On 2011-12-14 13:55, francescobocca...@libero.it wrote: > Hi, > i tried it but it works only with point tranformation. I would llike to > tranform the entire vector layer. > Do you have any suggestions?
Mmm, you are right, I only used it for one feature at the time. Then I think you just have to loop over every feature in the layer that you want to transform, and transform the geometry of each feature one by one? Given the QgsCoordinateTransform-object, you can transform one geometry by using it's 'transform' method: http://qgis.org/api/classQgsGeometry.html#46fd84e518cae4368aadeeac89574dfa Some copy and paste from imagemapplugin.py: destinationSrs = self.iface.mapCanvas().mapRenderer().destinationSrs() layerSrs = self.iface.activeLayer().srs() srsTransform = QgsCoordinateTransform(layerSrs, destinationSrs) ... self.provider.select(self.provider.attributeIndexes(), mapCanvasExtent, True, True) ... feature = QgsFeature(); while self.rovider.nextFeature(feature): feature.geom.transform(srsTransform) ... See here: http://www.qgis.org/pyqgis-cookbook/vector.html#writing-vector-layers how to write a new file. Devs, please let know if this is not ok.... By the way, I assume you are doing this from within a plugin or some python code? Because qgis itself can do coordinatetransformations for you when you use 'save layer as' .... in the gui. HTH, Richard Duivenvoorde _______________________________________________ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
