = "ESRI Shapefile"; //hard coded for now! ... QString driverName = "ESRI Shapefile"; ... The mentioned class in fact is not finished and I'm not sure it works at all. So far QGIS lacks the functionality of a generic OGR (or shapefile) output, so it might be better not to create a plugin for this - improving vector file writer class to be usable would be better. Martin ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user -- *Wolfgang Qual * *Referat für Gesundheit und Umwelt* Umweltschutz Umweltvorsorge RGU-UW 11 Bayerstraße 28a 80335 München Telefon +49 - 89 - 233 - 4 77 17 Telefax +49 - 89 - 233 - 4 77 05 http://www.muenchen.de/umweltatlas [EMAIL PROTECTED] Bitte beachten Sie die Hinweise zur elektronischen Kommunikation mit der Landeshauptstadt München: http://www.muenchen.de/ekomm ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] Writing plugins::"export selected object to OGR"
On 2/6/07, Oleg Gusev <[EMAIL PROTECTED]> wrote: Am Dienstag, 6. Februar 2007 13:27 schrieben Sie: > > sorry, but I did not find the "export to shapefile" function in qgis. > Could you give me a hint? > In ./src/core/qgsvectorfilewriter.cpp QgsVectorFileWriter::QgsVectorFileWriter ... mOutputFormat = "ESRI Shapefile"; //hard coded for now! ... QString driverName = "ESRI Shapefile"; ... The mentioned class in fact is not finished and I'm not sure it works at all. So far QGIS lacks the functionality of a generic OGR (or shapefile) output, so it might be better not to create a plugin for this - improving vector file writer class to be usable would be better. Martin ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] Writing plugins::"export selected object to OGR"
Am Dienstag, 6. Februar 2007 13:27 schrieben Sie: > > sorry, but I did not find the "export to shapefile" function in qgis. > Could you give me a hint? > In ./src/core/qgsvectorfilewriter.cpp QgsVectorFileWriter::QgsVectorFileWriter ... mOutputFormat = "ESRI Shapefile"; //hard coded for now! ... QString driverName = "ESRI Shapefile"; ... Oleg. ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] Writing plugins::"export selected object to OGR"
Hello Oleg, sorry, but I did not find the "export to shapefile" function in qgis. Could you give me a hint? I also use the oracle-plugin of Stephan Holl - therefore, it would be nice for me to export such features to another format (shapefile, maybe postgis). Greetings, Wolfgang Oleg Gusev schrieb: Am Dienstag, 6. Februar 2007 12:33 schrieb Wolfgang Qual: Ogr2ogr should be used for this purpose (using the sql-option). Hi Wolfgang, qgis already has an export to shapefile implementation, so export to OGR will need a replacement of the "esri shapefile" string to the appropriate format name. Oleg. ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user -- *Wolfgang Qual * *Referat für Gesundheit und Umwelt* Umweltschutz Umweltvorsorge RGU-UW 11 Bayerstraße 28a 80335 München Telefon +49 - 89 - 233 - 4 77 17 Telefax +49 - 89 - 233 - 4 77 05 http://www.muenchen.de/umweltatlas [EMAIL PROTECTED] Bitte beachten Sie die Hinweise zur elektronischen Kommunikation mit der Landeshauptstadt München: http://www.muenchen.de/ekomm ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] Writing plugins::"export selected object to OGR"
Am Dienstag, 6. Februar 2007 12:33 schrieb Wolfgang Qual: > > Ogr2ogr should be used for this purpose (using the sql-option). > Hi Wolfgang, qgis already has an export to shapefile implementation, so export to OGR will need a replacement of the "esri shapefile" string to the appropriate format name. Oleg. ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] Writing plugins::"export selected object to OGR"
