Evolution - Programming GPS and OpenStreetMap Applications with Java - page 211

Figure14.2. Every ROApp has to be reconciled with the real world. A game
board should be extracted from a real map with a network for moving objects.
Then, the next cycle can refine the network. A formula (or ratio) to
estimate the population density would be helpful: x stations are feasible
for y players. In the context of a distributed development, the number
of stations should be increased gradually, maybe from 199 to 300 in the
first step. The development in small steps is important, since the game
logic and players' intelligence most likely has to be adapted at a certain,
yet-to-be-determined threshold. With gradual growth, each developer can
work on one component at a time.
Another aspect of creating a new map network is the original design of
the Scotland Yard game board. In the game context, every vehicle type
has it own network, and the rules don't imply any shared links. In the
real world, busses and cars predominantly share the same streets, which
requires multiple features for a number of links, and a slight modification
of the rules.
Don't forget to share your map and compiler at www.roaf.de !