[gdal-dev] Displaying vector files
Hi all, I am writing an application to load vector maps/shape files using gdal/ogr and display them onto a gui designed using Qt. I am new to dealing with vector files, I am not able to decide how to render them on GUI. Few approaches that come to my mind are: - To convert vector files to raster and display them as raster.. - To draw each shape in vector file one by one (i dont know how to do this, I dont even know whether it would be even possible this using GDAL/OGR, or how complex this would be because in my case vector files can be very complex) The decision how to render vector files is very important for me, because after displaying vector files i need to support some advanced features like projection change, interactive selection, Geo-referencing etc. Can any one who has worked on vector/gis stuff, tell me how this is usually done and what Qt widget is used for displaying such data. Thanks, Akshay gupta ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Displaying vector files
On 05/06/12 09:40, akshay gupta wrote: Hi all, I am writing an application to load vector maps/shape files using gdal/ogr and display them onto a gui designed using Qt. I am new to dealing with vector files, I am not able to decide how to render them on GUI. Few approaches that come to my mind are: - To convert vector files to raster and display them as raster.. - To draw each shape in vector file one by one (i dont know how to do this, I dont even know whether it would be even possible this using GDAL/OGR, or how complex this would be because in my case vector files can be very complex) The decision how to render vector files is very important for me, because after displaying vector files i need to support some advanced features like projection change, interactive selection, Geo-referencing etc. Can any one who has worked on vector/gis stuff, tell me how this is usually done and what Qt widget is used for displaying such data. Thanks, Akshay gupta Hello, You should have a look at the QGIS project : www.qgis.org It displays vector data using GDAL/OGR and Qt, that's exactly what you want to do. Jean-Claude ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Displaying vector files
You can also create a custom application based on QGis, if you do not want the entire QGis interface or if you want to customize the UI (or integrate it with your existing application). Etienne On Sun, May 6, 2012 at 5:17 AM, Jean-Claude Repetto wrote: > On 05/06/12 09:40, akshay gupta wrote: >> >> Hi all, >> >> I am writing an application to load vector maps/shape files using >> gdal/ogr and display them onto a gui designed using Qt. I am new to >> dealing with vector files, I am not able to decide how to render them on >> GUI. Few approaches that come to my mind are: >> - To convert vector files to raster and display them as raster.. >> - To draw each shape in vector file one by one (i dont know how to do >> this, I dont even know whether it would be even possible this using >> GDAL/OGR, or how complex this would be because in my case vector files >> can be very complex) >> >> The decision how to render vector files is very important for me, >> because after displaying vector files i need to support some advanced >> features like projection change, interactive selection, Geo-referencing >> etc. >> >> Can any one who has worked on vector/gis stuff, tell me how this is >> usually done and what Qt widget is used for displaying such data. >> >> Thanks, >> Akshay gupta > > > > Hello, > > You should have a look at the QGIS project : www.qgis.org > It displays vector data using GDAL/OGR and Qt, that's exactly what you want > to do. > > Jean-Claude > > ___ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/gdal-dev ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
