Re: [Qgis-user] Export WKT format
Hi Andrew, WKT is a format for geometries and not a file type. Therefore it is not possible to offer a save as WKT just like that. You can however easily choose Comma Separated Value as export format and then choose AS_WKT in the Geometry combobox under layer options. Best regards, Matthias On 20.10.2014 18:35, Andrew Gillett wrote: > It is possible to export in WKT format by copying then pasting into a > text editor. However, there is no WKT option when exporting via Layer > -> Save As. Is there a particular reason for this, or is there a > development list where I could request this? > ___ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-user -- Help getting QGIS to the next level of quality before November 15! http://blog.vitu.ch/10102014-1046/crowdfunding-initiative-automated-testing ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Export WKT format
Thanks for the info. I've just tried this and there appears to be a bug in it. I'm using the country border data from here: http://www.naturalearthdata.com/downloads/10m-cultural-vectors/ If, for example, I select Iceland and export as you suggested, the column for the polygon data is truncated. Only about 200 vertices are exported, as compared to around 3000 which are correctly present if I use the copy/paste method. The polygon data ends with an X coordinate but no Y coordinate, and the closing brackets and quote mark are also missing. On 20/10/2014 17:39, Matthias Kuhn wrote: Hi Andrew, WKT is a format for geometries and not a file type. Therefore it is not possible to offer a save as WKT just like that. You can however easily choose Comma Separated Value as export format and then choose AS_WKT in the Geometry combobox under layer options. Best regards, Matthias On 20.10.2014 18:35, Andrew Gillett wrote: It is possible to export in WKT format by copying then pasting into a text editor. However, there is no WKT option when exporting via Layer -> Save As. Is there a particular reason for this, or is there a development list where I could request this? ___ 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] Export WKT format
That sounds like it's hitting some sort of line limit. Might be a bug in OGR. You could try writing WKT to a column first, but it would have to be in a layer type that supports long text fields. That said WKT is not a great format for complex geometries. Perhaps you can tell us your goal and we can suggest another way to get there. Thanks, Alex On 10/20/2014 10:21 AM, Andrew Gillett wrote: > Thanks for the info. I've just tried this and there appears to be a bug > in it. I'm using the country border data from here: > > http://www.naturalearthdata.com/downloads/10m-cultural-vectors/ > > If, for example, I select Iceland and export as you suggested, the > column for the polygon data is truncated. Only about 200 vertices are > exported, as compared to around 3000 which are correctly present if I > use the copy/paste method. The polygon data ends with an X coordinate > but no Y coordinate, and the closing brackets and quote mark are also > missing. > > > On 20/10/2014 17:39, Matthias Kuhn wrote: >> Hi Andrew, >> >> WKT is a format for geometries and not a file type. Therefore it is not >> possible to offer a save as WKT just like that. You can however easily >> choose Comma Separated Value as export format and then choose AS_WKT in >> the Geometry combobox under layer options. >> >> Best regards, >> Matthias >> >> >> On 20.10.2014 18:35, Andrew Gillett wrote: >>> It is possible to export in WKT format by copying then pasting into a >>> text editor. However, there is no WKT option when exporting via Layer >>> -> Save As. Is there a particular reason for this, or is there a >>> development list where I could request this? >>> ___ >>> 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] Export WKT format
KML isn't a good choice, as it's always Lat/Lon WGS84. GML might work, but give GeoJson a shot first - it's simpler than GML to parse (actually little or no parsing required). Did you try ogr2ogr on the commandline to make sure it's not a bug in the QGIS writer for long lines? Thanks, Alex On 10/20/2014 11:11 AM, Andrew Gillett wrote: > I wrote my parser for WKT as it was the quickest and simplest format to > parse that I was aware of I only need the country border data, and > could see how to parse this just by looking at the file, whereas other > formats would have needed more research. > > The problem is with exporting the WKT using a specified projection. At > the moment I have to export an intermediate format to get the projection > right, then load that back in and copy/paste for the WKT. > > I am now looking into using KML or GML instead. > > > On 20/10/2014 18:26, Alex Mandel wrote: >> That sounds like it's hitting some sort of line limit. Might be a bug in >> OGR. You could try writing WKT to a column first, but it would have to >> be in a layer type that supports long text fields. >> >> That said WKT is not a great format for complex geometries. Perhaps you >> can tell us your goal and we can suggest another way to get there. >> >> Thanks, >> Alex >> >> On 10/20/2014 10:21 AM, Andrew Gillett wrote: >>> Thanks for the info. I've just tried this and there appears to be a bug >>> in it. I'm using the country border data from here: >>> >>> http://www.naturalearthdata.com/downloads/10m-cultural-vectors/ >>> >>> If, for example, I select Iceland and export as you suggested, the >>> column for the polygon data is truncated. Only about 200 vertices are >>> exported, as compared to around 3000 which are correctly present if I >>> use the copy/paste method. The polygon data ends with an X coordinate >>> but no Y coordinate, and the closing brackets and quote mark are also >>> missing. >>> >>> >>> On 20/10/2014 17:39, Matthias Kuhn wrote: Hi Andrew, WKT is a format for geometries and not a file type. Therefore it is not possible to offer a save as WKT just like that. You can however easily choose Comma Separated Value as export format and then choose AS_WKT in the Geometry combobox under layer options. Best regards, Matthias On 20.10.2014 18:35, Andrew Gillett wrote: > It is possible to export in WKT format by copying then pasting into a > text editor. However, there is no WKT option when exporting via Layer > -> Save As. Is there a particular reason for this, or is there a > development list where I could request this? > ___ > 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 > -- Alex Mandel http://wildintellect.com ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Export WKT format
