On Friday 28 March 2008 03:15:06 pm you wrote: > I believe QGIS uses GDAL/OGR to access S-57 datasets. These data include a > range of attributes not supported by common GIS formats, such as > shapefiles, and the OGR support is (unfortunately) read only. Any issues > with QGIS and S-57 access are probably better addressed in GDAL/OGR forums.
Thanks for the detailed explanation. Its really appreciated. > One workaround would perhaps be to implement a PostGIS database essentially > replicating your S-57 data, generated automatically or manually from the > S-57 files, and use this to provide the data to be plotted by QGIS. I will have to investigate this approach to see if it works. > I assume the issues with an S-57 writer is that many of the fields in this > format are not easily derived from many other GIS formats, so a > straightforward conversion is often not possible, thus a generic writer has > not been implemented, making it difficult to move the PostGIS data back to > S-57. OK..im starting to understand the issues now. > Information about the support for S-57 provided by GDAL/OGR is at: > http://www.gdal.org/ogr/drv_s57.html > http://home.gdal.org/projects/s57/index.html Thanks > I'm not a great fan of managing data in shapefiles, but they are a useful > format for transferring data between applications. An application like the > new CARIS S-57 composer, which can import shapefiles to generate S-57 > files, might be useful, but is commercial software. Knowing Caris & GIS > generally, it probably ain't cheap. and closed source apps are not really an option for this project. > An approach building & managing your data in PostGIS, then exporting to > shapefile to build S-57 charts with the Caris software might be viable, and > still much cheaper that a totally commercial solution. This would allow > QGIS & most other FOSS GIS tools to interact with the data, for viweing, > editing & managing it. > > http://www.caris.com/news/story.cfm?id=41 > > > HTH, Yup helps a lot. Its very much appreciated. Best regards -- /ch _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
