Re: [Qgis-user] Transformation using NTv2 grids
Hi there, reactivating this thread and also pushing it to the dev list to maybe receive a statement: Is it somehow planned to include the BETA2007.gsb and the resulting changes into QGIS for 2.8 by default? I received already some questions, cause now even german bureaucracy is waking up and tell users to switch to ETRS and transform the data from Gauss-Krueger. But for the majority of QGIS users, this will be rocket science if they even learn THAT they have to create custom CRS, change srs.db entries and do other wizardry. So far, googling QGIS and BETA2007 yields no results on any moves into this direction. But without, QGIS users in Germany will likely produce tons of trash data in the near future or already do so without knowing (me included till today). Also see https://hub.qgis.org/issues/11347 ... or is is not that critical as I believe it is? Cheers Bernd Am 05.02.2014, 16:13 Uhr, schrieb Marco Hugentobler marco.hugentob...@sourcepole.ch: Hi Would it be possible to define a Custom CRS for the source CRS containing the nadgrids-stuff for doing ntv2 transformation in QGIS 2.0.1? Yes, it is possible to work with custom CRS (although it is not so convenient). Is this already in 2.1? If yes, where could one find it? There is a dialog showing the available datum transformations. This dialog shows up as soon as a layer needs a datum transformation (e.g. if on-the-fly reprojection is toggled or when doing save as'). However, the ntv2 transformation info has to be inserted into srs.db / table datum_transform first. Regards, Marco On 05.02.2014 15:42, Robert Nuske wrote: Hi Marco, QGIS 2.2 will have support for NTv2 datum transformations as a core function. Is this already in 2.1? If yes, where could one find it? Would it be possible to define a Custom CRS for the source CRS containing the nadgrids-stuff for doing ntv2 transformation in QGIS 2.0.1? For example GK3: +proj=tmerc +lat_0=0 +lon_0=9 +k=1.00 +x_0=350 +y_0=0 +ellps=bessel +units=m +nadgrids=BETA2007.gsb +wktext cheers, robert On 05.02.2014 13:34, Burgstaller Stefan wrote: Hi, is it already possible to reproject shape-files using NTv2 grids? I was looking for appropriate plugins, help documents and already available tools but I have not found anything. Since the federal states in Germany start to convert their geospatial data from Gauss-Kruger to ETRS89 with NTv2 grids this topic becomes more and more urgent. Greetings, Stefan Burgstaller ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- Bernd Vogelgesang Siedlerstraße 2 91083 Baiersdorf/Igelsdorf Tel: 09133-825374 ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Transformation using NTv2 grids
Am 17.02.2015 um 17:33 schrieb Pedro Venâncio: Here [0] we have an explanation of how the coordinate systems works in general, and in particular in QGIS. You also find solutions to use the NTv2 grids with QGIS. Unfortunately, the text is in portuguese, but perhaps Google Translate can help [1]. To be honest, gooogle translate is of limited help for people who use English only as a second language. I think it would help more if you set up a special English page, as the Dutch QGIS community does for issues with worldwide interest. And http://planet.qgis.org/planet/ would be a good platform to promote those topics. This is a way that each user must do individually. To make life easier for portuguese users, as we also have a lot of information that needs to be transformed to ETRS89, portuguese QGIS User Group developed the plugin that Giovanni told you [2], which greatly simplifies things, because it is integrated into Processing Toolbox and already provides the NTv2 grids. As Giovanni said, if there is interest from other countries and if we can freely redistribute the NTv2 grids, we can expand the plugin. There are lots of ntv2 grids available for free, and telling the user : Put your local ntv2 grid in here is affordable. That works for non-free grids too. Greetings, André Joost ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Transformation using NTv2 grids
