I'm looking for the steps required to produce an origin-destination (OD) cost matrix.
What I'm looking for is a matrix of road distances. The distance matrix tool only produces euclidian distances. The QGIS Roadgraph plugin produces the shortest road distance from one origin to N destinations. What I need is a file containing distances from all origins to the N closest destinations. I have a lot of origins so repeating the analyses with Roadgraph is not an option. Thanks again.
I'm looking for a step-by-step description, starting from scratch (ie, with my 3 shapefiles: origins, destinations, road network).