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Feb
5
revised Virtual fields are lost when duplicate layers
added 185 characters in body
Feb
5
answered Virtual fields are lost when duplicate layers
Feb
2
comment Join by attribute / field calculator SQL in QGIS
This is something that is not (yet) possible with QGIS. In general this is discussed under the term "aggregate functions" and I am confident that we will see this in a not-too-far-in-the-future release. Meanwhile I would recommend to use a database (e.g. postgres) solution or there may be a tool in processing which I'm not aware of right now.
Feb
2
revised Join by attribute / field calculator SQL in QGIS
edited tags
Feb
2
revised What's up with the GeoJSON spec and CRS as a IRM?
added 54 characters in body
Jan
28
awarded  Enlightened
Jan
28
comment What's the most efficient way to load feature attributes into a numpy array?
You may get even better performance by generating the matrix in the layout the fields are received. all_matrix=[f.attributes() for f in l.getFeatures(request)]. If not all attributes are required, you can further reduce network overhead by using QgsFeatureRequest.setSubsetOfAttributes
Jan
28
awarded  Nice Answer
Jan
23
comment check the “quality” for (poly-)lines (density of vertices)
You could also add the no-postgis, no-plugin option with the field calculator: num_points($geometry) :)
Jan
21
comment How to programatically check for a mouse click in QGIS
Since QGIS 2.12, there is no longer a need to do the coordiante dance manually. A simple point = e.mapPoint() is enough, it even supports e.snapPoint() qgis.org/api/classQgsMapMouseEvent.html.
Jan
21
answered capture mouse movement on QgsMapCanvas
Jan
21
revised How to draw a polygon given a distance and bearing in QGIS
added 2 characters in body
Jan
20
revised How to avoid creating corrupt Shapefiles during Editing?
added 12 characters in body
Jan
20
awarded  Nice Answer
Jan
20
revised How to avoid creating corrupt Shapefiles during Editing?
added 13 characters in body
Jan
14
comment Are there any portable versions of QGIS?
There is also OSGeoLive, at the time of writing it's quite outdated at version 2.4, but for future reference: live.osgeo.org/en/index.html
Jan
14
answered PyQGIS couldn't import processing with standalone script
Jan
14
comment Generating equal sized polygons along line with PyQGIS?
That's what ST_Simplify is supposed to take care of but you will need to check if it behaves completely the way you expect.
Jan
13
revised How to draw a polygon given a distance and bearing in QGIS
added 1 character in body
Jan
13
revised How to draw a polygon given a distance and bearing in QGIS
added 90 characters in body