QGIS: Becoming a GIS Power User

Using the pgRoutingLayer plugin for convenience

The previous recipe, Visualizing pgRouting results in QGIS, showed you how to manually add pgRouting results to the map. In this chapter, we will use the pgRoutingLayer plugin to get more convenient access to the functions that pgRouting offers, including the most basic algorithms, such as Dijkstra's algorithm, which we have used so far, to more complex algorithms, such as drivingDistance and alphashape, which can be used to visualize catchment zones, also known as service areas.

Getting ready

You should first go through the previous recipe, Creating a routing network for pgRouting, to set up the necessary PostGIS tables. Alternatively, you can use your own network tables, but be aware that you may ...