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

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Posted in C++, GIS, Non-commercial, Programming, QGIS

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.

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Posted in Non-commercial, PyQt, Python, QGIS

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

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Posted in Expressions, Non-commercial, Processing, QField, QGIS

Marco becomes QGIS.org Co-chair

We are very proud to announce that one of our founders and directors Marco Bernasocchi was elected as QGIS.org project steering committee (PSC) co-chair. With over 10 years of involvement with QGIS (he started working with QGIS 0.6) Marco will

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Posted in Featured, Non-commercial, QGIS

Porting QGIS plugins to API v3 – Strategy and tools

The Release of QGIS 3.0 was a great success and with the first LTR (3.4) scheduled for release this fall, it is now the perfect time to port your plugins to the new API. QGIS 3.0 is the first major

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Posted in Featured, Non-commercial, PyQt, Python, QGIS

PostgreSQL back end solution for quality assurance and data archive

Did you know that the possibilities to make a full QGIS back end solution for quality assurance and archiving in PostgreSQL are immense? SQL has it’s well known limitations, but with a little bit creativity you can make quite nice

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Posted in Non-commercial, PostgreSQL, QField, QGIS, Scripts

Cours PyQGIS 13.11./14.11.2017 à Neuchâtel

Le cours est complet. Le cours est destiné aux utilisateurs avancés de QGIS qui souhaitent accroître leurs possibilités grâce à l’utilisation de python dans QGIS. Lors de cette formation, nous aborderons différentes possibilités d’interaction avec l’API QGIS ainsi que la

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Posted in Courses, PyQGIS, Python, QGIS, QGIS Plugins

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 usesGeometry  need to be used. So I thought I’d quickly write down how this works. There is some intelligence If the geometry or a

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Posted in Expressions, Non-commercial, Python, QGIS

QGIS Expressions Engine: Performance boost

Expressions in QGIS are more and more widely used for all kinds of purposes. For example the recently introduced geometry generators allow drawing awesome effects with modified feature geometries on the fly. The last days at the QGIS developer meeting

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Posted in Expressions, GIS, Non-commercial, QGIS

QGIS2 compatibility plugin

Lately I’ve been spending time porting a bigger plugin from QGIS 2.8 to 3 while maintaining 2.8 compatibility. You can find it at https://github.com/opengisch/qgis2compat/ and http://plugins.qgis.org/plugins/qgis2compat/ One code to rule them all. My target was to have to edit the

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Posted in Non-commercial, PyQt, QGIS, QGIS Plugins
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