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 LTR, the reading of PostgreSQL JSON and JSONB types. With JSON you have a lot of possibilities for storing unstructured data. In our case, it’s mainly interesting when the data are stored as an array Read more…
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 3.4.0 LTR was released last week and it comes loaded with features supporting big freedom in the configuration of your projects. Let’s focus on the QML Widget. QML is the smart casual look of Read more…
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 the developers, there is a bunch of brave translators giving everything to make and keep QGIS multilingual. It’s translated in over forty languages – even to Mandarin Chinese and Esperanto. Not only the application, but also Read more…
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. If you want need control you can look at the second solution that subclasses QgsTask. In this solution I also show how to create subtasks with interdependencies. The third variant, illustrates how to run a processing Read more…
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 repetitive tasks When building workflows for simple or complex geodata infrastructures, one of the most common tasks one encounters is to extract some of the features and copy them to another destination. Sometimes they need Read more…
Der Kurs richtet sich an PostgreSQL Benutzer, die ihre Administratoren-Kenntisse erweitern wollen. Es werden verschiedene Ansätze erläutert, um den Einsatz ihrer Datenbanken zu optimieren, und anhand von verschiedenen Beispielen geübt.
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 serve for the next two years as one of the board members of the QGIS.org association. He is excited to get the chance to work together with the PSC and the fantastic QGIS community to Read more…
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 release since September 2013 when QGIS 2.0 was released. During the release cycles of all 2.x releases, the QGIS Python API remained stable. This means that a plugin or script meant to be used in Read more…
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 solutions just using triggers and rules. In this post I’ll explain what we did lately based on a project with a customer. He needed to assure the consistency of data but still give his employees the possibility Read more…
Lately, I have been confronted with the need of translating Interlis files (from French to German) to use queries originally developed for German data. I decided to create an automated convertor for Interlis (version 1) Transfer Format files (.ITF) based on the existing cadastral data model from the Swiss confederation (DM01AVCH). The ILI model file conversion has been achieved manually once. This was quite simple since the used model is an extension with little to Read more…