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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.

PostgREST + PostGIS API Tutorial – Serve Digital Elevation Models

Saturday, 25 January 2020


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In this tutorial you will learn how to build a powerful elevation API serving a Digital Elevation Model using PostgreSQL, PostGIS and PostgREST.

PostgREST + PostGIS API Tutorial – Geospatial API in 5 Minutes

Friday, 20 December 2019


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In this tutorial you will learn how to build a spatial REST API with the powerful PostgREST library utilizing PostGIS under its hood – in mere minutes!

FLASK GEO-API Tutorial — Powerful geospatial FLASK explained

Sunday, 08 December 2019


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Learn in this tutorial how to build a simple but powerful and scalable Geo API from scratch with FLASK and FLASK-RESTPlus, that is able to handle and process basic spatial data like a charm.

PostgREST Tutorial – Installation and Setup

Friday, 25 October 2019


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In this tutorial you will learn how to build a spatial REST API with the powerful PostgREST library utilizing PostGIS under its hood – in mere minutes!

WordPress Plugin Tutorial – Spatial capabilities Explained

Tuesday, 22 October 2019


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This tutorial will give an introduction into enabling WordPress with spatial capabilities via a custom Wordpress plugin and expose those functionalities via the built-in REST API.

React + Redux + Leaflet + TurfJS: Building a Density Based Clustering (DBSCAN) App with the almighty HERE Maps Places API

Wednesday, 14 August 2019


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Learn how to build a simple web-map application with react, redux, turfjs and leaflet which is able to compute DBScan clusters with places provided by HERE Maps.

QGIS 3 Plugin Tutorial – Qt Designer Explained

Friday, 21 June 2019


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A short roundup of Qt Designer, which ships with QGIS and is the recommended program to design Graphical User Interfaces for QGIS Plugins. This post is complementary to our plugin tutorials or just a refresher. It also explains resources.qrc files in more detail, a usual pain point.

QGIS 3 Plugin Tutorial – PyQt Signal & Slot Explained

Thursday, 13 June 2019


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In this reference guide, you'll learn more about the intricacies of the signal & slot concept in PyQt. This concept is very important when dealing with GUI development and while it's beautifully solved by Qt, it can be a little confusing in the beginning.

Valhalla [Part 3]: How to build with elevation support on Ubuntu

Wednesday, 29 May 2019


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If you want to know how to setup Valhalla on your Ubuntu with elevation support, then go ahead with this tutorial. By the end you will have had to prepare your Valhalla setup with all necessary packages and dependencies to finally be able to use Valhalla with elevation support.

React + Redux + Leaflet: Building a HERE Maps Isochrones Web(M)app

Tuesday, 21 May 2019


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In this tutorial you will learn how to use ReactJS, Redux and Leaflet to create a simple but powerful map application which is capable of consuming the HERE isochrones API.

Valhalla [Part 2]: How to run Valhalla on Ubuntu

Sunday, 28 April 2019


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If you simply want to run Valhalla within a docker container, then feel free to dive into this tutorial. However, to understand the individual steps being called in the provided Dockerfile please refer to part 1 and 2 of this Valhalla Routing series of tutorials.

Valhalla [Part 1]: How to install on Ubuntu

Friday, 29 March 2019


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If you are interested how to install Valhalla on your Ubuntu 18.04 server, then go ahead with this tutorial. By the end you will have had to prepare your host instance with all necessary packages and dependencies to finally be able to make and install Valhalla.

Valhalla: How to run with docker on Ubuntu

Monday, 28 January 2019


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If you simply want to run Valhalla within a docker container, then feel free to dive into this tutorial. However, to understand the individual steps being called in the provided Dockerfile please refer to part 1 and 2 of this Valhalla Routing series of tutorials.
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