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Map Matching in PostGIS with Valhalla and PL/Python

Thursday, 07 April 2022


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In this article, we will show how to map match GPS traces from PostGIS with pyvalhalla and PL/Python!

pgRouting Performance Tuning

Tuesday, 15 March 2022


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Speed up your pgRouting queries with just a few simple tweaks and tricks!

Running OSRM with NodeJS Bindings

Thursday, 06 January 2022


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Open Source Routing Machine features the powerful ability to run it directly with its NodeJS bindings. This tutorial gives you a quick overview of what is possible.

QGIS 3 Plugin Tutorial – Background Processing with QgsTask

Monday, 13 September 2021


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Learn how to set up automated tests for your QGIS plugin to avoid frustration of your future self, plugin users and the general community. It's an often overlooked part of plugin development, yet a very crucial one. Read this tutorial to see it's really not that painful. Includes the setup of Github Actions to run your tests on every push/pull request.

Nordex Energy – Case Study

Tuesday, 06 July 2021


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Together with Nordex Energy, one of the world's largest wind turbine manufacturers, we were given the task to automate the planning of roads to connect the wind turbines to each other. In this article we will focus on the problem itself, the approach we decided to take and the challenges we encountered along the way.

QGIS 3 Plugin Tutorial – Geocoding with Nominatim Part 4 (Tests & CI)

Wednesday, 05 May 2021


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Learn how to set up automated tests for your QGIS plugin to avoid frustration of your future self, plugin users and the general community. It's an often overlooked part of plugin development, yet a very crucial one. Read this tutorial to see it's really not that painful. Includes the setup of Github Actions to run your tests on every push/pull request.

QGIS 3 Plugin Tutorial – Geocoding with Nominatim Part 3 (Best Practices)

Monday, 22 March 2021


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Our third tutorial in the QGIS plugin development series focuses on improving code maintenance of QGIS plugins. We will introduce linters, a better code structure and some highly useful tips and tricks for plugin development.

QGIS 3 Plugin Tutorial – Geocoding with Nominatim Part 2 (Interactivity)

Sunday, 21 March 2021


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Our second tutorial in the QGIS plugin development series focuses on QGIS and user interaction. You will learn how capture a point clicked on the map canvas by the user, a few practical examples of the concept of signals & slots in PyQt, and then some more.

QGIS 3 Plugin Tutorial – Geocoding with Nominatim Part 1 (First Steps)

Saturday, 13 March 2021


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Follow our tutorial to get a better hang of developing QGIS plugins in QGIS v3.x. The resulting plugin will be capable of querying Nominatim's Reverse Geocoding API from user generated Lat/Long or X/Y in arbitrary coordinate systems and parse the API result into a QGIS Point layer.

QGIS 3 Plugin Tutorial – Plugin development reference guide

Friday, 12 March 2021


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This post provides a basic reference guide for plugin development in QGIS v3. It describes the most important concepts around QGIS plugins, which a developer should be aware of, such as mandatory methods expected by QGIS, detailed explanation of the output of Plugin Builder 3 and more.

QGIS 3 Plugin Tutorial – Set up a Plugin Repository Explained

Sunday, 21 February 2021


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Hosting your own QGIS plugin repository can be very beneficial to serve plugins to a limited user base and provide them the comfort of installing and updating your plugins through QGIS. Learn in this tutorial how easy it is to create your own QGIS plugin repository.

pgRouting & PostGIS – Customized Routing

Wednesday, 03 February 2021


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Shortest paths aren't always what you would expect. With this technical tutorial we want to explain how easy it is to tinker with routing algorithms using pgRouting, PostGIS & OpenStreetMap data.

Open Source Routing Engines And Algorithms – An Overview

Friday, 04 December 2020


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Finding the right routing engine for your use cases can be a tedious task. We compiled an overview for the most popular FOSS routing frameworks to help guide the decision.

QGIS Actions Tutorial – Reverse Geocoding Points with the HERE Maps API

Sunday, 23 August 2020


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Our first tutorial in the QGIS Actions series focuses on how to consume services with your point data. You will learn how to generate random points in your polygon and send their coordinates to the HERE Maps Reverse Geocoder API.

Measuring Distances and Why Projections Matter (+ Practical Examples)

Thursday, 16 April 2020


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Entering the world of projections can be slightly overwhelming. Basically every projection has advantages and disadvantages. Some may preserve elements of direction, distance or area better or worse than others which is why a careful selection of a suitable projection is so crucial.
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