[Qgis-developer] How to get feat.geometry() from SpatiaLite in pyQGis ?
Hello all, as in object, within pyQGis I need to read the geometry of a SpatiaLite vector layer. This is my source code: layer = iface.mapCanvas().currentLayer() iter = layer.getFeatures() for feat in iter: geom = feat.geometry() elem = geom.asPolyline() print(ELEM %s\n) %(elem) for p1 in elem: x1,y1 = p1.x(),p1.y() print(XY= %lf %lf\n) %(x1, y1) But... it returns only: ELEM [] ELEM [] ELEM [] ELEM [] etcetera, instead of something like this : ELEM [(2.37786e+06,4.60302e+06), (2.37784e+06,4.60304e+06)] ... that I had with a normal qgis layer. Sure, I miss something. Somebody can help me to understand how to get geometry from SpatiaLite ? Thank you in advance Roberto ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] How to get feat.geometry() from SpatiaLite in pyQGis ?
Hi, Roberto: I think the query from layer.getFeatures() returns an iterator and that means you use the nextFeature(feat) to get the next feature until it fails to return a feature, then it means you have reached the end of the iterator list. iter = layer.getFeatures() while iter.nextFeature(feat): geom = feat.geometry() elem = geom.asPolyline() print(ELEM %s\n) %(elem) for p1 in elem: x1,y1 = p1.x(),p1.y() print(XY= %lf %lf\n) %(x1, y1) Should work for you, - Maaza Christos, PhD www.Axumcorp.com -- View this message in context: http://osgeo-org.1560.x6.nabble.com/How-to-get-feat-geometry-from-SpatiaLite-in-pyQGis-tp5092891p5093041.html Sent from the Quantum GIS - Developer mailing list archive at Nabble.com. ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
[Qgis-developer] C++ Plugins failing due to upgrade (missing what procedue)?
I am getting this error message with my C++ plugins and am wondering why? Can anyone help solve this puzzle? Is there any documentation that tells what has changed as far as plugins written in C++ for QGIS 2.0 to install them? It seems to me that there may be a procedure that it is lookign for in the plugin that used to install in the past. I see several other plugins also fail due to the same error message. I see what Nathan was saying that C++ plugins are getting by the way side due to lack of maintenance. But I am tryign to maintain and I need information to do it. Below is the message I get for several plugins including my own, Failed to load C:/Program Files/qgis2.1.0/plugins/sqlanywhereprovider.dll (Reason: Cannot load library C:/Program Files/qgis2.1.0/plugins/sqlanywhereprovider.dll: The specified procedure could not be found.) Thank you, Maaza - Maaza Christos, PhD www.Axumcorp.com -- View this message in context: http://osgeo-org.1560.x6.nabble.com/C-Plugins-failing-due-to-upgrade-missing-what-procedue-tp5093042.html Sent from the Quantum GIS - Developer mailing list archive at Nabble.com. ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] layer order
Open the project file and look for the list of layers. I think the order is based on how it is stored in the project file. Something must be happening while saving the project. - Maaza Christos, PhD www.Axumcorp.com -- View this message in context: http://osgeo-org.1560.x6.nabble.com/layer-order-tp5092676p5093044.html Sent from the Quantum GIS - Developer mailing list archive at Nabble.com. ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