Hi, I think the WKT issue is an OGR one : https://trac.osgeo.org/gdal/ticket/5508 It should work in QGIS master 2014-10-20 20:31 GMT+02:00 Alex Mandel : > KML isn't a good choice, as it's always Lat/Lon WGS84. > GML might work, but give GeoJson a shot first - it's simpler than GML to > parse (actually little or no parsing required). > > Did you try ogr2ogr on the commandline to make sure it's not a bug in > the QGIS writer for long lines? > > Thanks, > Alex > > On 10/20/2014 11:11 AM, Andrew Gillett wrote: > > I wrote my parser for WKT as it was the quickest and simplest format to > > parse that I was aware of – I only need the country border data, and > > could see how to parse this just by looking at the file, whereas other > > formats would have needed more research. > > > > The problem is with exporting the WKT using a specified projection. At > > the moment I have to export an intermediate format to get the projection > > right, then load that back in and copy/paste for the WKT. > > > > I am now looking into using KML or GML instead. > > > > > > On 20/10/2014 18:26, Alex Mandel wrote: > >> That sounds like it's hitting some sort of line limit. Might be a bug in > >> OGR. You could try writing WKT to a column first, but it would have to > >> be in a layer type that supports long text fields. > >> > >> That said WKT is not a great format for complex geometries. Perhaps you > >> can tell us your goal and we can suggest another way to get there. > >> > >> Thanks, > >> Alex > >> > >> On 10/20/2014 10:21 AM, Andrew Gillett wrote: > >>> Thanks for the info. I've just tried this and there appears to be a bug > >>> in it. I'm using the country border data from here: > >>> > >>> http://www.naturalearthdata.com/downloads/10m-cultural-vectors/ > >>> > >>> If, for example, I select Iceland and export as you suggested, the > >>> column for the polygon data is truncated. Only about 200 vertices are > >>> exported, as compared to around 3000 which are correctly present if I > >>> use the copy/paste method. The polygon data ends with an X coordinate > >>> but no Y coordinate, and the closing brackets and quote mark are also > >>> missing. > >>> > >>> > >>> On 20/10/2014 17:39, Matthias Kuhn wrote: > Hi Andrew, > > WKT is a format for geometries and not a file type. Therefore it is > not > possible to offer a save as WKT just like that. You can however easily > choose Comma Separated Value as export format and then choose AS_WKT > in > the Geometry combobox under layer options. > > Best regards, > Matthias > > > On 20.10.2014 18:35, Andrew Gillett wrote: > > It is possible to export in WKT format by copying then pasting into a > > text editor. However, there is no WKT option when exporting via Layer > > -> Save As. Is there a particular reason for this, or is there a > > development list where I could request this? > > ___ > > 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 > > > > > -- > Alex Mandel > http://wildintellect.com > ___ > 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] Export WKT format
That was my suspicion. Though since it's an OGR issue, you just need a newer GDAL/OGR not necessarily newer QGIS. Updating just GDAL/OGR depends on your operating system but should be possible on most systems. Thanks, Alex On 10/20/2014 12:34 PM, Junior Delaz wrote: > Hi, > I think the WKT issue is an OGR one : > https://trac.osgeo.org/gdal/ticket/5508 > It should work in QGIS master > > 2014-10-20 20:31 GMT+02:00 Alex Mandel : > >> KML isn't a good choice, as it's always Lat/Lon WGS84. >> GML might work, but give GeoJson a shot first - it's simpler than GML to >> parse (actually little or no parsing required). >> >> Did you try ogr2ogr on the commandline to make sure it's not a bug in >> the QGIS writer for long lines? >> >> Thanks, >> Alex >> >> On 10/20/2014 11:11 AM, Andrew Gillett wrote: >>> I wrote my parser for WKT as it was the quickest and simplest format to >>> parse that I was aware of – I only need the country border data, and >>> could see how to parse this just by looking at the file, whereas other >>> formats would have needed more research. >>> >>> The problem is with exporting the WKT using a specified projection. At >>> the moment I have to export an intermediate format to get the projection >>> right, then load that back in and copy/paste for the WKT. >>> >>> I am now looking into using KML or GML instead. >>> >>> >>> On 20/10/2014 18:26, Alex Mandel wrote: That sounds like it's hitting some sort of line limit. Might be a bug in OGR. You could try writing WKT to a column first, but it would have to be in a layer type that supports long text fields. That said WKT is not a great format for complex geometries. Perhaps you can tell us your goal and we can suggest another way to get there. Thanks, Alex On 10/20/2014 10:21 AM, Andrew Gillett wrote: > Thanks for the info. I've just tried this and there appears to be a bug > in it. I'm using the country border data from here: > > http://www.naturalearthdata.com/downloads/10m-cultural-vectors/ > > If, for example, I select Iceland and export as you suggested, the > column for the polygon data is truncated. Only about 200 vertices are > exported, as compared to around 3000 which are correctly present if I > use the copy/paste method. The polygon data ends with an X coordinate > but no Y coordinate, and the closing brackets and quote mark are also > missing. > > > On 20/10/2014 17:39, Matthias Kuhn wrote: >> Hi Andrew, >> >> WKT is a format for geometries and not a file type. Therefore it is >> not >> possible to offer a save as WKT just like that. You can however easily >> choose Comma Separated Value as export format and then choose AS_WKT >> in >> the Geometry combobox under layer options. >> >> Best regards, >> Matthias >> >> >> On 20.10.2014 18:35, Andrew Gillett wrote: >>> It is possible to export in WKT format by copying then pasting into a >>> text editor. However, there is no WKT option when exporting via Layer >>> -> Save As. Is there a particular reason for this, or is there a >>> development list where I could request this? >>> ___ >>> 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 >>> >> >> >> -- >> Alex Mandel >> http://wildintellect.com ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
