How to use it
- Add up to twelve places: search, use your location, or click the map.
- Choose straight line or a road mode. Switch between distance and time with the chips.
- Read the table: rows are the origin, columns the destination.
- Press Copy CSV to paste the table into a spreadsheet.
5 practical uses
- Build a distance table for a tender, a logistics plan or a spreadsheet model.
- Compare candidate warehouse sites by their distance to every customer.
- Pick a meeting venue that is fair for every office.
- Feed a routing or scheduling tool with the distances it needs.
- Check which of several suppliers is nearest to each site.
The maths behind it
The straight-line matrix is the haversine great-circle distance for each pair, n² values. The road matrix comes from the engine's sources-to-targets service, which runs one shortest-path search from each origin over the road graph and reads off the cost to every destination, so it is asymmetric where one-way roads make it so.
Notes
A road matrix is not symmetric: one-way streets and motorway junctions make A to B differ from B to A. A straight-line matrix is. A blank cell means the engine found no road route between the two.
Routes come from Valhalla, an open routing engine on OpenStreetMap data run by FOSSGIS, the German OpenStreetMap association. It is a public, best-effort service: it can be slow at busy times, and a route through a badly mapped area is only as good as the map. Nothing else about you is sent with the request.