Stations are the customers of a VRP which are the requestors of an order, receipt
or service in general. The depot is also considered as a station. As an exception,
depot station is called shortly as depot.
A station can be a passenger, a customer requesting some transportation goods, or
an abstract node which should be serviced.
In logvrp, stations have names, addresses and coordinates. The names, the addresses
and the coordinates are retrieved automatically from map.
Stations in logvrp have the following properties:
Station Sets in logvrp are the sets of stations including the depot. The stations are saved as a set together with the depot station if there exists any. The logvrp solvers (algorithms) operate on the sets.