QGIS Planet

Cours PyQGIS 13.11./14.11.2017 à Neuchâtel

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 création d’interfaces graphiques simples

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

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-59d4c56016219941571710-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

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

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-59d4c5601953e951050046/] The original code: [crayon-59d4c5601954e378884767/] The generated code: [crayon-59d4c56019555688166456/] so in do_load_project we get False instead of “my test

Using threads in QGIS python plugins

Here an example on how to work with threads in a consistent and clean manner in QGIS python plugins

QGIS: Qt5 and Python3 migration, current state

Behind the scenes a lot has happened to get ready for Qt5 and Python3. On the same codebase that is becoming the next release QGIS 2.16. This is really a great thing since we can focus work on a single

Prepare your plugins for QGIS 3

QGIS 3 is not yet there and there is still plenty of time to prepare and migrate. But I thought I would give some advice about things that you can keep in mind while working on your plugins to make

Increasing the stability of processing algorithms

Processing just got a new testing framework to improve the long-term stability of this important plugin. And you can help to improve it, even if you are not a software developer! This is yet another piece in our never-stopping crusade to

Geometry generator symbology

Say hello to geometry generators, a new way to use expression syntax to generate a geometry on the fly during the rendering process.
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QField Documentation

After getting QField up and running in Android 5, we felt it was time to start documenting how QField works, we started documenting how to install and use QField. We also added a section on how to handle your data

Passing android Intents to Qt

Working on QField I had the necessity of passing values from the QtActivity.java to the Qt cpp world, here how I did it using an Intent that is sent to the QtActivity (the one you should not edit that comes with

QField for Android 5

It's done, QField runs on any android from 4.0.3 (ICS) with a seamless installing experience. We suggest using at least Android 4.3
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QGIS Crowdfunding: 2.5D Rendering

2.5D rendering

test

SpaceMouse in Ubuntu 15.04

While preparing some 3D scenes for an exibition I discovered the SpaceMouse by 3dconnexion. A neat device we plan on installing in front of a projected globe. To get it to run in Ubuntu first get the drivers from www.3dconnexion.eu/service/drivers.html

QGIS Welcome Page

Whenever you start QGIS you basically do it because? Right, because you need to do GIS work. Ah, how I love rhetorical questions to start a post. And most of the time one continues to work on a QGIS project which

Syntactic sugar for PyQGIS

PyQGIS now supports a nice new addition for handling edit sessions in layers. This way, changes get committed automatically at the end of a successful (python) edit session.

with edit(layer):
    do your changes here()
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Postgres Expression Compiler

Performance This project is all about performance of QGIS with a postgres/postgis database. A lot of people have QGIS connected to postgres/postgis (if you don’t: it’s a great combination in the open source geo stack). Databases are really optimized for

QField in the wild

QField Experimental is out, after a couple of months of requirements gathering, private early alpha testing and foremost tons of emails requesting access to the testes group we decided today to put the current BETA version in the playstore. This means that from now on you can install QField just like any other android app by using the playstore.

QField app on Google Play
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