On 09/01/2011 10:45 AM, kimaidou wrote: > Hi list > > I would like to know if there was a dedicated api method to create a new > vector layer (and save it into a file) by copying a map canvas layer > (which could be postgis, shapefile, etc.). > I have read here > http://www.qgis.org/pyqgis-cookbook/vector.html#writing-shapefiles > how to write a new shapefile. But then I would need to "manually" copy > each feature from the chosen layer to the new one. > > I was thinking of a equivalent to the right-click "Save as" which brings > an ui to choose the targer layer format, srid, etc., but I am trying to > do it programatically. > > Is there a proper way to do it ?
Don't know if it is 'proper', but I can write a vector layer with the method writeAsVectorFormat from QgsVectorFileWriter, see http://doc.qgis.org/head/classQgsVectorFileWriter.html#3a4405a59d8f8ac147878cae5bd9bade To test: on an active vector layer (selected in legend), do the following in the qgis python console: i = qgis.utils.iface l = i.activeLayer() qgis.core.QgsVectorFileWriter.writeAsVectorFormat(l, '/tmp/myjson.json', 'utf-8', l.crs(), 'GeoJson') and you should find your json in /tmp :-) (for more possibilities (like only saving selected features etc) see docs. Regards Richard Duivenvoorde _______________________________________________ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
