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.
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.
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.
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.
If you are interested how to run Valhalla on your Ubuntu 18.04 server, then go ahead with this tutorial. Please install Valhalla (part 1 of this tutorial series) first. By the end you will be able to fire turn-by-turn directions requests to Valhalla on your host instance.
Learn how to build a simple web-map application with react, redux and leaflet which is able to geocode any user given address to generate HERE Maps isochrones which are plotted onto the map.
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.
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.
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.