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Wed Nov 14 15:20:12 2018

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QGIS Planet

Visualize Postgres JSON data in QML widgets

As promised some time ago in “The new QML widgets in QGIS – When widgets get unbridled” we still owe you some fancy unicorns, but first let’s have a look at another nice feature that has been introduced in QGIS 3.4

The new QML widgets in QGIS – When widgets get unbridled

Individuality is the definition of freedom. And freedom is the fundamental requirement of man’s mind. QGIS possibly cannot give you all the freedom you require in life. But at least a lot of freedom in how you manage your work.

QGIS speaks a lot of languages

QGIS is a real cosmopolitan. Born in Alaska sixteen years ago, it has spread all over the world since. Thanks to its open source mentality, it finds not only in economically strong countries big usergroups. No question, that beside all

Using Threads in PyQGIS3

While porting a plugin to QGIS3 I decided to also move all it’s threading infrastructure to QgsTasks. Here three possible variants to implement this. the first uses the static method QgsTask.fromFunction and is simpler to use. A great quick solution.

How to filter features in QGIS using the graphical processing modeler

This article describes a new algorithm for the processing modeler called feature filter algorithm. If you are already familiar with ETL concepts and the graphical modeler, you can directly jump to the section the feature filter algorithm. Building workflows for

Best practices for writing Python QGIS Expression Functions

Recently there have been some questions and discussions about python based expression functions and how parameters like [crayon-5bea85037a44b388289517-i/]  need to be used. So I thought I’d quickly write down how this works. There is some intelligence If the geometry or a

Updating PyQt signals that use lambda in QGIS with 2to3

Just for the sake of documenting things, when running qgis 2to3 on a plugin I encountered a tricky situation regarding signals. [crayon-5b8f49bf38bed549859272/] The original code: [crayon-5b8f49bf38bfd417730445/] The generated code: [crayon-5b8f49bf38c03910524058/] so in do_load_project we get False instead of “my test

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