Network analysis

This exercise allows you to experiment with the GRASS 6.4 tools for network analysis.

The usual questions you may ask about a network (a collection of connected lines and nodes) are the following:

In the real world the above questions should be asked in terms of costs of passing through links and nodes. For instance, in terms of travelling time, the same distance can have different costs according to road type; or in a water facility system it can be affected by pipes diameter or leakages. In this tutorial you can try to use the network analysis tools with various cost attributes along the network.

The aim of the exercise is to set up a GIS network to support the fire brigade interventions in the area of North Carolina. Here follows the steps of this process and the tools used:

You need to do the set up of the data first, then the different modules can be done in any order.