Hi Paolo, ok. I am using qgis-0.8 (5975M -?) - so it would be already possible to write a plugin in python? Wolfgang Paolo Cavallini schrieb: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 I believe the new python bindings will make this far easier. pc Wolfgang Qual ha scritto: Hi list, I do not have any experience in writing plugins for QGIS, but I am just curious: would it be hard to write a plugin for QGIS, which would allow the user to export a selection of a layer (or the whole layer) into choosable ogr-format? Ogr2ogr should be used for this purpose (using the sql-option). I think, having such a plugin would be great, as QGIS offers the possibility to perform a)queries on attribute table and b) a seletion by simply click&drag with the mouse. At the moment, it is only possible to extract selected features with GRASS-data. Therefore, I first have to import the whole dataset into GRASS and do the select afterwards. What do you think? Wolfgang - -- Paolo Cavallini email+jabber: [EMAIL PROTECTED] www.faunalia.it Piazza Garibaldi 5 - 56025 Pontedera (PI), Italy Tel: (+39)348-3801953 -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFyGhB/NedwLUzIr4RAqEGAJ4oiY5OqWJ2Qh3UQ/YRfzKSL3S38wCfcj6p Laz1Uf+beDAJ53QQUweAizg= =GzbM -END PGP SIGNATURE- -- *Wolfgang Qual * *Referat für Gesundheit und Umwelt* Umweltschutz Umweltvorsorge RGU-UW 11 Bayerstraße 28a 80335 München Telefon +49 - 89 - 233 - 4 77 17 Telefax +49 - 89 - 233 - 4 77 05 http://www.muenchen.de/umweltatlas [EMAIL PROTECTED] Bitte beachten Sie die Hinweise zur elektronischen Kommunikation mit der Landeshauptstadt München: http://www.muenchen.de/ekomm ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] Writing plugins::"export selected object to OGR"
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 I believe the new python bindings will make this far easier. pc Wolfgang Qual ha scritto: > Hi list, > I do not have any experience in writing plugins for QGIS, but I am just > curious: would it be hard to write a plugin for QGIS, which would allow > the user to > export a selection of a layer (or the whole layer) into choosable > ogr-format? > Ogr2ogr should be used for this purpose (using the sql-option). I think, > having such a plugin would be great, as QGIS offers the possibility to > perform a)queries on attribute table and b) a seletion by simply > click&drag with the mouse. At the moment, it is only possible to extract > selected features with GRASS-data. Therefore, I first have to import the > whole dataset into GRASS and do the select afterwards. > > What do you think? > Wolfgang - -- Paolo Cavallini email+jabber: [EMAIL PROTECTED] www.faunalia.it Piazza Garibaldi 5 - 56025 Pontedera (PI), Italy Tel: (+39)348-3801953 -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFyGhB/NedwLUzIr4RAqEGAJ4oiY5OqWJ2Qh3UQ/YRfzKSL3S38wCfcj6p Laz1Uf+beDAJ53QQUweAizg= =GzbM -END PGP SIGNATURE- ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
[Qgis-user] Writing plugins::"export selected object to OGR"
Hi list, I do not have any experience in writing plugins for QGIS, but I am just curious: would it be hard to write a plugin for QGIS, which would allow the user to export a selection of a layer (or the whole layer) into choosable ogr-format? Ogr2ogr should be used for this purpose (using the sql-option). I think, having such a plugin would be great, as QGIS offers the possibility to perform a)queries on attribute table and b) a seletion by simply click&drag with the mouse. At the moment, it is only possible to extract selected features with GRASS-data. Therefore, I first have to import the whole dataset into GRASS and do the select afterwards. What do you think? Wolfgang -- *Wolfgang Qual * *Referat für Gesundheit und Umwelt* Umweltschutz Umweltvorsorge RGU-UW 11 Bayerstraße 28a 80335 München Telefon +49 - 89 - 233 - 4 77 17 Telefax +49 - 89 - 233 - 4 77 05 http://www.muenchen.de/umweltatlas [EMAIL PROTECTED] Bitte beachten Sie die Hinweise zur elektronischen Kommunikation mit der Landeshauptstadt München: http://www.muenchen.de/ekomm ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
