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To use it within the plugin you must install it to your Qgis Python instance (located in your OSGeo4W folder on windows). For instructions on installing into Qgis's python you can see this guide. …

You could add a new geometry column to your table with the specified point/line/poly and then copy the geometry from the current geometry column. ALTER TABLE your_table ADD COLUMN geom geometry(POI …

You need to tell QGIS that the database server is on running localhost. Try making Host = 'localhost'. Also you are trying to connect to the postgres maintenance db. …

You can specify the CRS when you create your memory layer: vl = QgsVectorLayer('LineString?crs=EPSG:2964', 'MyLayer' , 'memory')

Assuming you are using PostGIS, you may want to look into implementing your own edit tracking system in postgres. A great tutorial can be found at this blog. The general idea is that after each edit …

If you are using psycopg2 then you can close the connection to Postgres like so con.close()

You can grab the text like so: text = self.your_plugin_dlg.ui.yourLineEdit.text()

I am trying to display a vertex marker for a QGIS Python plugin I am writing. I am getting a the following error... …

You need to enable it in the plugins menu. Goto 'Plugins' > 'Manage and install plugins' > 'Installed'. Then make sure GDAL Georeferencer is ticked.

Yes this is possible. I think you are looking for a checkbox. self.yourCheckbox = QtGui.QCheckBox(self.layoutWidget) self.yourCheckbox.setObjectName(_fromUtf8("Checkboxname")) Then to see if its ch …

You can achieve this using PostGIS spatial functions. St_Within will return True if geom A is totally within geom B. There are other similar functions you can use if this isn’t suitable, check the d …

For my python plugin I would like to remove a VertexMarker when the user pans/zooms there map. Which is the best way to detect a canvas refresh or pan/zoom carried out by the user? Can you suggest …

It does sounds like you have changed the CRS half through adding the features. You can re-project those points by selecting them, then right click on the shapefile layer in the table of contents and …

I am building a QGIS plugin and would like to use a dock widget. I have used QT creator to design the UI, with the object type being a QDockWidget. … When the plugin is enabled in QGIS the DockWidget appears to be inside a normal dialog box. I am therefore unable to dock the plugin to the toolbar space etc... …

I have written a simple QGIS plugin which zooms the map canvas to a user specified UK postcode. … This is too large to upload to the qgis repository and impractical to download and share. …