Look here: http://www.gkg-kassel.de/pdf/Praezise_Transformation_im_QGIS_mit_Batchmodus.pdf Cheers Claas Am 17.02.2015 um 15:26 schrieb Bernd Vogelgesang: Hi there, reactivating this thread and also pushing it to the dev list to maybe receive a statement: Is it somehow planned to include the BETA2007.gsb and the resulting changes into QGIS for 2.8 by default? I received already some questions, cause now even german bureaucracy is waking up and tell users to switch to ETRS and transform the data from Gauss-Krueger. But for the majority of QGIS users, this will be rocket science if they even learn THAT they have to create custom CRS, change srs.db entries and do other wizardry. So far, googling QGIS and BETA2007 yields no results on any moves into this direction. But without, QGIS users in Germany will likely produce tons of trash data in the near future or already do so without knowing (me included till today). Also see https://hub.qgis.org/issues/11347 ... or is is not that critical as I believe it is? Cheers Bernd Am 05.02.2014, 16:13 Uhr, schrieb Marco Hugentobler marco.hugentob...@sourcepole.ch: Hi Would it be possible to define a Custom CRS for the source CRS containing the nadgrids-stuff for doing ntv2 transformation in QGIS 2.0.1? Yes, it is possible to work with custom CRS (although it is not so convenient). Is this already in 2.1? If yes, where could one find it? There is a dialog showing the available datum transformations. This dialog shows up as soon as a layer needs a datum transformation (e.g. if on-the-fly reprojection is toggled or when doing save as'). However, the ntv2 transformation info has to be inserted into srs.db / table datum_transform first. Regards, Marco On 05.02.2014 15:42, Robert Nuske wrote: Hi Marco, QGIS 2.2 will have support for NTv2 datum transformations as a core function. Is this already in 2.1? If yes, where could one find it? Would it be possible to define a Custom CRS for the source CRS containing the nadgrids-stuff for doing ntv2 transformation in QGIS 2.0.1? For example GK3: +proj=tmerc +lat_0=0 +lon_0=9 +k=1.00 +x_0=350 +y_0=0 +ellps=bessel +units=m +nadgrids=BETA2007.gsb +wktext cheers, robert On 05.02.2014 13:34, Burgstaller Stefan wrote: Hi, is it already possible to reproject shape-files using NTv2 grids? I was looking for appropriate plugins, help documents and already available tools but I have not found anything. Since the federal states in Germany start to convert their geospatial data from Gauss-Kruger to ETRS89 with NTv2 grids this topic becomes more and more urgent. Greetings, Stefan Burgstaller ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Transformation using NTv2 grids
Hi Marco thanks for your insightful answer. Is this already in 2.1? If yes, where could one find it? There is a dialog showing the available datum transformations. This dialog shows up as soon as a layer needs a datum transformation (e.g. if on-the-fly reprojection is toggled or when doing save as'). However, the ntv2 transformation info has to be inserted into srs.db / table datum_transform first. I've seen that dialog in 2.1 but couldn't find an entry for ntv2? Will the datum_transform table have entries for common ntv2-transformations when 2.2 is released? cheers robert ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Transformation using NTv2 grids
Hi, is it already possible to reproject shape-files using NTv2 grids? I was looking for appropriate plugins, help documents and already available tools but I have not found anything. Since the federal states in Germany start to convert their geospatial data from Gauss-Kruger to ETRS89 with NTv2 grids this topic becomes more and more urgent. Greetings, Stefan Burgstaller ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Transformation using NTv2 grids
Burgstaller Stefan Burgstaller@... writes: Hi, is it already possible to reproject shape-files using NTv2 grids? I was looking for appropriate plugins, help documents and already available tools but I have not found anything. Since the federal states in Germany start to convert their geospatial data from Gauss-Kruger to ETRS89 with NTv2 grids this topic becomes more and more urgent. Hi, Just had a try last week after getting a shift grid file kkj_eureffin.ct2 for Finnish Gauss-Kruger - ETRS89. Usage is like this (I gave all the proj parameters by hand so I knew that just they were used): ogr2ogr -f ESRI Shapefile -s_srs +proj=tmerc +lat_0=0 +lon_0=27 +k=1 +x_0=350 +y_0=0 +ellps=intl +towgs84=-96.0617,-82.4278,-121.7535,4.80107,0.34543,-1.37646,1.4964 +units=m +nadgrids=.\kkj_eureffin.ct2 -t_srs +proj=utm +zone=35 +ellps=GRS80 +units=m +towgs84=0,0,0,0 +no_defs accurate_conversion_to_epsg_3067.shp original_epsg_2393.shp Took 2 minutes with a laptop to convert 1.2 million simple polygons. -Jukka Rahkonen- Greetings, Stefan Burgstaller ___ Qgis-user mailing list Qgis-user@... http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Transformation using NTv2 grids
