“A network is a set of connected lines. The networks are usually used to delineate rivers, road network. Network analysis studies the relationship between connected lines in terms of distance and time”
In this module, we look at how we can use QGIS to plan a route based on the shortest distance or the shortest time it takes to travel between two connected lines
Goal: To learn how to use the road graph plugin to calculate routes between two places.
Data: appendix3-local-data
Name | Expectation |
---|---|
Speed |
60 km/hr |
Network layer |
roads_osm.shp |
CRS |
UTM 33S WGS 84 |
Criterion |
Length/time |
Network analysis aims to establish if you can move from A to B and from B to C and is it possible to move from A to C. Network analysis is a type of connectivity analysis. Network analysis varies from simple analysis to complex analysis.
Complexity is achieved by analysis of the network and checking for features which give resistance to a route. Examples of features that bring resistance are the number of traffic lights and terrain, and this affects determining the shortest path between two points in a network. Travelling cost also vary because of these factors.
Click here to download the sample data for the lesson.