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Il 05/02/2014 13:34, Burgstaller Stefan ha scritto: Hi, is it already possible to reproject shape-files using NTv2 grids? I was looking for appropriate plugins, help documents and already available tools but I have not found anything. Since the federal states in Germany start to convert their geospatial data from Gauss-Kruger to ETRS89 with NTv2 grids this topic becomes more and more urgent. Hi Stefan, this is easy with our plugin Transformation Tools: http://plugins.qgis.org/plugins/TransformationTools/ Unfortunately we do not have budget to port it to QGIS 2. If you have the development skills you are welcome to submit a patch, otherwise you can sponsor one developer to do it. All the best. - -- Paolo Cavallini - www.faunalia.eu Corsi QGIS e PostGIS: http://www.faunalia.eu/training.html -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: Using GnuPG with Icedove - http://www.enigmail.net/ iEYEARECAAYFAlLyPEsACgkQ/NedwLUzIr5SEACgnAIGcUeokdPlGCf2PWSwSzpm vUYAoLML/J+CKVIvnUJ1FL1QzAgcVnRP =59mq -END PGP SIGNATURE- ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Transformation using NTv2 grids
Hi Stefan QGIS 2.2 will have support for NTv2 datum transformations as a core function. Regards, Marco On 05.02.2014 13:34, Burgstaller Stefan wrote: Hi, is it already possible to reproject shape-files using NTv2 grids? I was looking for appropriate plugins, help documents and already available tools but I have not found anything. Since the federal states in Germany start to convert their geospatial data from Gauss-Kruger to ETRS89 with NTv2 grids this topic becomes more and more urgent. Greetings, Stefan Burgstaller ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- Dr. Marco Hugentobler Sourcepole - Linux Open Source Solutions Weberstrasse 5, CH-8004 Zürich, Switzerland marco.hugentob...@sourcepole.ch http://www.sourcepole.ch Technical Advisor QGIS Project Steering Committee ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Transformation using NTv2 grids
Hi Marco, QGIS 2.2 will have support for NTv2 datum transformations as a core function. Is this already in 2.1? If yes, where could one find it? Would it be possible to define a Custom CRS for the source CRS containing the nadgrids-stuff for doing ntv2 transformation in QGIS 2.0.1? For example GK3: +proj=tmerc +lat_0=0 +lon_0=9 +k=1.00 +x_0=350 +y_0=0 +ellps=bessel +units=m +nadgrids=BETA2007.gsb +wktext cheers, robert On 05.02.2014 13:34, Burgstaller Stefan wrote: Hi, is it already possible to reproject shape-files using NTv2 grids? I was looking for appropriate plugins, help documents and already available tools but I have not found anything. Since the federal states in Germany start to convert their geospatial data from Gauss-Kruger to ETRS89 with NTv2 grids this topic becomes more and more urgent. Greetings, Stefan Burgstaller ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Transformation using NTv2 grids
Hi Would it be possible to define a Custom CRS for the source CRS containing the nadgrids-stuff for doing ntv2 transformation in QGIS 2.0.1? Yes, it is possible to work with custom CRS (although it is not so convenient). Is this already in 2.1? If yes, where could one find it? There is a dialog showing the available datum transformations. This dialog shows up as soon as a layer needs a datum transformation (e.g. if on-the-fly reprojection is toggled or when doing save as'). However, the ntv2 transformation info has to be inserted into srs.db / table datum_transform first. Regards, Marco On 05.02.2014 15:42, Robert Nuske wrote: Hi Marco, QGIS 2.2 will have support for NTv2 datum transformations as a core function. Is this already in 2.1? If yes, where could one find it? Would it be possible to define a Custom CRS for the source CRS containing the nadgrids-stuff for doing ntv2 transformation in QGIS 2.0.1? For example GK3: +proj=tmerc +lat_0=0 +lon_0=9 +k=1.00 +x_0=350 +y_0=0 +ellps=bessel +units=m +nadgrids=BETA2007.gsb +wktext cheers, robert On 05.02.2014 13:34, Burgstaller Stefan wrote: Hi, is it already possible to reproject shape-files using NTv2 grids? I was looking for appropriate plugins, help documents and already available tools but I have not found anything. Since the federal states in Germany start to convert their geospatial data from Gauss-Kruger to ETRS89 with NTv2 grids this topic becomes more and more urgent. Greetings, Stefan Burgstaller ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- Dr. Marco Hugentobler Sourcepole - Linux Open Source Solutions Weberstrasse 5, CH-8004 Zürich, Switzerland marco.hugentob...@sourcepole.ch http://www.sourcepole.ch Technical Advisor QGIS Project Steering Committee ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
